Microsoft Windows SMB Server Denial-of-Service Vulnerability

A denial-of-service vulnerability has been identified in Windows SMB Server. This issue arises from a race condition, where concurrent execution using shared resources is not properly synchronized. As a result, an authorized attacker can disrupt service over the network.

Impact

Exploitation of this vulnerability leads to a significant denial-of-service condition, causing affected systems to become unresponsive or unavailable.

Remediation

Users can apply the security update for this vulnerability, which is available as part of the January 2026 Monthly Rollup. Instructions for downloading this update can be found in the Microsoft Update Catalog.