Race condition in Linux kernel - CVE-2026-64418
Published: July 27, 2026
Vulnerability identifier: #VU139553
CSH Severity: Low
CVSS v4: 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]
CVE-ID: CVE-2026-64418
CWE-ID: CWE-362
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to a race condition leading to use-after-free or double-free in shrinker_info teardown in mm/shrinker.c when handling memcg shrinker_info expansion and teardown during memory cgroup online and shrinker allocation operations. A local user can trigger concurrent memory cgroup and shrinker operations to cause a denial of service.
The issue occurs when a partially initialized or already published shrinker_info array remains visible to iteration during teardown.
Affected software
Linux kernel
How to mitigate CVE-2026-64418
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3