VB-Audio Voicemeeter IOCTL length out-of-range pointer offset

Summaryinfo

A vulnerability classified as problematic was found in VB-Audio Voicemeeter, Voicemeeter Banana, Voicemeeter Potato, Matrix and Matrix Coconut. Affected by this vulnerability is an unknown functionality of the component IOCTL Handler. The manipulation of the argument length results in use of out-of-range pointer offset. This vulnerability is reported as CVE-2026-23764. The attack requires a local approach. No exploit exists.

Detailsinfo

A vulnerability classified as problematic has been found in VB-Audio Voicemeeter, Voicemeeter Banana, Voicemeeter Potato, Matrix and Matrix Coconut. Affected is an unknown function of the component IOCTL Handler. The manipulation of the argument length with an unknown input leads to a use of out-of-range pointer offset vulnerability. CWE is classifying the issue as CWE-823. The product performs pointer arithmetic on a valid pointer, but it uses an offset that can point outside of the intended range of valid memory locations for the resulting pointer. This is going to have an impact on availability. CVE summarizes:

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). The drivers allocate non-paged pool and map it into user space, where a length value associated with the allocation is exposed and can be modified by an unprivileged local attacker. On subsequent IOCTL handling, the corrupted length is used directly as the IoAllocateMdl length argument without adequate integrity checks before building and mapping the MDL, which can cause a kernel crash (BSoD), typically PAGE_FAULT_IN_NONPAGED_AREA. This flaw allows a local user to trigger a denial-of-service on affected Windows systems.

The weakness was disclosed by Klaus Hahnenkamp. The advisory is available at github.com. This vulnerability is traded as CVE-2026-23764 since 01/15/2026. The exploitability is told to be easy. Local access is required to approach this attack. Technical details are known, but there is no available exploit.

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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