8844 matches found
kernel: Improper handling of VM_IO|VM_PFNMAP vmas in KVM can bypass RO checks
A flaw was found in the Linux kernel’s KVM implementation, where improper handing of the VMIO|VMPFNMAP VMAs in KVM bypasses RO checks and leads to pages being freed while still accessible by the VMM and guest. This flaw allows users who can start and control a VM to read/write random pages of...
Important: Red Hat Security Advisory: edk2 security update
An update for edk2 is now available for Red Hat Enterprise Linux 8.1 Extended Update Support. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available for ea...
CVE-2021-3653
A flaw was found in the KVM's AMD code for supporting SVM nested virtualization. The flaw occurs when processing the VMCB virtual machine control block provided by the L1 guest to spawn/handle a nested guest L2. Due to improper validation of the "intctl" field, this issue could allow a malicious ...
CVE-2021-3656
A flaw was found in the KVM's AMD code for supporting SVM nested virtualization. The flaw occurs when processing the VMCB virtual machine control block provided by the L1 guest to spawn/handle a nested guest L2. Due to improper validation of the "virtext" field, this issue could allow a malicious...
CVE-2021-3656
A flaw was found in the KVM's AMD code for supporting SVM nested virtualization. The flaw occurs when processing the VMCB virtual machine control block provided by the L1 guest to spawn/handle a nested guest L2. Due to improper validation of the "virtext" field, this issue could allow a malicious...
CVE-2021-3653
A flaw was found in the KVM's AMD code for supporting SVM nested virtualization. The flaw occurs when processing the VMCB virtual machine control block provided by the L1 guest to spawn/handle a nested guest L2. Due to improper validation of the "intctl" field, this issue could allow a malicious ...
Important: kernel
Issue Overview: A flaw was found in the Linux kernel's KVM implementation, where improper handing of the VMIO|VMPFNMAP VMAs in KVM bypasses RO checks and leads to pages being freed while still accessible by the VMM and guest. This flaw allows users who can start and control a VM to read/write...
Unbreakable Enterprise kernel security update
5.4.17-2102.204.4.3 - KVM: nSVM: always intercept VMLOAD/VMSAVE when nested Maxim Levitsky Orabug: 33205365 CVE-2021-3656 CVE-2021-3656 - KVM: nSVM: avoid picking up unsupported bits from L2 in intctl Maxim Levitsky Orabug: 33205443 CVE-2021-3653 CVE-2021-3653...
Unbreakable Enterprise kernel-container security update
4.14.35-2047.506.10.el7 - Revert 'rds/ib: reap tx completions during connection shutdown' Manjunath Patil Orabug: 33220435 - Revert 'rds/ib: handle posted ACK during connection shutdown' Manjunath Patil Orabug: 33220435 - Revert 'rds/ib: recover rds connection from interrupt loss scenario'...
Unbreakable Enterprise kernel security update
4.14.35-2047.506.10 - Revert 'rds/ib: reap tx completions during connection shutdown' Manjunath Patil Orabug: 33220435 - Revert 'rds/ib: handle posted ACK during connection shutdown' Manjunath Patil Orabug: 33220435 - Revert 'rds/ib: recover rds connection from interrupt loss scenario' Manjunath...
Oracle Linux 7 : Unbreakable Enterprise kernel-container (ELSA-2021-9422)
The remote Oracle Linux 7 host has a package installed that is affected by multiple vulnerabilities as referenced in the ELSA-2021-9422 advisory. - KVM: nSVM: always intercept VMLOAD/VMSAVE when nested Maxim Levitsky Orabug: 33205367 CVE-2021-3656 Tenable has extracted the preceding description...
Oracle Linux 7 / 8 : Unbreakable Enterprise kernel-container (ELSA-2021-9421)
The remote Oracle Linux 7 / 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2021-9421 advisory. - KVM: nSVM: always intercept VMLOAD/VMSAVE when nested Maxim Levitsky Orabug: 33205365 CVE-2021-3656 Tenable has extracted the preceding descripti...
Oracle Linux 7 : Unbreakable Enterprise kernel (ELSA-2021-9419)
The remote Oracle Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2021-9419 advisory. - KVM: nSVM: always intercept VMLOAD/VMSAVE when nested Maxim Levitsky Orabug: 33205367 CVE-2021-3656 CVE-2021-3656 Tenable has extracted the preceding...
Oracle Linux 7 / 8 : Unbreakable Enterprise kernel (ELSA-2021-9420)
The remote Oracle Linux 7 / 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2021-9420 advisory. - KVM: nSVM: always intercept VMLOAD/VMSAVE when nested Maxim Levitsky Orabug: 33205365 CVE-2021-3656 CVE-2021-3656 Tenable has extracted the...
Security update for the Linux Kernel (important)
openSUSE Security Update: Security update for the Linux Kernel Announcement ID: openSUSE-SU-2021:2687-1 Rating: important References: 1065729 1085224 1094840 1113295 1152472 1152489 1153274 1154353 1155518 1156395 1170511 1176447 1176940 1179243 1180092 1180814 1183871 1184114 1184350 1184631...
SUSE SLES15: cluster-md-kmp-rt / dlm-kmp-rt / gfs2-kmp-rt / kernel-devel-rt / etc (SUSE-SU-2021:2678-1)
The remote SUSE Linux SLES15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2021:2678-1 advisory. The SUSE Linux Enterprise 15 SP2 RT kernel was updated to receive various security and bugfixes. The following security bugs were fixed: -...
Privilege Escalation
linux-kvm is vulnerable to privilege escalation. The vulnerability exists due to the lack of proper validation of user-supplied eBPF programs prior to executing...
arch/x86/kvm/svm/nested.c in the Linux kernel before 5.11.12 has a use-after-free in which an AMD KVM guest can bypass access control on host OS MSRs when there are nested guests aka CID-a58d9166a756. This occurs because of a TOCTOU race condition associated with a VMCB12 double fetch in nested_svm_vmrun.
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The vulnerability of the rtas_args.nargs function in the arch/powerpc/kvm/book3s_rtas.c driver of the Linux operating system allows a attacker to trigger memory corruption on the host operating system.
The vulnerability of the rtasargs.nargs function in the arch/powerpc/kvm/book3srtas.c driver of the Linux operating system is related to the possibility of writing outside the specified field. Exploiting this vulnerability could allow an attacker to cause damage to the host’s operating system’s...
