CVE-2026-80903 drm/xe/oa: Fix sync entry leak on OA config emit failure
A memory leak in the Linux kernel's Xe GPU driver allows local attackers to exhaust kernel memory, causing denial of service.
- 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-2026-80903?
CVE-2026-80903 is a memory corruption vulnerability in Linux, published on 4 Sep 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/oa: Fix sync entry leak on OA config emit failure
xe_oa_emit_oa_config() releases the sync entries and the syncs array only on its success path. When it fails before the point of no return (fence allocation, config buffer allocation or batch submission), it returns without touching stream->syncs.
The stream open path handles such failures in the caller, but xe_oa_config_locked() propagates the error without any cleanup, so the syncs array and the fence references held by the parsed entries are leaked. The next config ioctl overwrites stream->syncs, making the memory unreachable for good.
Clean up the parsed syncs when xe_oa_emit_oa_config() fails, matching the cleanup done by the stream open error path.
(cherry picked from commit 8af97b3da2cfce04e6b457c6eb17ed3c1daf912b)
Which versions are affected by CVE-2026-80903?
How do I fix CVE-2026-80903?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-80903 being exploited?
There is no known exploitation of CVE-2026-80903 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2026-80903, DEBIAN-CVE-2026-80903, GHSA-xqfj-m7qf-gr42, UBUNTU-CVE-2026-80903.