CVE-2026-68383 drm/xe/guc: Keep scheduler timeline name alive
A use-after-free vulnerability in the Linux kernel's Xe GPU driver allows attackers to potentially execute code or cause a system crash.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-68383?
CVE-2026-68383 is a high-severity use after free vulnerability in Linux, published on 10 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
drm/xe/guc: Keep scheduler timeline name alive
The scheduler keeps a pointer to the timeline name, but q->name is freed with the exec queue while scheduler fences can still reference it.
Store the name in struct xe_guc_exec_queue so it shares the scheduler's RCU-deferred lifetime.
(cherry picked from commit 41075f0eb5dcbd3b065d15f15ef7bbe9315188e8)
Weakness: CWE-416
Which versions are affected by CVE-2026-68383?
How do I fix CVE-2026-68383?
Apply the vendor's patch.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2026-68383 being exploited?
There is no known exploitation of CVE-2026-68383 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2026-68383, DEBIAN-CVE-2026-68383, GHSA-hf5h-j5wg-pf5g, UBUNTU-CVE-2026-68383.