CVE-2026-64100

Name of the Vulnerable Software and Affected Versions Linux kernel version 7.0.0

Description A circular locking dependency exists in the drm/msm component of the Linux kernel. When VM reclaim pressure occurs, the kswapd0 process holding the fs reclaim lock calls the MSM shrinker, which subsequently attempts to acquire the reservation ww class acquire lock. This sequence can lead to a deadlock because the locking chain involves a dependency where reservation ww class acquire depends on reservation ww class mutex, which in turn depends on fs reclaim. The issue is triggered within the msm gem shrinker scan() function.

Recommendations Update the Linux kernel to a version where the msm gem shrinker scan() function is updated to use dma resv trylock() instead of the standard lock to prevent the circular dependency.