Vulnerability Intelligence Report
Mali GPU Userspace Driver allows access to already freed memory
CVE-2026-11891
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.
No Active Exploit Signals
CVSS Base Score
5.1
MEDIUM
Exploitability:2.6
Impact Score:2.6
EPSS Probability:0.14%
Executive Threat Verdict
Evaluating...
Evaluating Threat Landscape...
Assessing known weaponization, exploitation telemetry, and federal advisories.
Attack Surface
—
Authentication
—
Weaponization
—
SSVC Action
—
Weaknesses (CWE)
CWE-416 ↗CWE-416 Use After Free
Affected Products & Versions
| Vendor | Product | Affected Versions |
|---|---|---|
| Arm Ltd | Valhall GPU Userspace Driver | r46p0 <= r49p5 (affected), r50p0 <= r54p3 (affected), r55p0 (affected), r56p0 (unaffected) |
| Arm Ltd | Arm 5th Gen GPU Architecture Userspace Driver | r46p0 <= r49p5 (affected), r50p0 <= r54p3 (affected), r55p0 (affected), r56p0 (unaffected) |
References & Technical Advisories
No reference links found.
Threat Intelligence Signals
EPSS Score
0.139%
GitHub Advisory
Identity & Timeline
| Status | PUBLISHED |
| Assigning Authority | Arm Limited · Open Source · UK |
| Reserved | 2026-06-10T15:09:29 |
| Published | 2026-09-08T14:21:40 |
| Last Updated | 2026-09-10T18:28:12 |
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