#### ISSUE DESCRIPTION
1) Researchers have discovered that on some AMD CPUs, the implementation of IBPB (Indirect Branch Prediction Barrier) does not behave according to the specification.
Specifically, IBPB fails to properly flush the RAS (Return Address Stack, also RSB - Return Stack Buffer - in Intel terminology; one of the hardware prediction structures), allowing attacker controlled values to survive across a deliberate attempt to purge said values.
AMD have allocated CVE-2022-23824.
For more details, see: <a href="https://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1040">https://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1040</a>
2) AMD have discovered that under some circumstances, the previous reported information about Branch Type Confusion (XSA-407 / CVE-2022-23825) was inaccurate.
Specifically, it was previously reported that the small speculation window was not long enough to contain two dependent loads. It has turned out not to be true, and in some circumstances, the speculation window is long enough to contain two dependent loads.
AMD have not allocated a new CVE for this issue.
For more details, see: <a href="https://www.amd.com/system/files/documents/technical-guidance-for-mitigating-branch-type-confusion.pdf">https://www.amd.com/system/files/documents/technical-guidance-for-mitigating-branch-type-confusion.pdf</a>
#### IMPACT
An attacker might be able to infer the contents of memory belonging to other guests.
Due to the interaction of this issue with previous speculation fixes in their default configuration, an attacker cannot leverage this vulnerability to infer the content of memory that belongs to Xen itself.
#### VULNERABLE SYSTEMS
Systems running all versions of Xen are affected.
Only AMD CPUs are potentially vulnerable. CPUs from other hardware vendors are not impacted.
Whether a CPU is potentially vulnerable depends on its microarchitecture. Consult your hardware vendor.
The fix for XSA-407 / CVE-2022-23825 elected, out of an abundance of caution, to use IBPB-on-entry as a Branch Type Confusion mitigation. It is believed that this mitigation is still sufficient, in light of the new discoveries. Therefore, no changes are being provided at this time.
For CVE-2022-23824, patches are being provided on all releases as the bug pertains to a specific speculation control not working as documented, but there are a number circumstances where safety is provided as a side effect of other speculative mitigations.
* The issue is that IBPB doesn't flush the RAS (Return Address Stack). Also called the RSB (Return Stack Buffer) in Intel terminology. Xen tends to follow Intel's terminology.
* By default, Xen uses IBPB on a context switch from one vCPU to another vCPU to prevent guest to guest attacks. This action is not about protecting Xen from a malicious guest; such protections are elsewhere.
* By default, Xen flushes the RAS/RSB on VMExit from HVM/PVH vCPUs, in order to protect itself from a malicious vCPU. Therefore, a malicious HVM/PVH guest cannot mount an attack using this vulnerability.
* Whether Xen flushes the RAS/RSB by default on exit from PV vCPUs (again, to protect itself) is more complicated. There is an optimisation commonly used by native OSes when the SMEP (Supervisor Mode Execution Prevention) feature is active, which Xen can make use in some cases.
- Xen 4.15 and older flush the RAS/RSB by default.
- Xen 4.16 introduced an optimisation to skip flushing the RAS/RSB when safe. For CPUs impacted by CVE-2022-23824, this comes down to whether 32-bit PV guest support is enabled or not; *irrespective* of whether any 32-bit PV guests are actively running.
If Xen is built with CONFIG_PV32=n, or Xen is booted with `pv=no-32`, or 32-bit PV guests are disabled as a side effect of CET being active (requires a capable toolchain, CONFIG_XEN_SHSTK=y or CONFIG_XEN_IBT=y, and capable hardware), then Xen will by default use the performance optimisation. In this case, a malicious 64-bit PV guest can mount an attack using this issue.
Note: This analysis is only applicable for systems which are fully up to date with previous speculation-related XSAs, and have not used `spec-ctrl=` on the Xen command line to tune the speculative mitigations.
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It has turned out not to be true, and in some circumstances, the speculation window is long enough to contain two dependent loads.\n AMD have not allocated a new CVE for this issue.\n For more details, see: <a href=\"https://www.amd.com/system/files/documents/technical-guidance-for-mitigating-branch-type-confusion.pdf\">https://www.amd.com/system/files/documents/technical-guidance-for-mitigating-branch-type-confusion.pdf</a>\n#### IMPACT\nAn attacker might be able to infer the contents of memory belonging to other guests.\nDue to the interaction of this issue with previous speculation fixes in their default configuration, an attacker cannot leverage this vulnerability to infer the content of memory that belongs to Xen itself.\n#### VULNERABLE SYSTEMS\nSystems running all versions of Xen are affected.\nOnly AMD CPUs are potentially vulnerable. CPUs from other hardware vendors are not impacted.\nWhether a CPU is potentially vulnerable depends on its microarchitecture. Consult your hardware vendor.\nThe fix for XSA-407 / CVE-2022-23825 elected, out of an abundance of caution, to use IBPB-on-entry as a Branch Type Confusion mitigation. It is believed that this mitigation is still sufficient, in light of the new discoveries. Therefore, no changes are being provided at this time.\nFor CVE-2022-23824, patches are being provided on all releases as the bug pertains to a specific speculation control not working as documented, but there are a number circumstances where safety is provided as a side effect of other speculative mitigations.\n * The issue is that IBPB doesn't flush the RAS (Return Address Stack). Also called the RSB (Return Stack Buffer) in Intel terminology. Xen tends to follow Intel's terminology.\n * By default, Xen uses IBPB on a context switch from one vCPU to another vCPU to prevent guest to guest attacks. This action is not about protecting Xen from a malicious guest; such protections are elsewhere.\n * By default, Xen flushes the RAS/RSB on VMExit from HVM/PVH vCPUs, in order to protect itself from a malicious vCPU. Therefore, a malicious HVM/PVH guest cannot mount an attack using this vulnerability.