---
id: CVE-2026-11891
title: >-
  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, t…
summary: >-
  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, t…
severity: medium
cvss: 5.1
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N'
cwe:
  - CWE-416
vendor: Arm Ltd
product: Valhall GPU Userspace Driver
affected:
  - valhall_gpu_userspace_driver >= r46p0 <= r49p5
  - valhall_gpu_userspace_driver >= r50p0 <= r54p3
  - valhall_gpu_userspace_driver r55p0
  - arm_5th_gen_gpu_architecture_userspace_driver >= r46p0 <= r49p5
  - arm_5th_gen_gpu_architecture_userspace_driver >= r50p0 <= r54p3
  - arm_5th_gen_gpu_architecture_userspace_driver r55p0
published: '2026-09-08'
updated: '2026-09-10'
sourceUpdated: '2026-09-10T19:17:26.660'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-11891'
references:
  - url: 'https://support.arm.com/documentation/111552/1-0/?lang=en'
    label: arm-security@arm.com
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-10T18:28:09.653159Z'
epss: 0.00109
epssPercentile: 0.01137
ingestedAt: '2026-09-08T15:33:26.985Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.