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CVE-2026-45197— GPU DDK - TOCTOU affecting psFWMemContext->uiPageCatBaseRegSet

Quick assessment

Affected
Imagination Technologies Graphics DDK
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

安装在客户机（Guest VM）内部运行的内核软件可能向 GPU 固件发送不正确的命令，从而触发对客户机虚拟 GPU 内存区域之外的读取和/或写入操作。 固件利用由客户机提供的数据来配置内存访问。它原本会在使用该数据前进行校验，但存在一个 TOCTOU（检查时间到使用时间，Time-Of-Check to Time-Of-Use）漏洞，导致之前的校验结果可能被失效。

AI Predicted 5.6 Difficulty: Moderate
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I. Basic Information for CVE-2026-45197

Vulnerability Information
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Vulnerability Title
GPU DDK - TOCTOU affecting psFWMemContext->uiPageCatBaseRegSet
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
检查时间与使用时间(TOCTOU)的竞争条件
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Imagination Technologies Graphics DDK 1.18 RTM2 -

II. Public POCs for CVE-2026-45197

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III. Intelligence Information for CVE-2026-45197

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News Coverage for CVE-2026-45197 (1)

IV. Related Vulnerabilities

Same product: Graphics DDK
Same vendor: Imagination Technologies
Same weakness: CWE-367

V. Comments for CVE-2026-45197

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