CVE-2026-45203

HIGH

GPU DDK - rgxfw_hwperf_ufo() re-reads psCmdHeader->ui32CmdSize after initial check, TOCTOU

Title source: cna

Description

Kernel software installed and running inside a Host VM may post improper commands to the GPU Firmware to trigger a memory write outside the permitted range of memory for the host kernel. A TOCTOU bug existed where a malicious driver could modify values in memory after firmware validation but before use.

References (1)

Core 1

Core References

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

Scores

CVSS v3 7.8

EPSS 0.0009

EPSS Percentile 0.6%

Attack Vector LOCAL

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact total

Details

CWE

CWE-367

Status published

Products (6)

Imagination Technologies/Graphics DDK 1.18 RTM2

Imagination Technologies/Graphics DDK 23.2 RTM2

Imagination Technologies/Graphics DDK 24.2 RTM2

Imagination Technologies/Graphics DDK 25.1 RTM2 - 25.3 RTM

Imagination Technologies/Graphics DDK 26.1 RTM1

Imagination Technologies/Graphics DDK 26.1 RTM2

Published Jul 10, 2026

Tracked Since Jul 11, 2026