CVE-2026-45203

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

Published Jul 10, 2026 CVSS 3.1 · 7.8 High EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Google
Google android
Imaginationtech ddk
Linux
Linux linux Kernel
CPEs cpe:2.3:a:imaginationtech:ddk:*:*:*:*:*:*:*:*
cpe:2.3:a:imaginationtech:ddk:26.1:rtm1:*:*:*:*:*:*
cpe:2.3:o:google:android:-:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*
Vendors & Products Google
Google android
Imaginationtech ddk
Linux
Linux linux Kernel
Type Values Removed Values Added
Metrics cvssV3_1

{'score': 7.8, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Imaginationtech
Imaginationtech graphics Ddk
Vendors & Products Imaginationtech
Imaginationtech graphics Ddk
Type Values Removed Values Added
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.
Title GPU DDK - rgxfw_hwperf_ufo() re-reads psCmdHeader->ui32CmdSize after initial check, TOCTOU
Weaknesses CWE-367
References
Weaknesses

Sources

Status
PUBLISHED
Assigner
imaginationtech
Published
Updated
Jul 13, 2026, 6:55 PM
Reserved
May 11, 2026, 10:58 AM
Status
Analyzed
Published
Jul 10, 2026, 9:16 PM
Modified
Oct 25, 2026, 3:10 PM