CVE-2026-63844 drm/amdgpu/jpeg: set no_user_fence for JPEG v4.0.3 ring
The Linux kernel AMD GPU driver fails to reject unsupported user fence submissions, potentially causing system instability or crashes.
- 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-2026-63844?
CVE-2026-63844 is a high-severity 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/amdgpu/jpeg: set no_user_fence for JPEG v4.0.3 ring
JPEG rings do not support 64-bit user fence writes, reject CS submissions with user fences.
(cherry picked from commit 2f6afc97d259d530f4f86c7743efbc573a8da927)
Which versions are affected by CVE-2026-63844?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2026-63844?
Apply the vendor's patch.
Is CVE-2026-63844 being exploited?
There is no known exploitation of CVE-2026-63844 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2026-63844, DEBIAN-CVE-2026-63844, GHSA-9x48-m72f-7f2w, UBUNTU-CVE-2026-63844.