SB20260626197 - Race condition in Linux kernel mm

Description

This security bulletin contains information about 1 vulnerability.

1) Race condition (CVE-ID: CVE-2026-53153)

CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear

The vulnerability allows a local user to cause memory corruption.

The vulnerability exists due to a race condition in memcg_reparent_list_lrus() in mm/list_lru.c when reparenting list lru entries for a dying memory cgroup during concurrent list_lru operations. A local user can trigger concurrent list_lru activity to cause memory corruption.

The issue occurs because different threads may modify the same physical list under different per-node locks during the reparenting window.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/2b66496d794e98f7aeec7688573051f22ec40bac
• https://git.kernel.org/stable/c/98733f3f0becb1ae0701d021c1748e974e5fa55c
• https://git.kernel.org/stable/c/c19ff4351214f059349788e13e70e74325831ff6