CVE-2026-64395

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

ExploitDB:

Other exploit source:

Google Dorks:

HIGH 7,5

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: none

Description

AI Translation Available

In the Linux kernel, the following vulnerability has been resolved:

ksmbd: require source read access for duplicate extents

FSCTL_DUPLICATE_EXTENTS_TO_FILE passes the source file directly to
vfs_clone_file_range() or vfs_copy_file_range() without checking the SMB
access mask granted to the source handle. A handle opened with attribute
access can consequently be used to copy file contents into an
attacker-readable destination.

Require FILE_READ_DATA on the source handle before either VFS operation,
matching other ksmbd data-copy paths.