SB20260114164 - Improper locking in Linux kernel x86 kvm
Published: January 14, 2026
Security Bulletin ID
SB20260114164
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Improper locking (CVE-ID: CVE-2025-71104)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to improper locking within the advance_periodic_target_expiration() function in arch/x86/kvm/lapic.c. A local user can perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/18ab3fc8e880791aa9f7c000261320fc812b5465
- https://git.kernel.org/stable/c/7b54ccef865e0aa62e4871d4ada2ba4b9dcb8bed
- https://git.kernel.org/stable/c/807dbe8f3862fa7c164155857550ce94b36a11b9
- https://git.kernel.org/stable/c/e23f46f1a971c73dad2fd63e1408696114ddebe2
- https://git.kernel.org/stable/c/e746e51947053a02af2ea964593dc4887108d379