SB20260815254 - Race condition in Linux kernel apparmor

Description

This security bulletin contains information about 1 vulnerability.

1) Race condition (CVE-ID: CVE-2026-72462)

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 race condition in AppArmor unix socket mediation in security/apparmor/af_unix.c when accessing the peer socket path during permission checks. A local user can trigger concurrent unix socket operations to cause a denial of service.

The issue occurs when peer_path is used for unix domain socket mediation.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/b1aea2c1960771a276d7e68c7424168eccd0c3da
• https://git.kernel.org/stable/c/d680472db98823d90fc91362910901e468269318
• https://git.kernel.org/stable/c/d8ea44f6090c087fe255d9512fb808574b4d88e8