\n * Whether Xen flushes the RAS/RSB by default on exit from PV vCPUs (again, to protect itself) is more complicated. There is an optimisation commonly used by native OSes when the SMEP (Supervisor Mode Execution Prevention) feature is active, which Xen can make use in some cases.\n - Xen 4.15 and older flush the RAS/RSB by default.\n - Xen 4.16 introduced an optimisation to skip flushing the RAS/RSB when safe. 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In this case, a malicious 64-bit PV guest can mount an attack using this issue.\nNote: This analysis is only applicable for systems which are fully up to date with previous speculation-related XSAs, and have not used `spec-ctrl=` on the Xen command line to tune the speculative mitigations.\n", "published": "2022-11-08T17:34:00", "modified": "2022-11-10T15:13:00", "epss": [{"cve": "CVE-2022-23824", "epss": 0.00054, "percentile": 0.19506, "modified": "2023-05-27"}], "cvss": {"score": 1.7, "vector": "AV:L/AC:L/Au:S/C:P/I:N/A:N"}, "cvss2": {"cvssV2": {"version": "2.0", "vectorString": "AV:L/AC:L/Au:S/C:P/I:N/A:N", "accessVector": "LOCAL", "accessComplexity": "LOW", "authentication": "SINGLE", "confidentialityImpact": "PARTIAL", "integrityImpact": "NONE", "availabilityImpact": "NONE", "baseScore": 1.7}, "severity": "LOW", "exploitabilityScore": 3.1, "impactScore": 2.9, "acInsufInfo": false, "obtainAllPrivilege": false, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, 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A local user could use this flaw to crash the system or potentially escalate their privileges on the system. (CVE-2022-1998)\n\n - Improper Update of Reference Count vulnerability in net/sched of Linux Kernel allows local attacker to cause privilege escalation to root. This issue affects: Linux Kernel versions prior to 5.18; version 4.14 and later versions. (CVE-2022-29581)\n\n - Intel microprocessor generations 6 to 8 are affected by a new Spectre variant that is able to bypass their retpoline mitigation in the kernel to leak arbitrary data. An attacker with unprivileged user access can hijack return instructions to achieve arbitrary speculative code execution under certain microarchitecture-dependent conditions. (CVE-2022-29901)\n\n - A memory leak flaw was found in the Linux kernel's DMA subsystem, in the way a user calls DMA_FROM_DEVICE.\n This flaw allows a local user to read random memory from the kernel space. 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'release':'9', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-tools-5.14.0'},\n {'reference':'kernel-tools-5.14.0-162.6.1.el9_1', 'cpu':'x86_64', 'release':'9', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-tools-5.14.0'},\n {'reference':'kernel-tools-libs-5.14.0-162.6.1.el9_1', 'cpu':'aarch64', 'release':'9', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-tools-libs-5.14.0'},\n {'reference':'kernel-tools-libs-5.14.0-162.6.1.el9_1', 'cpu':'x86_64', 'release':'9', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-tools-libs-5.14.0'},\n {'reference':'kernel-tools-libs-devel-5.14.0-162.6.1.el9_1', 'cpu':'aarch64', 'release':'9', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-tools-libs-devel-5.14.0'},\n {'reference':'kernel-tools-libs-devel-5.14.0-162.6.1.el9_1', 'cpu':'x86_64', 'release':'9', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-tools-libs-devel-5.14.0'},\n {'reference':'perf-5.14.0-162.6.1.el9_1', 'cpu':'aarch64', 'release':'9', 'rpm_spec_vers_cmp':TRUE},\n 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exit(0);\n}\nelse\n{\n var tested = pkg_tests_get();\n if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);\n else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'bpftool / kernel / kernel-abi-stablelists / etc');\n}\n", "cvss": {"score": 0.0, "vector": "NONE"}}, {"lastseen": "2023-05-17T16:39:06", "description": "The remote AlmaLinux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the ALSA-2022:8267 advisory.\n\n - An issue was discovered in the Linux kernel through 5.16.11. The mixed IPID assignment method with the hash-based IPID assignment policy allows an off-path attacker to inject data into a victim's TCP session or terminate that session. (CVE-2020-36516)\n\n - A flaw use-after-free in function sco_sock_sendmsg() of the Linux kernel HCI subsystem was found in the way user calls ioct UFFDIO_REGISTER or other way triggers race condition of the call sco_conn_del() together with the call sco_sock_sendmsg() with the expected controllable faulting memory page. A privileged local user could use this flaw to crash the system or escalate their privileges on the system.\n (CVE-2021-3640)\n\n - A denial of service (DOS) issue was found in the Linux kernel's smb2_ioctl_query_info function in the fs/cifs/smb2ops.c Common Internet File System (CIFS) due to an incorrect return from the memdup_user function. This flaw allows a local, privileged (CAP_SYS_ADMIN) attacker to crash the system.\n (CVE-2022-0168)\n\n - A flaw null pointer dereference in the Linux kernel UDF file system functionality was found in the way user triggers udf_file_write_iter function for the malicious UDF image. A local user could use this flaw to crash the system. Actual from Linux kernel 4.2-rc1 till 5.17-rc2. (CVE-2022-0617)\n\n - A memory leak flaw was found in the Linux kernel's DMA subsystem, in the way a user calls DMA_FROM_DEVICE.\n This flaw allows a local user to read random memory from the kernel space. (CVE-2022-0854)\n\n - A flaw was found in the Linux kernel in net/netfilter/nf_tables_core.c:nft_do_chain, which can cause a use-after-free. This issue needs to handle 'return' with proper preconditions, as it can lead to a kernel information leak problem caused by a local, unprivileged attacker. (CVE-2022-1016)\n\n - A use-after-free flaw was found in the Linux kernel's sound subsystem in the way a user triggers concurrent calls of PCM hw_params. The hw_free ioctls or similar race condition happens inside ALSA PCM for other ioctls. This flaw allows a local user to crash or potentially escalate their privileges on the system. (CVE-2022-1048)\n\n - A use-after-free flaw was found in fs/ext4/namei.c:dx_insert_block() in the Linux kernel's filesystem sub- component. This flaw allows a local attacker with a user privilege to cause a denial of service.