Microsoft releases emergency Windows 11 update to fix September Patch Tuesday bugs

Microsoft began rolling out an emergency out‑of‑band update on Tuesday to remediate problems caused by its record‑breaking September Patch Tuesday release. The September update, which addressed nearly 1,000 vulnerabilities across the Windows ecosystem, inadvertently introduced bugs that disrupted folder sharing on Hyper‑V‑based Linux virtual machines, impaired Remote Desktop Services sessions, and caused malfunctions in certain USB audio devices. The issues affected a range of users, including businesses, developers, and gamers, prompting the company to issue a rapid corrective patch.

The out‑of‑band update, released yesterday, targets Windows 11 versions 26H1, 25H2 and 24H2 and includes corresponding fixes for Windows Server 2022 and related server editions. By addressing the identified regressions, Microsoft aims to restore functionality for affected workloads and prevent further operational impact. The company’s swift response underscores its commitment to maintaining security while ensuring stability for its enterprise and consumer customers.