CVE-2023-46840

CVE-2023-46840 concerns Xen where an incorrect placement of a preprocessor directive in Xen source leads to logic that does not operate as intended when HVM guest support is compiled out. The vulnerability is described across multiple connected advisories (e.g., Nessus/OPENVAS entries and OSV/nvd...

CVE-2023-46840 VT-d: Failure to quarantine devices in !HVM builds

Incorrect placement of a preprocessor directive in source code results in logic that doesn't operate as intended when support for HVM guests is compiled out of Xen...

CVE-2023-46840

Incorrect placement of a preprocessor directive in source code results in logic that doesn't operate as intended when support for HVM guests is compiled out of Xen...

SUSE SLED15: xen / xen-devel / xen-doc-html / xen-libs / xen-libs-32bit / etc (SUSE-SU-2024:0830-1)

The remote SUSE Linux SLED15 / SLEDSAP15 / SLES15 / SLESSAP15 / openSUSE 15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2024:0830-1 advisory. - CVE-2023-46839: Fixed memory access through PCI device with phantom functions XSA-449...

x86: shadow stack vs exceptions from emulation stubs

ISSUE DESCRIPTION Recent x86 CPUs offer functionality named Control-flow Enforcement Technology CET. A sub-feature of this are Shadow Stacks CET-SS. CET-SS is a hardware feature designed to protect against Return Oriented Programming attacks. When enabled, traditional stacks holding both data and...

SUSE CVE-2023-46840

Incorrect placement of a preprocessor directive in source code results in logic that doesn't operate as intended when support for HVM guests is compiled out of Xen...

SUSE-SU-2024:0266-1 Security update for xen

This update for xen fixes the following issues: - CVE-2023-46839: Fixed phantom functions assigned to incorrect contexts XSA-449 bsc1218851 - CVE-2023-46840: Fixed VT-d: Failure to quarantine devices in !HVM builds XSA-450 bsc1219080...

VT-d: Failure to quarantine devices in !HVM builds

ISSUE DESCRIPTION Incorrect placement of a preprocessor directive in source code results in logic that doesn't operate as intended when support for HVM guests is compiled out of Xen. IMPACT When a device is removed from a domain, it is not properly quarantined and retains its access to the domain...

CVE-2023-34328

This CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE. AMD CPUs since 2014 have extensions to normal x86 debugging functionality. Xen supports guests using these extensions. Unfortunately there are errors in Xen's handling of...

UBUNTU-CVE-2023-34328

This CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE. AMD CPUs since 2014 have extensions to normal x86 debugging functionality. Xen supports guests using these extensions. Unfortunately there are errors in Xen's handling of...

SUSE SLES15: xen / xen-devel / xen-libs / xen-tools / xen-tools-domU / etc (SUSE-SU-2023:4183-1)

The remote SUSE Linux SLES15 / SLESSAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2023:4183-1 advisory. - CVE-2023-34323: Fixed a potential crash in C Xenstored due to an incorrect assertion XSA-440 bsc1215744. - CVE-2023-34326: Fixed ...

Xen: x86/AMD: Debug Mask handling (XSA-444)

AMD CPUs since 2014 have extensions to normal x86 debugging functionality. Xen supports guests using these extensions. Unfortunately there are errors in Xen's handling of the guest state, leading to denials of service. - CVE-2023-34327 - An HVM vCPU can end up operating in the context of a previo...

x86/AMD: Debug Mask handling

ISSUE DESCRIPTION AMD CPUs since 2014 have extensions to normal x86 debugging functionality. Xen supports guests using these extensions. Unfortunately there are errors in Xen's handling of the guest state, leading to denials of service. 1 CVE-2023-34327 - An HVM vCPU can end up operating in the...

Mishandling of guest SSBD selection on AMD hardware

ISSUE DESCRIPTION The current logic to set SSBD on AMD Family 17h and Hygon Family 18h processors requires that the setting of SSBD is coordinated at a core level, as the setting is shared between threads. Logic was introduced to keep track of how many threads require SSBD active in order to...

Mis-handling Cache Attributes

xen is vulnerable to Mis-handling Cache Attributes. The vulnerability allows entities controlling HVM guests to run the host out of resources or stall execution of a physical CPU for effectively unbounded periods of time which could lead to a denial of service to the affected users...

x86 shadow paging arbitrary pointer dereference

ISSUE DESCRIPTION In environments where host assisted address translation is necessary but Hardware Assisted Paging HAP is unavailable, Xen will run guests in so called shadow mode. Due to too lax a check in one of the hypervisor routines used for shadow page handling it is possible for a guest...

Fedora 36 : xen (2023-04b5338dd0)

The remote Fedora 36 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2023-04b5338dd0 advisory. 3 security issues 2180425 x86 shadow plus log-dirty mode use-after-free XSA-427, CVE-2022-42332 x86/HVM pinned cache attributes mis-handling XSA-428...

Fedora 38 : xen (2023-703f133eb3)

The remote Fedora 38 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2023-703f133eb3 advisory. 3 security issues 2180425 x86 shadow plus log-dirty mode use-after-free XSA-427, CVE-2022-42332 x86/HVM pinned cache attributes mis-handling XSA-428...

SUSE CVE-2022-42333

x86/HVM pinned cache attributes mis-handling This CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE. To allow cachability control for HVM guests with passed through devices, an interface exists to explicitly override defaults...

SUSE SLED15: xen / xen-devel / xen-doc-html / xen-libs / xen-libs-32bit / etc (SUSE-SU-2023:0848-1)

The remote SUSE Linux SLED15 / SLEDSAP15 / SLES15 / SLESSAP15 / openSUSE 15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2023:0848-1 advisory. - CVE-2022-42332: Fixed use-after-free in x86 shadow plus log-dirty mode bsc1209017. -...