PT-2023-2381 · Linux+8 · Linux Kernel+8
Reima Ishii
·
Published
2023-03-14
·
Updated
2025-03-19
·
CVE-2023-30456
CVSS v3.1
6.5
Medium
| Vector | AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H |
Name of the Vulnerable Software and Affected Versions
Linux kernel versions prior to 6.2.8
Description
An issue was discovered in the Linux kernel related to the lack of consistency checks for CR0 and CR4 in nVMX on x86 64. This issue is associated with the function nested vmx check guest state() in the arch/x86/kvm/vmx/nested.c module of the KVM subsystem. Exploitation of this issue may allow an attacker to cause a denial of service in the guest operating system.
Recommendations
For versions prior to 6.2.8, update to version 6.2.8 or later to resolve the issue. As a temporary workaround, consider restricting the use of the nested vmx check guest state() function until a patch is available.
Fix
Improper Check for Exceptional Conditions
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Related Identifiers
Affected Products
Alt Linux
Almalinux
Astra Linux
Centos
Linuxmint
Linux Kernel
Red Hat
Suse
Ubuntu