VB-Audio Voicemeeter & Matrix Drivers DoS via Improper FILE_OBJECT FsContext Initialization

Summary

VB-Audio Voicemeeter, Voicemeeter Banana, and Voicemeeter Potato (versions ending in 1.1.1.9, 2.1.1.9, and 3.1.1.9 and earlier, respectively), as well as VB-Audio Matrix and Matrix Coconut (versions ending in 1.0.2.2 and 2.0.2.2 and earlier, respectively), contain a vulnerability in their virtual audio drivers (vbvoicemeetervaio64*.sys, vbmatrixvaio64*.sys, vbaudio_vmauxvaio*.sys, vbaudio_vmvaio*.sys, and vbaudio_vmvaio3*.sys). When a handle is opened with a special file attribute value, the drivers improperly initialize FILE_OBJECT->FsContext to a non-pointer magic value. If subsequent operations are not handled by the VB-Audio driver and are forwarded down the audio driver stack (e.g., via PortCls to ks.sys), the invalid FsContext value can be dereferenced, causing a kernel crash (BSoD), typically SYSTEM_SERVICE_EXCEPTION with STATUS_ACCESS_VIOLATION. This flaw allows a local unprivileged user to trigger a denial-of-service on affected Windows systems.

Timeline

1. Jan 22, 2026, 4:17 PM UTCCVE published
2. Jan 22, 2026, 4:41 PM UTCCISA SSVC assessment

   Exploitation: poc · Automatable: no · Technical impact: partial

3. May 14, 2026, 2:09 AM UTCRecord last updated

Affected versions

• VB-Audio Software Voicemeeter (Standard)

  through 1.1.1.9

• VB-Audio Software Voicemeeter Banana

  through 2.1.1.9

• VB-Audio Software Voicemeeter Potato

  through 3.1.1.9

• VB-Audio Software Matrix

  through 1.0.2.2

• VB-Audio Software Matrix Coconut

  through 2.0.2.2

References 5