CVE-2026-21732

CVE-2026-21732: GPU DDK - libusc OOB write at ConvertSwitchToArrayLookupBP during WebGPU shader compilation

Vendor Imagination Technologies
Product Graphics DDK
Weakness CWE-823
Published March 20, 2026
Last update March 23, 2026

CVSS base score

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

March 20, 2026 CVE published
March 23, 2026 Record updated