CVE-2026-21736: GPU DDK - Insufficient permission check in PhysmemWrapExtMem() when write attribute support enabled

Severity: medium (CVSS 4.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-03-09 · updated 2026-06-17
Weakness: CWE-280

Description

Software installed and run as a non-privileged user may conduct improper GPU system calls to gain write permission to read-only wrapped user-mode memory. This is caused by improper handling of the memory protections for the user-mode wrapped memory resource.

Affected products

Imagination Technologies Graphics DDK: 25.1, 25.1-rtm2

References

https://www.imaginationtech.com/gpu-driver-vulnerabilities/

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