CVE-2026-64021

/// Technical 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)

/// Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// References