CVE-2026-89813 drm/amdgpu: force complete the KIQ ring fences on reset
A flaw in the Linux kernel's amdgpu driver causes a denial of service during GPU reset due to incomplete fence handling.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-89813?
CVE-2026-89813 is a denial of service vulnerability in Linux, published on 16 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: force complete the KIQ ring fences on reset
Like the MES scheduler ring, the KIQ ring sets no_scheduler = true and uses a polling fence, so it is skipped by the force-completion loop in amdgpu_device_pre_asic_reset(). Its hw fence value lives in wb (GTT) memory and survives a MODE1 reset while fence_drv.sync_seq keeps advancing, so after a reset the first KIQ submission can poll forever on a seq that is never written back.
Force complete the KIQ ring fences too so their hw fence is realigned to sync_seq.
Which versions are affected by CVE-2026-89813?
How do I fix CVE-2026-89813?
Apply the vendor's patch.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-89813 being exploited?
There is no known exploitation of CVE-2026-89813 in the wild and no public exploit code.
Sources
Also known as AZL-101316, BELL-CVE-2026-89813, DEBIAN-CVE-2026-89813, GHSA-r5wm-5xw8-prj5, UBUNTU-CVE-2026-89813.