CVE-2026-21732— GPU DDK - libusc OOB write at ConvertSwitchToArrayLookupBP 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 Graphics DDK是英国Imagination公司的一款GPU驱动工具套件。 Imagination Graphics DDK存在安全漏洞，该漏洞源于GPU着色器编译器库存在越界写入，可能导致崩溃。
Possible ATT&CK Techniques 1 AI
T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-21732
Vulnerability Information
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Vulnerability Title
GPU DDK - libusc OOB write at ConvertSwitchToArrayLookupBP 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 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.
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 Graphics DDK 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Imagination Graphics DDK是英国Imagination公司的一款GPU驱动工具套件。 Imagination Graphics DDK存在安全漏洞，该漏洞源于GPU着色器编译器库存在越界写入，可能导致崩溃。
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 | 1.17 RTM | - |
|
II. Public POCs for CVE-2026-21732
| # | POC Description | Source Link | Shenlong Link |
|---|
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News Coverage for CVE-2026-21732 (1)
IV. Related Vulnerabilities
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GPU DDK - rgxfw_to_ptr() does not reject FW private data poi
Same vendor: Imagination Technologies
-
CVE-2026-45197
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Same weakness: CWE-823
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V. Comments for CVE-2026-21732
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