CVE-2026-49743: Imaginationtech Ddk

High severity, CVSS 7.8. EPSS: 0.2% chance of exploitation in the next 30 days.

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.

Affected products

• Imaginationtech Ddk: after 24.2, before 26.1 (fixed in 26.1); version 24.2 only; version 26.1 only

Published 2026-07-24. Last modified 2026-08-12.