Microsoft rolls out emergency fix for critical issues caused by its September Patch Tuesday update, which addressed ~1,000 vulnerabilities but introduced bugs (Tom Warren/The Verge)

Microsoft has released an emergency out-of-band update to fix critical issues caused by its September Patch Tuesday update. The September update addressed nearly 1,000 vulnerabilities but introduced bugs that affected businesses, developers, and gamers.

The issues caused by the September update included problems with Remote Desktop Services sessions, USB audio devices, and folder shares on Hyper-V-based Linux virtual machines. According to The Verge, Microsoft's out-of-band update addresses these issues across various Windows 11 versions and Windows Server 202.

The September Patch Tuesday update was Microsoft's largest of 2026, with 963 CVEs, and two exploited flaws, as reported by Computerworld.

Brief written by urgent.news from Techmeme, The Verge, Computerworld — 3 reports on this story. Machine-written — may contain errors; check the original before relying on it.