CVE-2026-45972 CRITICAL

CVE-2026-45972: smb: client: fix potential UAF and double free in smb2_open_file()

Vendor Linux
Product Linux
Published May 27, 2026
Last update June 30, 2026
View on NVD All CVEs

CVSS base score

9.8/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality High
Integrity High

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

What the vulnerability does

01Description

In the Linux kernel, the following vulnerability has been resolved: smb: client: fix potential UAF and double free in smb2_open_file() Zero out @err_iov and @err_buftype before retrying SMB2_open() to prevent an UAF bug if @data != NULL, otherwise a double free.

Key dates

02Disclosure timeline

May 27, 2026 CVE published
June 30, 2026 Record updated