CVE-2026-11891 Mali GPU Userspace Driver allows access to already freed memory
A use-after-free flaw in Arm Mali GPU drivers allows non-privileged users to access freed memory via WebGL or WebGPU, potentially leading to information disclosure or code execution.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-11891?
CVE-2026-11891 is a medium-severity use after free vulnerability in Arm 5th Gen GPU Architecture Userspace Driver, published on 8 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Use After Free vulnerability in Arm Ltd Valhall GPU Userspace Driver, Arm Ltd Arm 5th Gen GPU Architecture Userspace Driver allows a non-privileged user process to perform valid GPU processing operations, including via WebGL or WebGPU, to access already freed memory.
This issue affects Valhall GPU Userspace Driver: from r46p0 through r49p5, from r50p0 through r54p3, r55p0; Arm 5th Gen GPU Architecture Userspace Driver: from r46p0 through r49p5, from r50p0 through r54p3, r55p0.
Weakness: CWE-416
Which versions are affected by CVE-2026-11891?
How do I fix CVE-2026-11891?
No fix has been published for CVE-2026-11891 yet. Limit exposure of the affected software until one is available.
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-2026-11891 being exploited?
There is no known exploitation of CVE-2026-11891 in the wild and no public exploit code.
Sources
Also known as GHSA-v44f-6g2r-3454.