Race condition in Linux kernel - CVE-2026-53162
Published: June 26, 2026
Vulnerability identifier: #VU135626
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-53162
CWE-ID: CWE-362
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local attacker to cause memory corruption.
The vulnerability exists due to memory corruption in refill_stock in mm/memcontrol.c when memcg charge draining occurs in nmi context. A local attacker can trigger re-entry into the random subsystem during an NMI to cause memory corruption.
The issue occurs because get_random_u32_below() is not reentrant- or NMI-safe and may corrupt per-cpu ChaCha batch state during a mid-update recursion.
How to mitigate CVE-2026-53162
Install security update from vendor's repository.