CVE-2026-68364: drm/amd/display: Fix ISM dc_lock deadlock during suspend
In the Linux kernel, the following vulnerability has been resolved:
drm/amd/display: Fix ISM dclock deadlock during suspend
[Why] System hang observed during suspend/resume while video is playing. amdgpudmismdisable() is called under dclock and waits for ISM delayed work via disabledelayedworksync(). The work handlers themselves take dclock, producing an ABBA deadlock when a worker is in flight at suspend time.
[How] Split the disable path into two phases with opposite locking contracts: 1. amdgpudmismdisable() -- quiesces workers, must NOT hold dclock. 2. amdgpudmismforcefullpower() (new) -- drives the ISM FSM back to FULLPOWERRUNNING, must hold dclock.
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2026-68364?
CVE-2026-68364 has a risk rating of 23, indicating a moderate severity level.
What does CVE-2026-68364 address?
CVE-2026-68364 addresses a deadlock issue in the Linux kernel related to ISM dc_lock during system suspend.
How do I fix CVE-2026-68364?
To fix CVE-2026-68364, update your Linux kernel to the latest version where this vulnerability is resolved.
What impact does CVE-2026-68364 have on my system?
CVE-2026-68364 can cause system hangs during suspend/resume if video is playing, affecting system stability.
When was CVE-2026-68364 published?
CVE-2026-68364 was published on August 10, 2026.