CVE-2026-41156: GPU DDK - kernel<->fw CCB contains SYNC_PRIMITIVE_BLOCK firmware address without holding reference

Severity: high (CVSS 7.7 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-06-19 · updated 2026-10-26
Weakness: CWE-416

Description

Software installed and run as a non-privileged user may conduct improper GPU system calls to cause mismanagement of resources creating a write use after free scenario. A shared resource (memory page) managed by a CPU thread of control (driver) and accessed by a GPU thread of control (Firmware) can cause a write UAF when the CPU thread frees the resource before the GPU FW has finished accessing it.

Affected products

Imagination Technologies Graphics DDK: from 25.1 RTM through 25.3 RTM; 1.18 RTM, 23.2 RTM, 24.2 RTM, 26.1 RTM

References

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

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