CVE-2026-43399: drm/amdgpu/userq: Fix reference leak in amdgpu_userq_wait_ioctl

Severity: medium (CVSS 5.5 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: 2026-05-08 · updated 2026-06-17

Description

In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu/userq: Fix reference leak in amdgpu_userq_wait_ioctl Drop reference to syncobj and timeline fence when aborting the ioctl due output array being too small. (cherry picked from commit 68951e9c3e6bb22396bc42ef2359751c8315dd27)

Affected products

Linux kernel: from 6.16 before 6.18.19; from 6.19 before 6.19.9; 7.0-rc1 — fixed in 6.18.19, 6.19.9

How to fix

Upgrade to a fixed version: Linux kernel 6.18.19, 6.19.9. Check the vendor advisory for mitigations.

References

https://git.kernel.org/stable/c/49abfa812617a7f2d0132c70d23ac98b389c6ec1
https://git.kernel.org/stable/c/5409247d41f372bec5b141ef599f2d9f5e81b746
https://git.kernel.org/stable/c/762f47e2b824383d5be65eee2c40a1269b7d50c8

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