CVE-2026-64108

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description An issue exists in the cifs module where a dentry remains busy after unmounting. This occurs because the cifs file close work, handled by cfile->deferred, can be executed after the unmounting process. Specifically, when a file is closed, a delayed work item is queued; if the filesystem is unmounted before this work is processed, the dentry reference count remains positive during the generic shutdown super process, triggering a system warning. This is caused by a race condition between the deferred close work and the unmount sequence.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.