CVE-2026-43239 HIGH

CVE-2026-43239: smb: client: prevent races in ->query_interfaces()

Vendor Linux
Product Linux
Published May 6, 2026
Last update May 11, 2026

CVSS base score

8.8/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction Required
Confidentiality High
Integrity High

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/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: prevent races in ->query_interfaces() It was possible for two query interface works to be concurrently trying to update the interfaces. Prevent this by checking and updating iface_last_update under iface_lock.

Key dates

02Disclosure timeline

May 6, 2026 CVE published
May 11, 2026 Record updated