CVE-2026-64393

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: none

Integrity: high

Availability: high

Description

AI Translation Available

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

ksmbd: run set info with opener credentials

SMB2 SET_INFO handlers call path-based VFS helpers after checking the
access mask granted to the SMB handle. Those helpers perform their owner,
inode permission and LSM checks using the current ksmbd worker credentials.

Run the complete SET_INFO dispatch with the credentials captured when the
handle was opened. This also removes the separate security information
credential setup and keeps all SET_INFO classes under one credential scope.

Direct override_creds() is used because it can nest with the request
credential overrides already used by rename and link helpers.