SB2026042566 - Memory leak in Linux kernel damon

Description

This security bulletin contains information about 1 vulnerability.

1) Memory leak (CVE-ID: CVE-2026-31653)

CWE-ID: CWE-401 - Missing release of memory after effective lifetime

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear

The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to a memory leak in DAMON_SYSFS repeat_call_control handling when damon_call() fails after the monitored virtual address process terminates. A local user can cause the monitored process to terminate before damon_call() is invoked to cause a denial of service.

The issue occurs when a DAMON context is created for monitoring a virtual address process and that process exits immediately before the call is made.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/0199390a6b92fc21860e1b858abf525c7e73b956
• https://git.kernel.org/stable/c/0655f5cf1735508394ef8af98ddcfab3ac1c1cc5
• https://git.kernel.org/stable/c/b9dadf026a9fb681ed32a0646adc10ab485bf3b1