CVE-2026-43395
Analyzed Analyzed - Analysis Complete
Memory Leak in Linux Kernel DRM/XE Sync Subsystem

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: Cleanup partially initialized sync on parse failure xe_sync_entry_parse() can allocate references (syncobj, fence, chain fence, or user fence) before hitting a later failure path. Several of those paths returned directly, leaving partially initialized state and leaking refs. Route these error paths through a common free_sync label and call xe_sync_entry_cleanup(sync) before returning the error. (cherry picked from commit f939bdd9207a5d1fc55cced5459858480686ce22)
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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-2026-43395
EUVD
EUVD-2026-28701
Affected Vendors & Products
Showing 4 associated CPEs
Vendor Product Version / Range
linux linux_kernel 7.0
linux linux_kernel From 6.13 (inc) to 6.18.19 (exc)
linux linux_kernel From 6.19 (inc) to 6.19.9 (exc)
linux linux_kernel From 6.8 (inc) to 6.12.78 (exc)
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Exploitability
CWE
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KEV
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CWE ID Description
CWE-459 The product does not properly "clean up" and remove temporary or supporting resources after they have been used.
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Executive Summary

This vulnerability exists in the Linux kernel's drm/xe/sync component. The function xe_sync_entry_parse() can allocate references such as syncobj, fence, chain fence, or user fence before encountering a failure later in the process. Some error paths return immediately without properly cleaning up, which results in partially initialized states and leaked references. The fix involves routing these error paths through a common cleanup routine to properly free resources before returning an error.

Impact Analysis

The vulnerability can lead to resource leaks in the Linux kernel due to partially initialized synchronization objects not being properly cleaned up on failure. This can cause increased memory usage or resource exhaustion over time, potentially degrading system performance or stability.

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