DRM/XE Sync User Fence Leak Fix

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/xe/sync: Fix user fence leak on alloc failure When dma_fence_chain_alloc() fails, properly release the user fence reference to prevent a memory leak. (cherry picked from commit a5d5634cde48a9fcd68c8504aa07f89f175074a0)

CVSS Scores

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Meta Information

Published

2026-05-08

Last Modified

2026-05-21

Generated

2026-07-09

AI Q&A

2026-05-08

EPSS Evaluated

2026-07-08

NVD

CVE-2026-43396

EUVD

EUVD-2026-28702

Affected Vendors & Products

Vendor	Product	Version / Range
linux	linux_kernel	6.18
linux	linux_kernel	6.18
linux	linux_kernel	6.18
linux	linux_kernel	6.18
linux	linux_kernel	7.0
linux	linux_kernel	From 6.19 (inc) to 6.19.9 (exc)
linux	linux_kernel	From 6.18.1 (inc) to 6.18.20 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-401	The product does not sufficiently track and release allocated memory after it has been used, making the memory unavailable for reallocation and reuse.

Attack-Flow Graph

Impact Analysis

The impact of this vulnerability is a memory leak in the Linux kernel. Over time, this could lead to increased memory usage and potentially degrade system performance or stability if the leak is significant and occurs frequently.

Executive Summary

This vulnerability is a memory leak issue in the Linux kernel related to the drm/xe/sync component. Specifically, when the function dma_fence_chain_alloc() fails during allocation, it does not properly release the user fence reference, which leads to a memory leak.

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