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CVE-2026-21734— GPU DDK - libusc OOB write at TreeRemove during WebGPU shader compilation

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.

Imagination Technologies Graphics DDK是Imagination Technologies的图形驱动程序开发套件。 Imagination Technologies Graphics DDK存在缓冲区错误漏洞，该漏洞源于GPU着色器编译器越界写入，可能导致包含异常GPU着色器代码的网页加载时造成编译器崩溃，当编译器进程拥有系统权限时可能进一步被利用。

AI Predicted 7.8 Difficulty: Moderate EPSS 0.16% · P5

Affected Version Matrix 5

VendorProduct Version RangeStatus
Imagination Technologies Graphics DDK 1.18 RTM affected
23.2 RTM affected
24.1 RTM≤ 24.2 RTM affected
25.1 RTM≤ 25.3 RTM affected
26.1 RTM unaffected
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I. Basic Information for CVE-2026-21734

Vulnerability Information
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Vulnerability Title
GPU DDK - libusc OOB write at TreeRemove during WebGPU shader compilation
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
使用越界的指针偏移
Source: CVE Program / CVE List V5
Vulnerability Title
Imagination Technologies Graphics DDK 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Imagination Technologies Graphics DDK是Imagination Technologies的图形驱动程序开发套件。 Imagination Technologies Graphics DDK存在缓冲区错误漏洞，该漏洞源于GPU着色器编译器越界写入，可能导致包含异常GPU着色器代码的网页加载时造成编译器崩溃，当编译器进程拥有系统权限时可能进一步被利用。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

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

II. Public POCs for CVE-2026-21734

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III. Intelligence Information for CVE-2026-21734

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News Coverage for CVE-2026-21734 (1)

IV. Related Vulnerabilities

Same product: Graphics DDK
Same vendor: Imagination Technologies
Same weakness: CWE-823

V. Comments for CVE-2026-21734

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