\n (CVE-2022-1184)\n\n - A use-after-free vulnerability was found in drm_lease_held in drivers/gpu/drm/drm_lease.c in the Linux kernel due to a race problem. This flaw allows a local user privilege attacker to cause a denial of service (DoS) or a kernel information leak. (CVE-2022-1280)\n\n - A vulnerability was found in the pfkey_register function in net/key/af_key.c in the Linux kernel. This flaw allows a local, unprivileged user to gain access to kernel memory, leading to a system crash or a leak of internal kernel information. (CVE-2022-1353)\n\n - A use-after-free flaw was found in the Linux kernel's Atheros wireless adapter driver in the way a user forces the ath9k_htc_wait_for_target function to fail with some input messages. This flaw allows a local user to crash or potentially escalate their privileges on the system. (CVE-2022-1679)\n\n - A NULL pointer dereference flaw was found in the Linux kernel's KVM module, which can lead to a denial of service in the x86_emulate_insn in arch/x86/kvm/emulate.c. This flaw occurs while executing an illegal instruction in guest in the Intel CPU. (CVE-2022-1852)\n\n - A use after free in the Linux kernel File System notify functionality was found in the way user triggers copy_info_records_to_user() call to fail in copy_event_to_user(). A local user could use this flaw to crash the system or potentially escalate their privileges on the system. (CVE-2022-1998)\n\n - An integer coercion error was found in the openvswitch kernel module. Given a sufficiently large number of actions, while copying and reserving memory for a new action of a new flow, the reserve_sfa_size() function does not return -EMSGSIZE as expected, potentially leading to an out-of-bounds write access. This flaw allows a local user to crash or potentially escalate their privileges on the system. (CVE-2022-2639)\n\n - Product: AndroidVersions: Android kernelAndroid ID: A-224546354References: Upstream kernel (CVE-2022-20368)\n\n - Incomplete cleanup of multi-core shared buffers for some Intel(R) Processors may allow an authenticated user to potentially enable information disclosure via local access. (CVE-2022-21123)\n\n - Incomplete cleanup of microarchitectural fill buffers on some Intel(R) Processors may allow an authenticated user to potentially enable information disclosure via local access. (CVE-2022-21125)\n\n - Incomplete cleanup in specific special register write operations for some Intel(R) Processors may allow an authenticated user to potentially enable information disclosure via local access. (CVE-2022-21166)\n\n - KGDB and KDB allow read and write access to kernel memory, and thus should be restricted during lockdown.\n An attacker with access to a serial port could trigger the debugger so it is important that the debugger respect the lockdown mode when/if it is triggered. (CVE-2022-21499)\n\n - Aliases in the branch predictor may cause some AMD processors to predict the wrong branch type potentially leading to information disclosure. (CVE-2022-23825)\n\n - An issue was discovered in fs/nfs/dir.c in the Linux kernel before 5.16.5. If an application sets the O_DIRECTORY flag, and tries to open a regular file, nfs_atomic_open() performs a regular lookup. If a regular file is found, ENOTDIR should occur, but the server instead returns uninitialized data in the file descriptor. (CVE-2022-24448)\n\n - Non-transparent sharing of return predictor targets between contexts in some Intel(R) Processors may allow an authorized user to potentially enable information disclosure via local access. (CVE-2022-26373)\n\n - ems_usb_start_xmit in drivers/net/can/usb/ems_usb.c in the Linux kernel through 5.17.1 has a double free.\n (CVE-2022-28390)\n\n - The SUNRPC subsystem in the Linux kernel through 5.17.2 can call xs_xprt_free before ensuring that sockets are in the intended state. (CVE-2022-28893)\n\n - Improper Update of Reference Count vulnerability in net/sched of Linux Kernel allows local attacker to cause privilege escalation to root. This issue affects: Linux Kernel versions prior to 5.18; version 4.14 and later versions. (CVE-2022-29581)\n\n - Mis-trained branch predictions for return instructions may allow arbitrary speculative code execution under certain microarchitecture-dependent conditions. (CVE-2022-29900)\n\n - Intel microprocessor generations 6 to 8 are affected by a new Spectre variant that is able to bypass their retpoline mitigation in the kernel to leak arbitrary data. An attacker with unprivileged user access can hijack return instructions to achieve arbitrary speculative code execution under certain microarchitecture-dependent conditions. (CVE-2022-29901)\n\n - nfqnl_mangle in net/netfilter/nfnetlink_queue.c in the Linux kernel through 5.18.14 allows remote attackers to cause a denial of service (panic) because, in the case of an nf_queue verdict with a one-byte nfta_payload attribute, an skb_pull can encounter a negative skb->len. (CVE-2022-36946)\n\n - An issue was discovered in net/netfilter/nf_tables_api.c in the Linux kernel before 5.19.6. A denial of service can occur upon binding to an already bound chain. (CVE-2022-39190)\n\n - kernel: nf_tables cross-table potential use-after-free may lead to local privilege escalation (CVE-2022-2586)\n\n - AMD: CVE-2022-23816 AMD CPU Branch Type Confusion (CVE-2022-23816)\n\nNote that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.", "cvss3": {}, "published": "2022-11-18T00:00:00", "type": "nessus", "title": "AlmaLinux 9 : kernel (ALSA-2022:8267)", "bulletinFamily": "scanner", "cvss2": {}, "cvelist": ["CVE-2020-36516", "CVE-2021-3640", "CVE-2022-0168", "CVE-2022-0617", "CVE-2022-0854", "CVE-2022-1016", "CVE-2022-1048", "CVE-2022-1184", "CVE-2022-1280", "CVE-2022-1353", "CVE-2022-1679", "CVE-2022-1852", "CVE-2022-1998", "CVE-2022-20368", "CVE-2022-21123", "CVE-2022-21125", "CVE-2022-21166", "CVE-2022-21499", "CVE-2022-23816", "CVE-2022-23825", "CVE-2022-24448", "CVE-2022-2586", "CVE-2022-26373", "CVE-2022-2639", "CVE-2022-28390", "CVE-2022-28893", "CVE-2022-29581", "CVE-2022-29900", "CVE-2022-29901", "CVE-2022-36946", "CVE-2022-39190"], "modified": "2022-12-13T00:00:00", "cpe": ["p-cpe:/a:alma:linux:bpftool", "p-cpe:/a:alma:linux:kernel", "p-cpe:/a:alma:linux:kernel-abi-stablelists", "p-cpe:/a:alma:linux:kernel-core", "p-cpe:/a:alma:linux:kernel-cross-headers", "p-cpe:/a:alma:linux:kernel-debug", "p-cpe:/a:alma:linux:kernel-debug-core", "p-cpe:/a:alma:linux:kernel-debug-devel", "p-cpe:/a:alma:linux:kernel-debug-devel-matched", "