CVE-2026-64021 drm/xe/oa: Fix exec_queue leak on width check in stream open
A memory leak in the Linux kernel's Xe GPU driver allows local attackers to exhaust system resources, 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-2026-64021?
CVE-2026-64021 is a medium-severity memory corruption vulnerability in Linux kernel, published on 19 Jul 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 exec_queue leak on width check in stream open
In xe_oa_stream_open_ioctl(), when param.exec_q->width > 1 the function returns -EOPNOTSUPP directly, skipping the existing err_exec_q cleanup path. The exec_queue reference obtained by xe_exec_queue_lookup() is leaked.
The exec queue holds a reference on the xe_file, which is only dropped during queue teardown. The leaked lookup ref is not on the file's exec_queue xarray, so file close cannot release it. This keeps both the exec queue and the file private state pinned indefinitely.
Jump to err_exec_q instead of returning directly so the reference is released.
(cherry picked from commit 339fa0be9e4a5d69fa47e91f4a36574224fb478f)
Weakness: CWE-401
Which versions are affected by CVE-2026-64021?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2026-64021?
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-2026-64021 being exploited?
There is no known exploitation of CVE-2026-64021 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2026-64021, DEBIAN-CVE-2026-64021, GHSA-gwpc-cvf2-g3x5, UBUNTU-CVE-2026-64021.