CVE-2026-68364

Summary

In the Linux kernel, the following vulnerability has been resolved:

drm/amd/display: Fix ISM dc_lock deadlock during suspend

[Why] System hang observed during suspend/resume while video is playing. amdgpu_dm_ism_disable() is called under dc_lock and waits for ISM delayed work via disable_delayed_work_sync(). The work handlers themselves take dc_lock, 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. amdgpu_dm_ism_disable() – quiesces workers, must NOT hold dc_lock.
  2. amdgpu_dm_ism_force_full_power() (new) – drives the ISM FSM back to FULL_POWER_RUNNING, must hold dc_lock.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 95776812e6b8f908563e8994d5d947b68baf68a6affected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 3714fe242592e3699ac5e2c19d68b275a210be7daffected
LinuxLinux0 < 7.1.6affected
LinuxLinux7.1.6 <= 7.1.*unaffected
LinuxLinux7.2-rc1 <= *unaffected

Weaknesses

References