CVE-2026-11891

Mali GPU Userspace Driver allows access to already freed memory

Published Sep 8, 2026 CVSS 3.1 · 5.1 Medium EPSS < 1% KEV · Not listed
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.

Remediation

Vendor Solution

This issue has been fixed in the following versions: Valhall GPU Userspace Driver: r56p0; Arm 5th Gen GPU Architecture Userspace Driver: r56p0. Arm partners are recommended to upgrade to the latest applicable version as soon as possible.

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics cvssV3_1

{'score': 5.1, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Arm
Arm 5th Gen Gpu Architecture Userspace Driver
Arm valhall Gpu Userspace Driver
Vendors & Products Arm
Arm 5th Gen Gpu Architecture Userspace Driver
Arm valhall Gpu Userspace Driver
Type Values Removed Values Added
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.
Title Mali GPU Userspace Driver allows access to already freed memory
Weaknesses CWE-416
References
Weaknesses

Sources

Status
PUBLISHED
Assigner
Arm
Published
Updated
Sep 10, 2026, 6:28 PM
Reserved
Jun 10, 2026, 3:09 PM
Status
Awaiting Analysis
Published
Sep 8, 2026, 3:18 PM
Modified
Sep 10, 2026, 7:17 PM