CVE-2026-43239

Updated on 06 May 2026

Severity

8.8 High severity

Details

CVSS score
8.8

Overview

About vulnerability

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. A flaw was found in the Linux kernel’s Server Message Block (SMB) client. A race condition exists where multiple operations attempting to update network interfaces could execute simultaneously. This concurrency issue could lead to an inconsistent state within the SMB client, potentially causing system instability or a denial of service (DoS).

Details

KernelCare state

Live-patch status from KernelCare for each operating system.

Operating system Status Covered kernels
Debian 13 Planned
Ubuntu 24.04 Planned
Ubuntu 24.04 AWS Planned