In the Linux kernel, the following vulnerability has been resolved: smb: client: reject overlapping data areas in SMB2 responses Commit 53b7c271f06b ("smb: client: restrict implied bcc[0] exemption to responses without data area") restricted the implied bcc[0] length exception to responses without a data area. However, the overlap handling in __smb2_calc_size() clears data_length, which can make an invalid response appear to have no data area and so qualify for the exception. Track data area overlap separately and reject such responses before applying the length compatibility exceptions.

An update of the linux package has been released.

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

  - In the Linux kernel, the following vulnerability has been resolved: smb: client: reject overlapping data     areas in SMB2 responses Commit 53b7c271f06b (smb: client: restrict implied bcc[0] exemption to responses     without data area) restricted the implied bcc[0] length exception to responses without a data area.
    However, the overlap handling in __smb2_calc_size() clears data_length, which can make an invalid response     appear to have no data area and so qualify for the exception. Track data area overlap separately and     reject such responses before applying the length compatibility exceptions. (CVE-2026-64257)

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

ID	Name	Product	Family	Type	Severity
332499	Photon OS 5.0: Linux PHSA-2026-5.0-92-0928	Nessus	PhotonOS Local Security Checks	Local	high
330152	Linux Distros Unpatched Vulnerability : CVE-2026-64257	Nessus	Misc.	Local	critical
329325	Photon OS 5.0: Linux PHSA-2026-5.0-0928	Nessus	PhotonOS Local Security Checks	Local	medium

Detections

Analytics

CVE-2026-64257

critical

Tenable Plugins

high

critical

medium