p-cpe:/a:alma:linux:kernel-debug-modules", "p-cpe:/a:alma:linux:kernel-debug-modules-extra", "p-cpe:/a:alma:linux:kernel-devel", "p-cpe:/a:alma:linux:kernel-devel-matched", "p-cpe:/a:alma:linux:kernel-headers", "p-cpe:/a:alma:linux:kernel-modules", "p-cpe:/a:alma:linux:kernel-modules-extra", "p-cpe:/a:alma:linux:kernel-tools", "p-cpe:/a:alma:linux:kernel-tools-libs", "p-cpe:/a:alma:linux:kernel-tools-libs-devel", "p-cpe:/a:alma:linux:kernel-zfcpdump", "p-cpe:/a:alma:linux:kernel-zfcpdump-core", "p-cpe:/a:alma:linux:kernel-zfcpdump-devel", "p-cpe:/a:alma:linux:kernel-zfcpdump-devel-matched", "p-cpe:/a:alma:linux:kernel-zfcpdump-modules", "p-cpe:/a:alma:linux:kernel-zfcpdump-modules-extra", "p-cpe:/a:alma:linux:perf", "p-cpe:/a:alma:linux:python3-perf", "cpe:/o:alma:linux:9", "cpe:/o:alma:linux:9::appstream", "cpe:/o:alma:linux:9::baseos", "cpe:/o:alma:linux:9::crb"], "id": "ALMA_LINUX_ALSA-2022-8267.NASL", "href": "https://www.tenable.com/plugins/nessus/167835", "sourceData": "#%NASL_MIN_LEVEL 80900\n##\n# (C) Tenable, Inc.\n#\n# The package checks in this plugin were extracted from\n# AlmaLinux Security Advisory ALSA-2022:8267.\n##\n\ninclude('compat.inc');\n\nif (description)\n{\n script_id(167835);\n script_version(\"1.4\");\n script_set_attribute(attribute:\"plugin_modification_date\", value:\"2022/12/13\");\n\n script_cve_id(\n \"CVE-2020-36516\",\n \"CVE-2021-3640\",\n \"CVE-2022-0168\",\n \"CVE-2022-0617\",\n \"CVE-2022-0854\",\n \"CVE-2022-1016\",\n \"CVE-2022-1048\",\n \"CVE-2022-1184\",\n \"CVE-2022-1280\",\n \"CVE-2022-1353\",\n \"CVE-2022-1679\",\n \"CVE-2022-1852\",\n \"CVE-2022-1998\",\n \"CVE-2022-2586\",\n \"CVE-2022-2639\",\n \"CVE-2022-20368\",\n \"CVE-2022-21123\",\n \"CVE-2022-21125\",\n \"CVE-2022-21166\",\n \"CVE-2022-21499\",\n \"CVE-2022-23816\",\n \"CVE-2022-23825\",\n \"CVE-2022-24448\",\n \"CVE-2022-26373\",\n \"CVE-2022-28390\",\n \"CVE-2022-28893\",\n \"CVE-2022-29581\",\n \"CVE-2022-29900\",\n \"CVE-2022-29901\",\n \"CVE-2022-36946\",\n \"CVE-2022-39190\"\n );\n script_xref(name:\"ALSA\", value:\"2022:8267\");\n script_xref(name:\"CEA-ID\", value:\"CEA-2022-0026\");\n\n script_name(english:\"AlmaLinux 9 : kernel (ALSA-2022:8267)\");\n\n script_set_attribute(attribute:\"synopsis\", value:\n\"The remote AlmaLinux host is missing one or more security updates.\");\n script_set_attribute(attribute:\"description\", value:\n\"The remote AlmaLinux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the\nALSA-2022:8267 advisory.\n\n - An issue was discovered in the Linux kernel through 5.16.11. The mixed IPID assignment method with the\n hash-based IPID assignment policy allows an off-path attacker to inject data into a victim's TCP session\n or terminate that session. (CVE-2020-36516)\n\n - A flaw use-after-free in function sco_sock_sendmsg() of the Linux kernel HCI subsystem was found in the\n way user calls ioct UFFDIO_REGISTER or other way triggers race condition of the call sco_conn_del()\n together with the call sco_sock_sendmsg() with the expected controllable faulting memory page. A\n privileged local user could use this flaw to crash the system or escalate their privileges on the system.\n (CVE-2021-3640)\n\n - A denial of service (DOS) issue was found in the Linux kernel's smb2_ioctl_query_info function in the\n fs/cifs/smb2ops.c Common Internet File System (CIFS) due to an incorrect return from the memdup_user\n function. This flaw allows a local, privileged (CAP_SYS_ADMIN) attacker to crash the system.\n (CVE-2022-0168)\n\n - A flaw null pointer dereference in the Linux kernel UDF file system functionality was found in the way\n user triggers udf_file_write_iter function for the malicious UDF image. A local user could use this flaw\n to crash the system. Actual from Linux kernel 4.2-rc1 till 5.17-rc2. (CVE-2022-0617)\n\n - A memory leak flaw was found in the Linux kernel's DMA subsystem, in the way a user calls DMA_FROM_DEVICE.\n This flaw allows a local user to read random memory from the kernel space. (CVE-2022-0854)\n\n - A flaw was found in the Linux kernel in net/netfilter/nf_tables_core.c:nft_do_chain, which can cause a\n use-after-free. This issue needs to handle 'return' with proper preconditions, as it can lead to a kernel\n information leak problem caused by a local, unprivileged attacker. 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(CVE-2022-21123)\n\n - Incomplete cleanup of microarchitectural fill buffers on some Intel(R) Processors may allow an\n authenticated user to potentially enable information disclosure via local access. (CVE-2022-21125)\n\n - Incomplete cleanup in specific special register write operations for some Intel(R) Processors may allow an\n authenticated user to potentially enable information disclosure via local access. (CVE-2022-21166)\n\n - KGDB and KDB allow read and write access to kernel memory, and thus should be restricted during lockdown.\n An attacker with access to a serial port could trigger the debugger so it is important that the debugger\n respect the lockdown mode when/if it is triggered. (CVE-2022-21499)\n\n - Aliases in the branch predictor may cause some AMD processors to predict the wrong branch type potentially\n leading to information disclosure. (CVE-2022-23825)\n\n - An issue was discovered in fs/nfs/dir.c in the Linux kernel before 5.16.5. 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vulnerability in function sco_sock_sendmsg() (CVE-2021-3640)\n\n - kernel: smb2_ioctl_query_info NULL pointer dereference (CVE-2022-0168)\n\n - kernel: NULL pointer dereference in udf_expand_file_adinicbdue() during writeback (CVE-2022-0617)\n\n - kernel: swiotlb information leak with DMA_FROM_DEVICE (CVE-2022-0854)\n\n - kernel: uninitialized registers on stack in nft_do_chain can cause kernel pointer leakage to UM (CVE-2022-1016)\n\n - kernel: race condition in snd_pcm_hw_free leading to use-after-free (CVE-2022-1048)\n\n - kernel: use-after-free and memory errors in ext4 when mounting and operating on a corrupted image (CVE-2022-1184)\n\n - kernel: concurrency use-after-free between drm_setmaster_ioctl and drm_mode_getresources (CVE-2022-1280)\n\n - kernel: kernel info leak issue in pfkey_register (CVE-2022-1353)\n\n - kernel: use-after-free in ath9k_htc_probe_device() could cause an escalation of privileges (CVE-2022-1679)\n\n - kernel: NULL pointer dereference in x86_emulate_insn 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'rpm_spec_vers_cmp':TRUE},\n {'reference':'kernel-rt-core-5.14.0-162.6.1.rt21.168.el9_1', 'cpu':'x86_64', 'release':'9', 'rpm_spec_vers_cmp':TRUE},\n {'reference':'kernel-rt-debug-5.14.0-162.6.1.rt21.168.el9_1', 'cpu':'x86_64', 'release':'9', 'rpm_spec_vers_cmp':TRUE},\n {'reference':'kernel-rt-debug-core-5.14.0-162.6.1.rt21.168.el9_1', 'cpu':'x86_64', 'release':'9', 'rpm_spec_vers_cmp':TRUE},\n {'reference':'kernel-rt-debug-devel-5.14.0-162.6.1.rt21.168.el9_1', 'cpu':'x86_64', 'release':'9', 'rpm_spec_vers_cmp':TRUE},\n {'reference':'kernel-rt-debug-kvm-5.14.0-162.6.1.rt21.168.el9_1', 'cpu':'x86_64', 'release':'9', 'rpm_spec_vers_cmp':TRUE},\n {'reference':'kernel-rt-debug-modules-5.14.0-162.6.1.rt21.168.el9_1', 'cpu':'x86_64', 'release':'9', 'rpm_spec_vers_cmp':TRUE},\n {'reference':'kernel-rt-debug-modules-extra-5.14.0-162.6.1.rt21.168.el9_1', 'cpu':'x86_64', 'release':'9', 'rpm_spec_vers_cmp':TRUE},\n {'reference':'kernel-rt-devel-5.14.0-162.6.1.rt21.168.el9_1', 'cpu':'x86_64', 'release':'9', 'rpm_spec_vers_cmp':TRUE},\n {'reference':'kernel-rt-kvm-5.14.0-162.6.1.rt21.168.el9_1', 'cpu':'x86_64', 'release':'9', 'rpm_spec_vers_cmp':TRUE},\n {'reference':'kernel-rt-modules-5.14.0-162.6.1.rt21.168.el9_1', 'cpu':'x86_64', 'release':'9', 'rpm_spec_vers_cmp':TRUE},\n {'reference':'kernel-rt-modules-extra-5.14.0-162.6.1.rt21.168.el9_1', 'cpu':'x86_64', 'release':'9', 'rpm_spec_vers_cmp':TRUE}\n ]\n }\n];\n\nvar applicable_repo_urls = rhel_determine_applicable_repository_urls(constraints:constraints);\nif(applicable_repo_urls == RHEL_REPOS_NO_OVERLAP_MESSAGE) exit(0, RHEL_REPO_NOT_ENABLED);\n\nvar flag = 0;\nforeach var constraint_array ( constraints ) {\n var repo_relative_urls = NULL;\n if (!empty_or_null(constraint_array['repo_relative_urls'])) repo_relative_urls = constraint_array['repo_relative_urls'];\n foreach var pkg ( constraint_array['pkgs'] ) {\n var reference = NULL;\n var _release = NULL;\n var sp = NULL;\n var _cpu = NULL;\n var el_string = NULL;\n var rpm_spec_vers_cmp = NULL;\n var epoch = NULL;\n var allowmaj = NULL;\n var exists_check = NULL;\n if (!empty_or_null(pkg['reference'])) reference = pkg['reference'];\n if (!empty_or_null(pkg['release'])) _release = 'RHEL' + pkg['release'];\n if (!empty_or_null(pkg['sp'])) sp = pkg['sp'];\n if (!empty_or_null(pkg['cpu'])) _cpu = pkg['cpu'];\n if (!empty_or_null(pkg['el_string'])) el_string = pkg['el_string'];\n if (!empty_or_null(pkg['rpm_spec_vers_cmp'])) rpm_spec_vers_cmp = pkg['rpm_spec_vers_cmp'];\n if (!empty_or_null(pkg['epoch'])) epoch = pkg['epoch'];\n if (!empty_or_null(pkg['allowmaj'])) allowmaj = pkg['allowmaj'];\n if (!empty_or_null(pkg['exists_check'])) exists_check = pkg['exists_check'];\n if (reference &&\n _release &&\n rhel_decide_repo_relative_url_check(required_repo_url_list:repo_relative_urls) &&\n (applicable_repo_urls || (!exists_check || rpm_exists(release:_release, rpm:exists_check))) &&\n rpm_check(release:_release, sp:sp, cpu:_cpu, reference:reference, epoch:epoch, el_string:el_string, rpm_spec_vers_cmp:rpm_spec_vers_cmp, allowmaj:allowmaj)) flag++;\n }\n}\n\nif (flag)\n{\n var extra = NULL;\n if (empty_or_null(applicable_repo_urls)) extra = rpm_report_get() + redhat_report_repo_caveat();\n else extra = rpm_report_get() + redhat_report_package_caveat();\n security_report_v4(\n port : 0,\n severity : SECURITY_HOLE,\n extra : extra\n );\n exit(0);\n}\nelse\n{\n var tested = pkg_tests_get();\n if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);\n else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'kernel-rt / kernel-rt-core / kernel-rt-debug / kernel-rt-debug-core / etc');\n}\n", "cvss": {"score": 0.0, "vector": "NONE"}}, {"lastseen": "2023-05-17T16:37:57", "description": "The remote AlmaLinux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the ALSA-2022:7933 advisory.\n\n - An issue was discovered in the Linux kernel through 5.16.11. The mixed IPID assignment method with the hash-based IPID assignment policy allows an off-path attacker to inject data into a victim's TCP session or terminate that session. (CVE-2020-36516)\n\n - A flaw use-after-free in function sco_sock_sendmsg() of the Linux kernel HCI subsystem was found in the way user calls ioct UFFDIO_REGISTER or other way triggers race condition of the call sco_conn_del() together with the call sco_sock_sendmsg() with the expected controllable faulting memory page. A privileged local user could use this flaw to crash the system or escalate their privileges on the system.\n (CVE-2021-3640)\n\n - A denial of service (DOS) issue was found in the Linux kernel's smb2_ioctl_query_info function in the fs/cifs/smb2ops.c Common Internet File System (CIFS) due to an incorrect return from the memdup_user function. This flaw allows a local, privileged (CAP_SYS_ADMIN) attacker to crash the system.\n (CVE-2022-0168)\n\n - A flaw null pointer dereference in the Linux kernel UDF file system functionality was found in the way user triggers udf_file_write_iter function for the malicious UDF image. A local user could use this flaw to crash the system. Actual from Linux kernel 4.2-rc1 till 5.17-rc2. (CVE-2022-0617)\n\n - A memory leak flaw was found in the Linux kernel's DMA subsystem, in the way a user calls DMA_FROM_DEVICE.\n This flaw allows a local user to read random memory from the kernel space. (CVE-2022-0854)\n\n - A flaw was found in the Linux kernel in net/netfilter/nf_tables_core.c:nft_do_chain, which can cause a use-after-free. This issue needs to handle 'return' with proper preconditions, as it can lead to a kernel information leak problem caused by a local, unprivileged attacker. (CVE-2022-1016)\n\n - A use-after-free flaw was found in the Linux kernel's sound subsystem in the way a user triggers concurrent calls of PCM hw_params. The hw_free ioctls or similar race condition happens inside ALSA PCM for other ioctls. This flaw allows a local user to crash or potentially escalate their privileges on the system. (CVE-2022-1048)\n\n - A use-after-free flaw was found in fs/ext4/namei.c:dx_insert_block() in the Linux kernel's filesystem sub- component. This flaw allows a local attacker with a user privilege to cause a denial of service.