CVE-2025-37930 drm/nouveau: Fix WARN_ON in nouveau_fence_context_kill()
A race condition in the Nouveau GPU driver can trigger a kernel warning, potentially leading to a 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-2025-37930?
CVE-2025-37930 is a medium-severity vulnerability in Debian Debian Linux, published on 20 May 2025. 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/nouveau: Fix WARN_ON in nouveau_fence_context_kill()
Nouveau is mostly designed in a way that it's expected that fences only ever get signaled through nouveau_fence_signal(). However, in at least one other place, nouveau_fence_done(), can signal fences, too. If that happens (race) a signaled fence remains in the pending list for a while, until it gets removed by nouveau_fence_update().
Should nouveau_fence_context_kill() run in the meantime, this would be a bug because the function would attempt to set an error code on an already signaled fence.
Have nouveau_fence_context_kill() check for a fence being signaled.
Weakness: CWE-617
Which versions are affected by CVE-2025-37930?
It affects 2 products.
Products include Debian Debian Linux, Linux kernel.
How do I fix CVE-2025-37930?
Apply the vendor's patch.
Is CVE-2025-37930 being exploited?
There is no known exploitation of CVE-2025-37930 in the wild and no public exploit code.
Other vulnerabilities in Debian Debian Linux
Sources
Also known as BELL-CVE-2025-37930, DEBIAN-CVE-2025-37930, GHSA-m44g-hq47-38xw, ROOT-OS-DEBIAN-12-CVE-2025-37930, ROOT-OS-UBUNTU-2204-CVE-2025-37930, ROOT-OS-UBUNTU-2404-CVE-2025-37930 and 1 more.