CVE-2025-37951 drm/v3d: Add job to pending list if the reset was skipped
A memory leak in the Linux kernel's v3d GPU driver allows attackers to cause denial of service by triggering job timeouts that skip hardware resets.
- 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-2025-37951?
CVE-2025-37951 is a medium-severity denial of service 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/v3d: Add job to pending list if the reset was skipped
When a CL/CSD job times out, we check if the GPU has made any progress since the last timeout. If so, instead of resetting the hardware, we skip the reset and let the timer get rearmed. This gives long-running jobs a chance to complete.
However, when `timedout_job()` is called, the job in question is removed from the pending list, which means it won't be automatically freed through `free_job()`. Consequently, when we skip the reset and keep the job running, the job won't be freed when it finally completes.
This situation leads to a memory leak, as exposed in [1] and [2].
Similarly to commit 704d3d60fec4 ("drm/etnaviv: don't block scheduler when GPU is still active"), this patch ensures the job is put back on the pending list when extending the timeout.
Weakness: CWE-401
Which versions are affected by CVE-2025-37951?
It affects 2 products.
Products include Debian Debian Linux, Linux kernel.
How do I fix CVE-2025-37951?
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-2025-37951 being exploited?
There is no known exploitation of CVE-2025-37951 in the wild and no public exploit code.
Other vulnerabilities in Debian Debian Linux
Sources
Also known as BELL-CVE-2025-37951, DEBIAN-CVE-2025-37951, GHSA-xxvw-mmrh-6cr5, ROOT-OS-DEBIAN-11-CVE-2025-37951, ROOT-OS-DEBIAN-12-CVE-2025-37951, ROOT-OS-UBUNTU-2204-CVE-2025-37951 and 2 more.