\n (CVE-2022-1184)\n\n - A use-after-free vulnerability was found in drm_lease_held in drivers/gpu/drm/drm_lease.c in the Linux kernel due to a race problem. This flaw allows a local user privilege attacker to cause a denial of service (DoS) or a kernel information leak. (CVE-2022-1280)\n\n - A vulnerability was found in the pfkey_register function in net/key/af_key.c in the Linux kernel. This flaw allows a local, unprivileged user to gain access to kernel memory, leading to a system crash or a leak of internal kernel information. (CVE-2022-1353)\n\n - A use-after-free flaw was found in the Linux kernel's Atheros wireless adapter driver in the way a user forces the ath9k_htc_wait_for_target function to fail with some input messages. This flaw allows a local user to crash or potentially escalate their privileges on the system. (CVE-2022-1679)\n\n - A NULL pointer dereference flaw was found in the Linux kernel's KVM module, which can lead to a denial of service in the x86_emulate_insn in arch/x86/kvm/emulate.c. This flaw occurs while executing an illegal instruction in guest in the Intel CPU. (CVE-2022-1852)\n\n - A use after free in the Linux kernel File System notify functionality was found in the way user triggers copy_info_records_to_user() call to fail in copy_event_to_user(). A local user could use this flaw to crash the system or potentially escalate their privileges on the system. (CVE-2022-1998)\n\n - Product: AndroidVersions: Android kernelAndroid ID: A-224546354References: Upstream kernel (CVE-2022-20368)\n\n - Incomplete cleanup of multi-core shared buffers for some Intel(R) Processors may allow an authenticated user to potentially enable information disclosure via local access. (CVE-2022-21123)\n\n - Incomplete cleanup of microarchitectural fill buffers on some Intel(R) Processors may allow an authenticated user to potentially enable information disclosure via local access. (CVE-2022-21125)\n\n - Incomplete cleanup in specific special register write operations for some Intel(R) Processors may allow an authenticated user to potentially enable information disclosure via local access. (CVE-2022-21166)\n\n - KGDB and KDB allow read and write access to kernel memory, and thus should be restricted during lockdown.\n An attacker with access to a serial port could trigger the debugger so it is important that the debugger respect the lockdown mode when/if it is triggered. (CVE-2022-21499)\n\n - AMD: CVE-2022-23816 AMD CPU Branch Type Confusion (CVE-2022-23816)\n\n - Aliases in the branch predictor may cause some AMD processors to predict the wrong branch type potentially leading to information disclosure. (CVE-2022-23825)\n\n - An issue was discovered in fs/nfs/dir.c in the Linux kernel before 5.16.5. If an application sets the O_DIRECTORY flag, and tries to open a regular file, nfs_atomic_open() performs a regular lookup. If a regular file is found, ENOTDIR should occur, but the server instead returns uninitialized data in the file descriptor. (CVE-2022-24448)\n\n - kernel: nf_tables cross-table potential use-after-free may lead to local privilege escalation (CVE-2022-2586)\n\n - Non-transparent sharing of return predictor targets between contexts in some Intel(R) Processors may allow an authorized user to potentially enable information disclosure via local access. (CVE-2022-26373)\n\n - An integer coercion error was found in the openvswitch kernel module. Given a sufficiently large number of actions, while copying and reserving memory for a new action of a new flow, the reserve_sfa_size() function does not return -EMSGSIZE as expected, potentially leading to an out-of-bounds write access. This flaw allows a local user to crash or potentially escalate their privileges on the system. (CVE-2022-2639)\n\n - ems_usb_start_xmit in drivers/net/can/usb/ems_usb.c in the Linux kernel through 5.17.1 has a double free.\n (CVE-2022-28390)\n\n - The SUNRPC subsystem in the Linux kernel through 5.17.2 can call xs_xprt_free before ensuring that sockets are in the intended state. (CVE-2022-28893)\n\n - Improper Update of Reference Count vulnerability in net/sched of Linux Kernel allows local attacker to cause privilege escalation to root. This issue affects: Linux Kernel versions prior to 5.18; version 4.14 and later versions. (CVE-2022-29581)\n\n - Mis-trained branch predictions for return instructions may allow arbitrary speculative code execution under certain microarchitecture-dependent conditions. (CVE-2022-29900)\n\n - Intel microprocessor generations 6 to 8 are affected by a new Spectre variant that is able to bypass their retpoline mitigation in the kernel to leak arbitrary data. An attacker with unprivileged user access can hijack return instructions to achieve arbitrary speculative code execution under certain microarchitecture-dependent conditions. (CVE-2022-29901)\n\n - nfqnl_mangle in net/netfilter/nfnetlink_queue.c in the Linux kernel through 5.18.14 allows remote attackers to cause a denial of service (panic) because, in the case of an nf_queue verdict with a one-byte nfta_payload attribute, an skb_pull can encounter a negative skb->len. (CVE-2022-36946)\n\n - An issue was discovered in net/netfilter/nf_tables_api.c in the Linux kernel before 5.19.6. A denial of service can occur upon binding to an already bound chain. (CVE-2022-39190)\n\nNote that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.", "cvss3": {}, "published": "2022-11-19T00:00:00", "type": "nessus", "title": "AlmaLinux 9 : kernel-rt (ALSA-2022:7933)", "bulletinFamily": "scanner", "cvss2": {}, "cvelist": ["CVE-2020-36516", "CVE-2021-3640", "CVE-2022-0168", "CVE-2022-0617", "CVE-2022-0854", "CVE-2022-1016", "CVE-2022-1048", "CVE-2022-1184", "CVE-2022-1280", "CVE-2022-1353", "CVE-2022-1679", "CVE-2022-1852", "CVE-2022-1998", "CVE-2022-20368", "CVE-2022-21123", "CVE-2022-21125", "CVE-2022-21166", "CVE-2022-21499", "CVE-2022-23816", "CVE-2022-23825", "CVE-2022-24448", "CVE-2022-2586", "CVE-2022-26373", "CVE-2022-2639", "CVE-2022-28390", "CVE-2022-28893", "CVE-2022-29581", "CVE-2022-29900", "CVE-2022-29901", "CVE-2022-36946", "CVE-2022-39190"], "modified": "2022-12-13T00:00:00", "cpe": ["p-cpe:/a:alma:linux:kernel-rt", "p-cpe:/a:alma:linux:kernel-rt-core", "p-cpe:/a:alma:linux:kernel-rt-debug", "p-cpe:/a:alma:linux:kernel-rt-debug-core", "p-cpe:/a:alma:linux:kernel-rt-debug-devel", "p-cpe:/a:alma:linux:kernel-rt-debug-kvm", "p-cpe:/a:alma:linux:kernel-rt-debug-modules", "p-cpe:/a:alma:linux:kernel-rt-debug-modules-extra", "p-cpe:/a:alma:linux:kernel-rt-devel", "p-cpe:/a:alma:linux:kernel-rt-kvm", "p-cpe:/a:alma:linux:kernel-rt-modules", "p-cpe:/a:alma:linux:kernel-rt-modules-extra", "cpe:/o:alma:linux:9", "cpe:/o:alma:linux:9::nfv", "cpe:/o:alma:linux:9::realtime"], "id": "ALMA_LINUX_ALSA-2022-7933.NASL", "href": "https://www.tenable.com/plugins/nessus/167989", "sourceData": "#%NASL_MIN_LEVEL 80900\n##\n# (C) Tenable, Inc.