CVE-2026-21734

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

Published Jun 26, 2026 CVSS 3.1 · 7.7 High EPSS < 1% KEV · Not listed
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 small value in GPU shader code can cause a segmentation fault in the GPU shader compiler due to am out-of-bounds write.

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 Imaginationtech
Imaginationtech graphics Ddk
Vendors & Products Imaginationtech
Imaginationtech graphics Ddk
Type Values Removed Values Added
Metrics cvssV3_1

{'score': 7.7, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
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 small value in GPU shader code can cause a segmentation fault in the GPU shader compiler due to am out-of-bounds write.
Title GPU DDK - libusc OOB write at TreeRemove during WebGPU shader compilation
Weaknesses CWE-823
References
Weaknesses

Sources

Status
PUBLISHED
Assigner
imaginationtech
Published
Updated
Jun 26, 2026, 7:13 PM
Reserved
Jan 5, 2026, 11:57 AM
Status
Analyzed
Published
Jun 26, 2026, 4:16 PM
Modified
Oct 25, 2026, 5:10 PM