Use After Free in Arm GPU Userspace Drivers

Publication date: 2026-09-08

Last updated on: 2026-09-10

Assigner: Arm Limited

Description

Use After Free vulnerability in Arm Ltd Bifrost GPU Userspace Driver, 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 Bifrost GPU Userspace Driver: from r42p0 through r49p5, from r50p0 through r51p0, from r54p1 through r54p3; Valhall GPU Userspace Driver: from r42p0 through r49p5, from r50p0 through r54p3, r55p0; Arm 5th Gen GPU Architecture Userspace Driver: from r42p0 through r49p5, from r50p0 through r54p3, r55p0.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-09-08

Last Modified

2026-09-10

Generated

2026-09-29

AI Q&A

2026-09-10

EPSS Evaluated

2026-09-27

NVD

CVE-2026-9034

Affected Vendors & Products

Vendor	Product	Version / Range
arm_ltd	bifrost_gpu_userspace_driver	From r42p0 (inc) to r49p5 (inc)
arm_ltd	bifrost_gpu_userspace_driver	From r50p0 (inc) to r51p0 (inc)
arm_ltd	bifrost_gpu_userspace_driver	From r54p1 (inc) to r54p3 (inc)
arm_ltd	valhall_gpu_userspace_driver	From r42p0 (inc) to r49p5 (inc)
arm_ltd	valhall_gpu_userspace_driver	From r50p0 (inc) to r54p3 (inc)
arm_ltd	valhall_gpu_userspace_driver	From r55p0 (inc)
arm_ltd	arm_5th_gen_gpu_architecture_userspace_driver	From r42p0 (inc) to r49p5 (inc)
arm_ltd	arm_5th_gen_gpu_architecture_userspace_driver	From r50p0 (inc) to r54p3 (inc)
arm_ltd	arm_5th_gen_gpu_architecture_userspace_driver	From r55p0 (inc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-416	The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

Attack-Flow Graph

Executive Summary

This is a Use After Free vulnerability in Arm Ltd GPU drivers. It allows a non-privileged user process to access memory that has already been freed during valid GPU processing operations, including through WebGL or WebGPU.

Impact Analysis

This vulnerability could allow an attacker to read sensitive data from freed memory, cause system crashes, or potentially execute arbitrary code on affected systems using vulnerable Arm GPU drivers.

Mitigation Strategies

Update affected GPU drivers to versions beyond the specified vulnerable ranges. For Bifrost, use r49p6 or later; for Valhall and Arm 5th Gen, use r54p4 or later. Disable WebGL/WebGPU in browsers if updates are not immediately available.

Hi! I’m here to help you understand CVE-2026-9034. Ask me anything about the vulnerability, its impact, or mitigation strategies.

0/70