Memory leak in Linux kernel - CVE-2026-31652
Published: April 25, 2026
Vulnerability identifier: #VU127747
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-2026-31652
CWE-ID: CWE-401
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 a memory leak in damon_stat_start() when handling repeated writes to the "enabled" control after damon_call() failure. A local user can write Y to the "enabled" interface again after a failed damon_call() to cause a denial of service.
The issue occurs because the previously allocated damon_ctx object remains allocated after the failure condition.
How to mitigate CVE-2026-31652
Install security update from vendor's repository.