\n#\n# The package checks in this plugin were extracted from\n# AlmaLinux Security Advisory ALSA-2022:7933.\n##\n\ninclude('compat.inc');\n\nif (description)\n{\n script_id(167989);\n script_version(\"1.5\");\n script_set_attribute(attribute:\"plugin_modification_date\", value:\"2022/12/13\");\n\n script_cve_id(\n \"CVE-2020-36516\",\n \"CVE-2021-3640\",\n \"CVE-2022-0168\",\n \"CVE-2022-0617\",\n \"CVE-2022-0854\",\n \"CVE-2022-1016\",\n \"CVE-2022-1048\",\n \"CVE-2022-1184\",\n \"CVE-2022-1280\",\n \"CVE-2022-1353\",\n \"CVE-2022-1679\",\n \"CVE-2022-1852\",\n \"CVE-2022-1998\",\n \"CVE-2022-2586\",\n \"CVE-2022-2639\",\n \"CVE-2022-20368\",\n \"CVE-2022-21123\",\n \"CVE-2022-21125\",\n \"CVE-2022-21166\",\n \"CVE-2022-21499\",\n \"CVE-2022-23816\",\n \"CVE-2022-23825\",\n \"CVE-2022-24448\",\n \"CVE-2022-26373\",\n \"CVE-2022-28390\",\n \"CVE-2022-28893\",\n \"CVE-2022-29581\",\n \"CVE-2022-29900\",\n \"CVE-2022-29901\",\n \"CVE-2022-36946\",\n \"CVE-2022-39190\"\n );\n script_xref(name:\"ALSA\", value:\"2022:7933\");\n script_xref(name:\"CEA-ID\", value:\"CEA-2022-0026\");\n\n script_name(english:\"AlmaLinux 9 : kernel-rt (ALSA-2022:7933)\");\n\n script_set_attribute(attribute:\"synopsis\", value:\n\"The remote AlmaLinux host is missing one or more security updates.\");\n script_set_attribute(attribute:\"description\", value:\n\"The remote AlmaLinux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the\nALSA-2022:7933 advisory.\n\n - An issue was discovered in the Linux kernel through 5.16.11. The mixed IPID assignment method with the\n hash-based IPID assignment policy allows an off-path attacker to inject data into a victim's TCP session\n or terminate that session. (CVE-2020-36516)\n\n - A flaw use-after-free in function sco_sock_sendmsg() of the Linux kernel HCI subsystem was found in the\n way user calls ioct UFFDIO_REGISTER or other way triggers race condition of the call sco_conn_del()\n together with the call sco_sock_sendmsg() with the expected controllable faulting memory page. A\n privileged local user could use this flaw to crash the system or escalate their privileges on the system.\n (CVE-2021-3640)\n\n - A denial of service (DOS) issue was found in the Linux kernel's smb2_ioctl_query_info function in the\n fs/cifs/smb2ops.c Common Internet File System (CIFS) due to an incorrect return from the memdup_user\n function. This flaw allows a local, privileged (CAP_SYS_ADMIN) attacker to crash the system.\n (CVE-2022-0168)\n\n - A flaw null pointer dereference in the Linux kernel UDF file system functionality was found in the way\n user triggers udf_file_write_iter function for the malicious UDF image. A local user could use this flaw\n to crash the system. Actual from Linux kernel 4.2-rc1 till 5.17-rc2. (CVE-2022-0617)\n\n - A memory leak flaw was found in the Linux kernel's DMA subsystem, in the way a user calls DMA_FROM_DEVICE.\n This flaw allows a local user to read random memory from the kernel space. (CVE-2022-0854)\n\n - A flaw was found in the Linux kernel in net/netfilter/nf_tables_core.c:nft_do_chain, which can cause a\n use-after-free. This issue needs to handle 'return' with proper preconditions, as it can lead to a kernel\n information leak problem caused by a local, unprivileged attacker. (CVE-2022-1016)\n\n - A use-after-free flaw was found in the Linux kernel's sound subsystem in the way a user triggers\n concurrent calls of PCM hw_params. The hw_free ioctls or similar race condition happens inside ALSA PCM\n for other ioctls. This flaw allows a local user to crash or potentially escalate their privileges on the\n system. (CVE-2022-1048)\n\n - A use-after-free flaw was found in fs/ext4/namei.c:dx_insert_block() in the Linux kernel's filesystem sub-\n component. This flaw allows a local attacker with a user privilege to cause a denial of service.\n (CVE-2022-1184)\n\n - A use-after-free vulnerability was found in drm_lease_held in drivers/gpu/drm/drm_lease.c in the Linux\n kernel due to a race problem. This flaw allows a local user privilege attacker to cause a denial of\n service (DoS) or a kernel information leak. (CVE-2022-1280)\n\n - A vulnerability was found in the pfkey_register function in net/key/af_key.c in the Linux kernel. This\n flaw allows a local, unprivileged user to gain access to kernel memory, leading to a system crash or a\n leak of internal kernel information. (CVE-2022-1353)\n\n - A use-after-free flaw was found in the Linux kernel's Atheros wireless adapter driver in the way a user\n forces the ath9k_htc_wait_for_target function to fail with some input messages. This flaw allows a local\n user to crash or potentially escalate their privileges on the system. (CVE-2022-1679)\n\n - A NULL pointer dereference flaw was found in the Linux kernel's KVM module, which can lead to a denial of\n service in the x86_emulate_insn in arch/x86/kvm/emulate.c. This flaw occurs while executing an illegal\n instruction in guest in the Intel CPU. (CVE-2022-1852)\n\n - A use after free in the Linux kernel File System notify functionality was found in the way user triggers\n copy_info_records_to_user() call to fail in copy_event_to_user(). A local user could use this flaw to\n crash the system or potentially escalate their privileges on the system. (CVE-2022-1998)\n\n - Product: AndroidVersions: Android kernelAndroid ID: A-224546354References: Upstream kernel\n (CVE-2022-20368)\n\n - Incomplete cleanup of multi-core shared buffers for some Intel(R) Processors may allow an authenticated\n user to potentially enable information disclosure via local access. (CVE-2022-21123)\n\n - Incomplete cleanup of microarchitectural fill buffers on some Intel(R) Processors may allow an\n authenticated user to potentially enable information disclosure via local access. (CVE-2022-21125)\n\n - Incomplete cleanup in specific special register write operations for some Intel(R) Processors may allow an\n authenticated user to potentially enable information disclosure via local access. (CVE-2022-21166)\n\n - KGDB and KDB allow read and write access to kernel memory, and thus should be restricted during lockdown.