Critical severity · published Mar 20, 2026
CVE-2026-21732
GPU DDK - libusc OOB write at ConvertSwitchToArrayLookupBP during WebGPU shader compilation
9.6
CVSS
0.3%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
High
Integrity
High
Availability
High
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 23% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
GD
Graphics DDK · Imagination Technologies
23.2 RTM; 24.1 RTM through 25.1 RTM · source: vendor
DD
Ddk · Imaginationtech
24.1 through 25.1; 1.17; 1.18; 23.2 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-21732
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-21732
Vendor Advisory
https://www.imaginationtech.com/gpu-driver-vulnerabilities/
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