CVE-2026-21732

CRITICAL

GPU DDK - libusc OOB write at ConvertSwitchToArrayLookupBP during WebGPU shader compilation

Title source: cna
STIX 2.1

Description

A web page that contains unusual GPU shader code is loaded into the GPU compiler process and can trigger a write out-of-bounds write crash in the GPU shader compiler library. On certain platforms, when the compiler process has system privileges this could enable further exploits on the device. An edge case using a very large value in switch statements in GPU shader code can cause a segmentation fault in the GPU shader compiler due to an out-of-bounds write access.

Scores

CVSS v3 9.6
EPSS 0.0006
EPSS Percentile 18.9%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact total

Details

CWE
CWE-787 CWE-823
Status published
Products (9)
Imagination Technologies/Graphics DDK 1.17 RTM
Imagination Technologies/Graphics DDK 1.18 RTM
Imagination Technologies/Graphics DDK 23.2 RTM
Imagination Technologies/Graphics DDK 24.1 RTM - 25.1 RTM
Imagination Technologies/Graphics DDK 25.2 RTM
imaginationtech/ddk 1.17
imaginationtech/ddk 1.18
imaginationtech/ddk 23.2
imaginationtech/ddk 24.1 - 25.1
Published Mar 20, 2026
Tracked Since Mar 21, 2026