CVE-2026-11891: Arm Ltd Arm 5th Gen GPU Architecture Userspace Driver

Medium severity, CVSS 5.1. EPSS: 0.1% chance of exploitation in the next 30 days.

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.

Affected products

• Arm Ltd Arm 5th Gen GPU Architecture Userspace Driver: from r46p0, up to and including r49p5; from r50p0, up to and including r54p3; version r55p0 only
• Arm Ltd Valhall GPU Userspace Driver: from r46p0, up to and including r49p5; from r50p0, up to and including r54p3; version r55p0 only

Published 2026-09-08. Last modified 2026-09-10.