CVE-2026-64021 Details
Description
In the Linux kernel, the following vulnerability has been resolved: drm/xe/oa: Fix exec_queue leak on width check in stream open In xe_oa_stream_open_ioctl(), when param.exec_q->width > 1 the function returns -EOPNOTSUPP directly, skipping the existing err_exec_q cleanup path. The exec_queue reference obtained by xe_exec_queue_lookup() is leaked. The exec queue holds a reference on the xe_file, which is only dropped during queue teardown. The leaked lookup ref is not on the file's exec_queue xarray, so file close cannot release it. This keeps both the exec queue and the file private state pinned indefinitely. Jump to err_exec_q instead of returning directly so the reference is released. (cherry picked from commit 339fa0be9e4a5d69fa47e91f4a36574224fb478f)
A vulnerability in the Linux kernel's handling of executive queue references within the Direct Rendering Manager (DRM) for Intel's Xe architecture has been addressed. The issue arose in the 'xe_oa_stream_open_ioctl()' function, where a width check on the execution queue parameter could lead to a reference leak. Specifically, when the execution queue width exceeded one, the function would return an 'Operation Not Supported' error without properly cleaning up the allocated resources. This oversight caused a reference to the execution queue to remain active indefinitely, preventing the associated file from being closed and released properly. The vulnerability has been fixed by modifying the function to return the error while also initiating the cleanup process, ensuring that all references are correctly managed.
Users can upgrade to the latest version of the Linux kernel where this vulnerability has been fixed. Instructions for downloading the patched version are available on the Linux Kernel Archive.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No CVSS 3.x data is available for this CVE.
No data available for CVSS Version 2.0 on this CVE.
No SSVC data is available for this CVE.
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Weakness Enumeration
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Affected Products
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Change History
1 change record found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 19, 2026 | New CVE Received | kernel.org |