kernel: drm: Fix potential null-ptr-deref in drm_vblank_destroy_worker()

A flaw was found in the DRM subsystem in the Linux kernel. A NULL pointer dereference can be triggered due to a missing check, causing a system crash and resulting in a denial of service...

PT-2025-18544

Name of the Vulnerable Software and Affected Versions Linux kernel versions prior to the fixed version Description A potential null pointer dereference issue has been identified in the Linux kernel, specifically in the drm vblank destroy worker function. This issue arises when drm vblank init cal...