Improper locking in Linux kernel - CVE-2026-53125
Published: June 25, 2026
Vulnerability identifier: #VU135164
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-2026-53125
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 lock handling in md_attr_store() when processing a write of "clear" to the array_state sysfs attribute. A local user can write "clear" to the array_state sysfs entry to cause a denial of service.
The issue is triggered during md array teardown from the sysfs write path and results in recursive locking on kn->active.
How to mitigate CVE-2026-53125
Install security update from vendor's repository.