CVE-2026-63840 drm/amdgpu/jpeg: set no_user_fence for JPEG v5.3.0 ring
Attackers can cause a denial of service by submitting invalid command streams to the AMD GPU JPEG driver, requiring kernel patches.
- 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-2026-63840?
CVE-2026-63840 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 v5.3.0 ring
JPEG rings do not support 64-bit user fence writes, reject CS submissions with user fences.
(cherry picked from commit 86ac011ae234c03fb872f4945913391ea1d8862e)
Weakness: CWE-20
Which versions are affected by CVE-2026-63840?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2026-63840?
Apply the vendor's patch.
Is CVE-2026-63840 being exploited?
There is no known exploitation of CVE-2026-63840 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as DEBIAN-CVE-2026-63840, GHSA-9f56-6f5c-c8vx, UBUNTU-CVE-2026-63840.