CVE-2025-38187 drm/nouveau: fix a use-after-free in r535_gsp_rpc_push()
A use-after-free in the Linux kernel's nouveau driver allows attackers to potentially execute code or cause a system crash.
- 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-2025-38187?
CVE-2025-38187 is a high-severity use after free vulnerability in Linux kernel, published on 4 Jul 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 a use-after-free in r535_gsp_rpc_push()
The RPC container is released after being passed to r535_gsp_rpc_send().
When sending the initial fragment of a large RPC and passing the caller's RPC container, the container will be freed prematurely. Subsequent attempts to send remaining fragments will therefore result in a use-after-free.
Allocate a temporary RPC container for holding the initial fragment of a large RPC when sending. Free the caller's container when all fragments are successfully sent.
[ Rebase onto Blackwell changes. - Danilo ]
Weakness: CWE-416
Which versions are affected by CVE-2025-38187?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2025-38187?
Apply the vendor's patch.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2025-38187 being exploited?
There is no known exploitation of CVE-2025-38187 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2025-38187, DEBIAN-CVE-2025-38187, GHSA-pf92-pqjf-2hmw, ROOT-OS-DEBIAN-13-CVE-2025-38187, ROOT-OS-UBUNTU-2404-CVE-2025-38187, UBUNTU-CVE-2025-38187.