SB20260727138 - Race condition in Linux kernel audit_queue handling in kernel/audit.c
Published: July 27, 2026
Security Bulletin ID
SB20260727138
CSH 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 vulnerability.
1) Race condition (CVE-ID: CVE-2026-64435)
CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to a data race in audit_queue handling in kernel/audit.c when reading queue length concurrently with queue updates. A local user can trigger audit activity to cause a denial of service.
The issue affects multiple lockless readers of the audit queue length in the audit subsystem.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/69f98fff30bdaa72b0cb0e7e078ab6456a0a59b0
- https://git.kernel.org/stable/c/7ff42312ccde549f8c698723822c7db35107a39b
- https://git.kernel.org/stable/c/a3d85dec60bb0622360fc176b2a51abdbe2ff0ad
- https://git.kernel.org/stable/c/b35597bdae1a5d8395da4b9baa993b9b71f74d68
- https://git.kernel.org/stable/c/c5186201fa7030289cc4fe23fae87a3fcb566856
- https://git.kernel.org/stable/c/c9a71daaecb2fb1d8c704545cc0b1c920b9bf5d7
- https://git.kernel.org/stable/c/e575dabb805252e3113fdc3f56f6ecacfde422d0
- https://git.kernel.org/stable/c/fe997a84a385f840b593ead92e575503a5046cee