The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - ksmbd: add permission checks for FSCTL_DUPLICATE_EXTENTS_TO_FILE The FSCTL_DUPLICATE_EXTENTS_TO_FILE arm     of smb2_ioctl() overwrites the destination file's data via vfs_clone_file_range() with neither the share-     level KSMBD_TREE_CONN_FLAG_WRITABLE check nor a per-handle fp->daccess check that the other write-bearing     arms carry. A client can overwrite destination data on a read-only share, or from a handle opened with     only FILE_WRITE_ATTRIBUTES (which still yields an FMODE_WRITE filp). FILE_WRITE_ATTRIBUTES-only     destination handle overwrote the file's data via the clone. Add both checks, matching the FSCTL_SET_SPARSE     permission fix; require FILE_WRITE_DATA since this writes data. (CVE-2026-64399)

Note that Nessus relies on the presence of the package as reported by the vendor.

An update of the linux package has been released.

ID	Name	Product	Family	Published	Updated	Severity
329776	Linux Distros Unpatched Vulnerability : CVE-2026-64399	Nessus	Misc.	7/25/2026	7/27/2026	critical
329325	Photon OS 5.0: Linux PHSA-2026-5.0-0928	Nessus	PhotonOS Local Security Checks	7/24/2026	8/1/2026	medium

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