CVE-2025-68735 drm/panthor: Prevent potential UAF in group creation
A use-after-free vulnerability in the Linux kernel Panthor GPU driver allows local attackers to potentially execute code or escalate privileges via race conditions.
- 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-2025-68735?
CVE-2025-68735 is a high-severity use after free vulnerability in Linux, published on 24 Dec 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/panthor: Prevent potential UAF in group creation
This commit prevents the possibility of a use after free issue in the GROUP_CREATE ioctl function, which arose as pointer to the group is accessed in that ioctl function after storing it in the Xarray. A malicious userspace can second guess the handle of a group and try to call GROUP_DESTROY ioctl from another thread around the same time as GROUP_CREATE ioctl.
To prevent the use after free exploit, this commit uses a mark on an entry of group pool Xarray which is added just before returning from the GROUP_CREATE ioctl function. The mark is checked for all ioctls that specify the group handle and so userspace won't be abe to delete a group that isn't marked yet.
v2: Add R-bs and fixes tags
Which versions are affected by CVE-2025-68735?
How do I fix CVE-2025-68735?
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-2025-68735 being exploited?
There is no known exploitation of CVE-2025-68735 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2025-68735, DEBIAN-CVE-2025-68735, GHSA-cqpf-ph48-g563, ROOT-OS-DEBIAN-13-CVE-2025-68735, UBUNTU-CVE-2025-68735.