CVE-2026-64417

A flaw was found in the Linux kernel's memory management (mm) shrinker subsystem. This vulnerability arises because the shrinker_debugfs_add() function unconditionally creates debugfs files for 'count' and 'scan' operations, even if the corresponding callback functions (like scan_objects()) are not implemented by a specific shrinker. A local attacker could trigger a NULL pointer dereference by attempting to write to a scan file associated with a shrinker that has a missing scan_objects() callback. This can lead to a kernel panic, effectively causing a denial of service (DoS) on the system.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.