# CVE-2026-9034: Arm Bifrost GPU Userspace Driver use-after-free vulnerability

Source: https://junglewise.ai/threats/cve-2026-9034-arm-bifrost-gpu-userspace-driver-use-after-free-vulnerability  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-08. Updated: 2026-09-26  
License: CC BY 4.0 with a link back

CVE-2026-9034 · Severity: high · CVSS 7.8 · Published 2026-09-08

Arm GPU userspace drivers used in mobile and embedded devices contain a use-after-free vulnerability that allows an unprivileged user to access freed memory through valid GPU processing operations initiated via WebGL or WebGPU. An attacker could exploit this to read sensitive data, cause a denial of service, or potentially execute code, impacting device security and stability.

Vendors: [Arm](https://junglewise.ai/threats/vendors/arm).

## Quick answers

**Is CVE-2026-9034 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-9034 being exploited in the wild.

**How severe is CVE-2026-9034?** High severity, with a CVSS score of 7.8, published 8 September 2026.

**Which products and versions are affected?** Arm 5th Gen GPU Architecture Userspace Driver r42p0 through r49p5, r50p0 through r54p3, r55p0; Arm Bifrost GPU Userspace Driver r42p0 through r49p5, r50p0 through r51p0, r54p1 through r54p3; Arm Valhall GPU Userspace Driver r42p0 through r49p5, r50p0 through r54p3, r55p0.

**Is there a fix for CVE-2026-9034?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-9034 attacked?** It is attacked over the network or with local access, in a software library.

**Am I affected by CVE-2026-9034?** Check whether you run Arm 5th Gen GPU Architecture Userspace Driver, Arm Bifrost GPU Userspace Driver or Arm Valhall GPU Userspace Driver at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

A use-after-free vulnerability exists in the Bifrost, Valhall, and 5th Gen GPU architecture userspace drivers. The vulnerability is triggered when a non-privileged process submits valid GPU processing operations (including through WebGL or WebGPU interfaces), which reference memory that has already been freed. No special privileges are required to trigger the flaw. An attacker can read freed memory contents or cause memory corruption, potentially leading to information disclosure or denial of service. Patches are available for affected version ranges.

## Affected products

- Arm Bifrost GPU Userspace Driver r42p0 through r49p5, r50p0 through r51p0, r54p1 through r54p3
- Arm Valhall GPU Userspace Driver r42p0 through r49p5, r50p0 through r54p3, r55p0
- Arm 5th Gen GPU Architecture Userspace Driver r42p0 through r49p5, r50p0 through r54p3, r55p0

## Timeline

- 2026-09-08: disclosed: Vulnerability published on NVD

## References

- [https://support.arm.com/documentation/111552/1-0/?lang=en](https://support.arm.com/documentation/111552/1-0/?lang=en)

## Related threats

- [Arm Valhall GPU Userspace Driver use-after-free vulnerability](https://junglewise.ai/threats/cve-2026-11891-arm-valhall-gpu-userspace-driver-use-after-free-vulnerability)