🚨Microsoft Patches Windows 11 Audio Bug Affecting USB Devices
Your headphones and speakers are back to normal
TL;DR
Microsoft released a patch to fix an audio bug in Windows 11 that prevented sound from playing on certain USB devices. The update also addresses security vulnerabilities and other issues. If you're using older audio devices, grab the update now.
Microsoft released an out-of-band patch to fix an audio bug in Windows 11 that prevented sound from playing on certain USB Audio Class 1.0 devices. This update is crucial for users experiencing issues like no audio output, unresponsive sound settings, or volume controls stuck at zero. The bug was introduced with the September 8 security update and affects older devices using legacy audio drivers. The patch also addresses security vulnerabilities, including CVE-2026-62721 and CVE-2026-85921, which could allow attackers to gain system-level privileges or elevate their privileges locally. Additionally, the update fixes issues with Microsoft's Remote Desktop Services and Hyper-V virtual machine platform.
Key Points
Microsoft released an out-of-band patch to fix an audio bug in Windows 11 (KB5129195 for 26H2, KB5129194 for 25H2/24H2).
The update resolves issues with USB Audio Class 1.0 devices introduced in the September 8 security update.
The patch addresses security vulnerabilities CVE-2026-62721 and CVE-2026-85921, allowing attackers to gain system-level privileges or elevate their privileges locally.
The update also fixes issues with Microsoft's Remote Desktop Services, causing RDS instability and login failures.
Another bug affecting Hyper-V virtual machine platform, causing issues when sharing the host folder with Linux VMs using Plan 9.
Why It Matters
If you're using older USB Audio Class 1.0 devices with Windows 11, this update fixes audio issues like no sound output or unresponsive settings. The patch also addresses critical security vulnerabilities that could allow attackers to gain system-level privileges. Anyone using Remote Desktop Services or Hyper-V should also update to avoid instability and login issues.
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