SB2026070271 - NULL pointer dereference in Linux kernel damon

Description

This security bulletin contains information about 1 vulnerability.

1) NULL pointer dereference (CVE-ID: CVE-2026-53334)

CWE-ID: CWE-476 - NULL Pointer Dereference

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/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 NULL pointer dereference in damon_reclaim_enabled_store() in mm/damon/reclaim.c when handling DAMON_RECLAIM enablement after damon_ctx allocation failure. A local user can trigger the vulnerable code path to cause a denial of service.

The issue occurs only if allocation of the damon_ctx object fails before the affected code path is reached.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/635b45ce61de53a9357e28ac97461428cdb650f0
• https://git.kernel.org/stable/c/66bc00ea37fa8ec14be5a3909d067a5967ef234b
• https://git.kernel.org/stable/c/7e2ed8a29427af534bf2cb9b8bc51762b8b6e654