CVE-2026-43378 CRITICAL

CVE-2026-43378: smb: server: fix use-after-free in smb2_open()

Vendor Linux
Product Linux
Published May 8, 2026
Last update May 20, 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: server: fix use-after-free in smb2_open() The opinfo pointer obtained via rcu_dereference(fp->f_opinfo) is dereferenced after rcu_read_unlock(), creating a use-after-free window.

Key dates

02Disclosure timeline

May 8, 2026 CVE published
May 20, 2026 Record updated