---
id: CVE-2026-15466
title: >-
  GPU DDK - Write UAF due to a race condition caused by insufficient locking in
  PVRSRVRGXCloseHWPerfClientStreamKM()
summary: >-
  Software installed and run as a non-privileged user may conduct improper GPU
  system calls to cause race condition in hardware performance counters buffer’s
  destruction path leading to read and/or write UAF.




  The race condition in the d…
severity: high
cvss: 7
cvssVector: 'CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H'
cvssSource: adp
cwe:
  - CWE-416
vendor: Imagination Technologies
product: Graphics DDK
affected:
  - graphics_ddk 24.2 RTM2
  - graphics_ddk >= 25.1 RTM2 <= 25.3 RTM
  - graphics_ddk 26.1 RTM2
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-11-05T21:38:31.822886Z'
published: '2026-10-30'
updated: '2026-11-05'
sourceUpdated: '2026-11-05T21:38:51.027Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-15466'
references:
  - url: 'https://www.imaginationtech.com/gpu-driver-vulnerabilities/'
tags:
  - cve.org
epss: 0.00177
epssPercentile: 0.07365
ingestedAt: '2026-11-03T09:40:52.173Z'
---

## Overview

Software installed and run as a non-privileged user may conduct improper GPU system calls to cause race condition in hardware performance counters buffer’s destruction path leading to read and/or write UAF.



The race condition in the destruction path could lead to reference counter being decremented in non-atomical way allowing other code paths using a freed object to read and/or write kernel heap memory.

## Affected

- `graphics_ddk 24.2 RTM2`
- `graphics_ddk >= 25.1 RTM2 <= 25.3 RTM`
- `graphics_ddk 26.1 RTM2`

## Remediation

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