CVE-2025-37930: drm/nouveau: Fix WARN_ON in nouveau_fence_context_kill()

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-05-20 · updated 2026-06-17
Weakness: CWE-617

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.

Affected products

Debian Linux: 11.0
Linux kernel: from 5.6 before 5.10.238; from 5.11 before 5.15.182; from 5.16 before 6.1.138; from 6.2 before 6.6.90; from 6.7 before 6.12.28; from 6.13 before 6.14.6 — fixed in 5.10.238, 5.15.182, 6.1.138, 6.12.28, 6.14.6, 6.6.90

How to fix

Upgrade to a fixed version: Linux kernel 5.10.238, 5.15.182, 6.1.138, 6.12.28. Check the vendor advisory for mitigations.

References

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