CVE-2026-89553 nouveau/gem: reserve the bo in the info ioctl around the vma lookup
A race condition in the nouveau GPU driver allows a use-after-free, potentially enabling local attackers to execute code or escalate privileges.
- 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-2026-89553?
CVE-2026-89553 is a high-severity use after free vulnerability in Linux, published on 11 Sep 2026. 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:
nouveau/gem: reserve the bo in the info ioctl around the vma lookup
In the non-uvmm path, there could be a race between the info lookup finding the vma, and the gem close path closing the vma leading to a use-after-free.
Spotted with the help of Opus 4.6.
Which versions are affected by CVE-2026-89553?
How do I fix CVE-2026-89553?
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-2026-89553 being exploited?
There is no known exploitation of CVE-2026-89553 in the wild and no public exploit code.
Sources
Also known as AZL-100461, BELL-CVE-2026-89553, DEBIAN-CVE-2026-89553, GHSA-9qfh-2fg7-437p, UBUNTU-CVE-2026-89553.