SB20260816201 - Use-after-free in Linux kernel audit_del_rule()
Published: August 16, 2026
Security Bulletin ID
SB20260816201
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) Use-after-free (CVE-ID: CVE-2026-74512)
CWE-ID: CWE-416 - Use After Free
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 use-after-free in audit_del_rule() when deleting audit rules while concurrent readers access RCU-visible filter lists. A local user can trigger rule deletion during concurrent access to cause a denial of service.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/246df90b5f1a8a6e6abbd2f058b029558720adec
- https://git.kernel.org/stable/c/45bf3df5b32e5a49953e7ceabc55f7dd85380e46
- https://git.kernel.org/stable/c/5b8f46864f06d6dbacb7dcea52bc084dfd122638
- https://git.kernel.org/stable/c/78bde7e9bd36eaae1b8e8cfcd47f12a34f301dbf
- https://git.kernel.org/stable/c/cae0dfed5d307b240bff71c3cf206652d1b6f215