CVE-2026-43399
Analyzed Analyzed - Analysis Complete
Reference Leak in AMDGPU UserQ IOCTL Handling

Publication date: 2026-05-08

Last updated on: 2026-05-21

Assigner: kernel.org

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)
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Meta Information
Published
2026-05-08
Last Modified
2026-05-21
Generated
2026-06-19
AI Q&A
2026-05-08
EPSS Evaluated
2026-06-18
NVD
CVE-2026-43399
EUVD
EUVD-2026-28705
Affected Vendors & Products
Showing 3 associated CPEs
Vendor Product Version / Range
linux linux_kernel 7.0
linux linux_kernel From 6.19 (inc) to 6.19.9 (exc)
linux linux_kernel From 6.16 (inc) to 6.18.19 (exc)
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Exploitability
CWE
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KEV
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CWE ID Description
CWE-UNKNOWN
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Executive Summary

This vulnerability is a reference leak in the Linux kernel's amdgpu driver, specifically in the drm/amdgpu/userq component. It occurs in the amdgpu_userq_wait_ioctl function, where references to sync objects and timeline fences are not properly released when aborting the ioctl due to the output array being too small.

Impact Analysis

The impact of this vulnerability is related to resource management within the Linux kernel's amdgpu driver. A reference leak can lead to increased memory usage or resource exhaustion over time, potentially causing degraded system performance or instability.

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