CVE-2026-68364

A flaw was found in the drm/amd/display component of the Linux kernel. A deadlock can occur during system suspend and resume operations when video is actively playing. This issue arises due to conflicting locking mechanisms within the display driver, where a function attempting to disable a component waits for delayed work that itself tries to acquire the same lock. This can lead to a system hang, resulting in a Denial of Service (DoS) for the affected system.

This issue affects AMDGPU display ISM during suspend. amdgpu_dm_ism_disable() holds dc_lock while waiting for delayed work, deadlocking suspend. Systems without AMD GPUs are not affected.

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.