Improper locking in Linux kernel - CVE-2025-71296
Published: May 9, 2026
Vulnerability identifier: #VU130905
CSH Severity: Low
CVSS v4.0: 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/E:U/U:Clear
CVE-ID: CVE-2025-71296
CWE-ID: CWE-667
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 user to cause a denial of service.
The vulnerability exists due to improper locking in drm/tests shmem purge handling when running KUnit shmem tests. A local user can trigger the purge operation without the required reservation lock to cause a denial of service.
The issue is limited to KUnit test code and is not an interface for regular drivers.
How to mitigate CVE-2025-71296
Install security update from vendor's repository.