\n An attacker with access to a serial port could trigger the debugger so it is important that the debugger\n respect the lockdown mode when/if it is triggered. (CVE-2022-21499)\n\n - AMD: CVE-2022-23816 AMD CPU Branch Type Confusion (CVE-2022-23816)\n\n - Aliases in the branch predictor may cause some AMD processors to predict the wrong branch type potentially\n leading to information disclosure. (CVE-2022-23825)\n\n - An issue was discovered in fs/nfs/dir.c in the Linux kernel before 5.16.5. If an application sets the\n O_DIRECTORY flag, and tries to open a regular file, nfs_atomic_open() performs a regular lookup. If a\n regular file is found, ENOTDIR should occur, but the server instead returns uninitialized data in the file\n descriptor. (CVE-2022-24448)\n\n - kernel: nf_tables cross-table potential use-after-free may lead to local privilege escalation\n (CVE-2022-2586)\n\n - Non-transparent sharing of return predictor targets between contexts in some Intel(R) Processors may allow\n an authorized user to potentially enable information disclosure via local access. (CVE-2022-26373)\n\n - An integer coercion error was found in the openvswitch kernel module. Given a sufficiently large number of\n actions, while copying and reserving memory for a new action of a new flow, the reserve_sfa_size()\n function does not return -EMSGSIZE as expected, potentially leading to an out-of-bounds write access. This\n flaw allows a local user to crash or potentially escalate their privileges on the system. 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kernel: off-path attacker may inject data or terminate victim's TCP session (CVE-2020-36516)\n\n - kernel: use-after-free vulnerability in function sco_sock_sendmsg() (CVE-2021-3640)\n\n - kernel: smb2_ioctl_query_info NULL pointer dereference (CVE-2022-0168)\n\n - kernel: NULL pointer dereference in udf_expand_file_adinicbdue() during writeback (CVE-2022-0617)\n\n - kernel: swiotlb information leak with DMA_FROM_DEVICE (CVE-2022-0854)\n\n - kernel: uninitialized registers on stack in nft_do_chain can cause kernel pointer leakage to UM (CVE-2022-1016)\n\n - kernel: race condition in snd_pcm_hw_free leading to use-after-free (CVE-2022-1048)\n\n - kernel: KVM: cmpxchg_gpte can write to pfns outside the userspace region (CVE-2022-1158)\n\n - kernel: use-after-free and memory errors in ext4 when mounting and operating on a corrupted image (CVE-2022-1184)\n\n - kernel: concurrency use-after-free between drm_setmaster_ioctl and drm_mode_getresources (CVE-2022-1280)\n\n - kernel: kernel info leak issue in pfkey_register (CVE-2022-1353)\n\n - kernel: use-after-free in ath9k_htc_probe_device() could cause an escalation of privileges (CVE-2022-1679)\n\n - kernel: NULL pointer dereference in x86_emulate_insn may lead to DoS (CVE-2022-1852)\n\n - kernel: fanotify misuses fd_install() which could lead to use-after-free (CVE-2022-1998)\n\n - kernel: net/packet: slab-out-of-bounds access in packet_recvmsg() (CVE-2022-20368)\n\n - hw: cpu: incomplete clean-up of multi-core shared buffers (aka SBDR) (CVE-2022-21123)\n\n - hw: cpu: incomplete clean-up of microarchitectural fill buffers (aka SBDS) (CVE-2022-21125)\n\n - hw: cpu: incomplete clean-up in specific special register write operations (aka DRPW) (CVE-2022-21166)\n\n - kernel: possible to use the debugger to write zero into a location of choice (CVE-2022-21499)\n\n - CVE-2022-29900 hw: cpu: AMD: RetBleed Arbitrary Speculative Code Execution with Return Instructions (CVE-2022-23816)\n\n - hw: cpu: AMD: Branch Type Confusion (non-retbleed) (CVE-2022-23825)\n\n - kernel: nfs_atomic_open() returns uninitialized data instead of ENOTDIR (CVE-2022-24448)\n\n - kernel: nf_tables cross-table potential use-after-free may lead to local privilege escalation (CVE-2022-2586)\n\n - hw: cpu: Intel: Post-barrier Return Stack Buffer Predictions (CVE-2022-26373)\n\n - kernel: openvswitch: integer underflow leads to out-of-bounds write in reserve_sfa_size() (CVE-2022-2639)\n\n - kernel: double free in ems_usb_start_xmit in drivers/net/can/usb/ems_usb.c (CVE-2022-28390)\n\n - kernel: use after free in SUNRPC subsystem (CVE-2022-28893)\n\n - kernel: use-after-free due to improper update of reference count in net/sched/cls_u32.c (CVE-2022-29581)\n\n - CVE-2022-23816 hw: cpu: AMD: RetBleed Arbitrary Speculative Code Execution with Return Instructions (CVE-2022-29900)\n\n - hw: cpu: Intel: RetBleed Arbitrary Speculative Code Execution with Return Instructions (CVE-2022-29901)\n\n - kernel: DoS in nfqnl_mangle in net/netfilter/nfnetlink_queue.c (CVE-2022-36946)\n\n - kernel: nf_tables disallow binding to already bound chain (CVE-2022-39190)\n\nNote that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.", "cvss3": {}, "published": "2022-11-16T00:00:00", "type": "nessus", "title": "RHEL 9 : kernel (RHSA-2022:8267)", "bulletinFamily": "scanner", "cvss2": {}, "cvelist": ["CVE-2020-36516", "CVE-2021-3640", "CVE-2022-0168", "CVE-2022-0617", "CVE-2022-0854", "CVE-2022-1016", "CVE-2022-1048", "CVE-2022-1158", "CVE-2022-1184", "CVE-2022-1280", "CVE-2022-1353", "CVE-2022-1679", "CVE-2022-1852", "CVE-2022-1998", "CVE-2022-20368", "CVE-2022-21123", "CVE-2022-21125", "CVE-2022-21166", "CVE-2022-21499", "CVE-2022-23816", "CVE-2022-23825", "CVE-2022-24448", "CVE-2022-2586", "CVE-2022-26373", "CVE-2022-2639", "CVE-2022-28390", "CVE-2022-28893", "CVE-2022-29581", "CVE-2022-29900", "CVE-2022-29901", "CVE-2022-36946", "CVE-2022-39190"], "modified": "2023-05-25T00:00:00", "cpe": ["cpe:/o:redhat:enterprise_linux:9", "p-cpe:/a:redhat:enterprise_linux:bpftool", "p-cpe:/a:redhat:enterprise_linux:kernel", "p-cpe:/a:redhat:enterprise_linux:kernel-abi-stablelists", "p-cpe:/a:redhat:enterprise_linux:kernel-core", "p-cpe:/a:redhat:enterprise_linux:kernel-cross-headers", "p-cpe:/a:redhat:enterprise_linux:kernel-debug", "p-cpe:/a:redhat:enterprise_linux:kernel-debug-core", "p-cpe:/a:redhat:enterprise_linux:kernel-debug-devel", "p-cpe:/a:redhat:enterprise_linux:kernel-debug-devel-matched", "p-cpe:/a:redhat:enterprise_linux:kernel-debug-modules", "p-cpe:/a:redhat:enterprise_linux:kernel-debug-modules-extra", "p-cpe:/a:redhat:enterprise_linux:kernel-devel", "p-cpe:/a:redhat:enterprise_linux:kernel-devel-matched", "p-cpe:/a:redhat:enterprise_linux:kernel-headers", "p-cpe:/a:redhat:enterprise_linux:kernel-modules", "p-cpe:/a:redhat:enterprise_linux:kernel-modules-extra", "p-cpe:/a:redhat:enterprise_linux:ker
x86: Multiple speculative security issues
