GPU DDK - TOCTOU affecting psFWMemContext->uiPageCatBaseRegSet (CVE-2026-45197) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-45197

GPU DDK - TOCTOU affecting psFWMemContext->uiPageCatBaseRegSet

Answer in brief

CVE-2026-45197 records a Unknown severity vulnerability in GPU DDK - TOCTOU affecting psFWMemContext->uiPageCatBaseRegSet. The current sources do not mark it as known exploited. The current feed maps Imagination Technologies/Graphics DDK (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 4, 2026Updated Sep 4, 2026Source checked Sep 4, 2026First seen by HOL Sep 4, 2026Material review Sep 4, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Not reported

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Imagination Technologies/Graphics DDK (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Imagination Technologies/Graphics DDKgeneric	1.18 RTM2 \|\| 23.2 RTM2 \|\| 24.2 RTM2 \|\| 25.1 RTM2 \|\| 26.1 RTM1	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Imagination Technologies/Graphics DDK.
Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

Published upstream
Sep 4, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 4, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 4, 2026

Sources and claim methodology

Source referenceimaginationtech.com

Upstream source description

Kernel software installed and running inside a Guest VM may post improper commands to the GPU Firmware to trigger a read and/or write data outside the Guest's virtualised GPU memory. The firmware uses data provided by the Guest VM to set up accesses to memory. It validated this before use, but a TOCTOU bug was present which allowed the earlier check results to be invalidated.

Quoted source text, attributed separately from HOL analysis.