VB-Audio Voicemeeter Virtual Audio Driver uninitialized pointer

Summaryinfo

A vulnerability marked as problematic has been reported in VB-Audio Voicemeeter, Voicemeeter Banana, Voicemeeter Potato, Matrix and Matrix Coconut. This affects an unknown function of the component Virtual Audio Driver. Performing a manipulation results in uninitialized pointer. This vulnerability is cataloged as CVE-2026-23761. The attack must be initiated from a local position. There is no exploit available.

Detailsinfo

A vulnerability was found in VB-Audio Voicemeeter, Voicemeeter Banana, Voicemeeter Potato, Matrix and Matrix Coconut. It has been classified as problematic. This affects an unknown code of the component Virtual Audio Driver. The manipulation with an unknown input leads to a uninitialized pointer vulnerability. CWE is classifying the issue as CWE-824. The product accesses or uses a pointer that has not been initialized. This is going to have an impact on availability. The summary by CVE is:

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.

The weakness was shared by Klaus Hahnenkamp. It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2026-23761 since 01/15/2026. The exploitability is told to be easy. Attacking locally is a requirement. The technical details are unknown and an exploit is not publicly available.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Vendor

• VB-Audio

Name

• Matrix
• Matrix Coconut
• Voicemeeter
• Voicemeeter Banana
• Voicemeeter Potato

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