CVE-2026-49743

GPU DDK - Write UAF of sync checkpoint in GPU kick function after export fence file descriptor is prematurely closed

State: Published
Severity: 7.8 High
Published: Jul 24, 2026
Updated: Jul 24, 2026
Reserved: Jun 1, 2026

Description

Software installed and run as a non-privileged user may conduct improper GPU system calls to manipulate the lifetimes of synchronisation objects in the kernel, leading to read/write UAFs.

During workload submission involving a fence exported by the GPU driver, the reference count of the underlying synchronisation primitive is not properly incremented. This can be exploited, by destroying the exported fence and prematurely release the underlying primitive, resulting in a potential use-after-free condition.

Scores

CVSS	Score	Vector	Source
3.1	7.8 High	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	CISA-ADP

Weaknesses

CWE-416 Use After Free (4.20)

Affected Products

Product	Versions
Graphics DDKImagination Technologies	1.18 RTM2Not affected 23.2 RTM2Not affected 24.2 RTM2Affected 25.1 RTM2 through 25.3 RTMAffected 26.1 RTM1Affected 26.1 RTM2Not affected

References

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

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