Race condition in Linux kernel - CVE-2026-89752
Published: September 12, 2026
Vulnerability identifier: #VU149043
CSH Severity: Low
CVSS v4: 2 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-89752
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 in the memory.high and memory.max limit update handlers when concurrently updating memory cgroup limits through separate open files. A local user can lower a memory.max limit and restore it through another open file to cause a denial of service.
Exploitation requires a cgroup populated with anonymous memory and swapping disabled.
Affected software
Linux kernel
How to mitigate CVE-2026-89752
Install security update from vendor's repository.