CVE-2026-68382

Technical Description

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

drm/xe/guc: Hold device ref until queue teardown completes

GuC exec queue destruction can run asynchronously. If the final device

put happens from a destroy worker, drmm cleanup can end up draining

the same workqueue and deadlock.

Hold a drm_device reference for the queue lifetime and drop it after

queue teardown completes. This keeps drmm cleanup from running while

async destroy work is still pending.

Move GuC destroy work to a module-lifetime Xe workqueue and flush it

on PCI remove so hot-unbind/rebind still waits for pending destroy work.

With queue-held device refs, guc_submit_sw_fini() cannot run with live

GuC IDs. Replace the fini wait with an assertion and remove the unused

fini_wq.

v2:

- Rebase

v3:

- Switch to queue-lifetime drm_dev_get()/drm_dev_put() model. (Matt)

- Queue async teardown on system_dfl_wq instead of xe->destroy_wq. (Matt)

- Drop separate deferred drm_dev_put worker.

- Remove st

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References