CVE-2026-64257

Published: Lug 25, 2026 Last Modified: Lug 27, 2026

ExploitDB:

Other exploit source:

Google Dorks:

CRITICAL 9,1

Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67

Attack Vector: network

Attack Complexity: low

Privileges Required: none

User Interaction: none

Scope: unchanged

Confidentiality: high

Integrity: none

Availability: high

Description

AI Translation 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.