CVE-2026-90286 drm/amdgpu/gfx6: Use PFP on the compute queues too
A synchronization bug in the AMDGPU driver for GFX6 hardware could lead to undefined behavior or instability in compute queue operations.
- 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-2026-90286?
CVE-2026-90286 is a high-severity vulnerability in Linux, published on 17 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/amdgpu/gfx6: Use PFP on the compute queues too
On GFX6, the compute rings use the same CP path as the graphics ring. The only difference is that they don't support draw commands. (As opposed to GFX7 and newer which have a separate command parser that is called MEC for compute queues.)
This means that we have to take into consideration that the PFP also exists on compute queues on GFX6:
Use PFP for register writes on both graphics and compute queues.
In the pipeline sync, use the PFP to wait for the previous fence (and not the ME) to prevent the PFP from starting to execute the next submission while the ME is still in the previous submission.
After a VM flush, emit PFP_SYNC_ME on compute queues as well.
Which versions are affected by CVE-2026-90286?
How do I fix CVE-2026-90286?
Apply the vendor's patch.
Is CVE-2026-90286 being exploited?
There is no known exploitation of CVE-2026-90286 in the wild and no public exploit code.
Sources
Also known as AZL-102119, BELL-CVE-2026-90286, DEBIAN-CVE-2026-90286, GHSA-v695-f62m-x7j7, UBUNTU-CVE-2026-90286.