CVE-2026-45203 — GPU DDK - rgxfw_hwperf_ufo() re-reads psCmdHeader->ui32CmdSize after initial check, TOCTOU

CVE-2026-45203

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

Description (CNA)

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.

Affected (CNA)

Vendor / product	Versions
Imagination Technologies / Graphics DDK	affected 1.18 RTM2; affected 23.2 RTM2; affected 24.2 RTM2; affected 25.1 RTM2 through 25.3 RTM; affected 26.1 RTM1; unaffected 26.1 RTM2

CWE

CWE-367

References

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

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.