VB-Audio Matrix/Matrix Coconut VAIO Virtual Audio Driver exposure of resource

Summaryinfo

A vulnerability classified as critical has been found in VB-Audio Matrix and Matrix Coconut. Affected is an unknown function of the component VAIO Virtual Audio Driver. The manipulation leads to exposure of resource. This vulnerability is documented as CVE-2026-23763. The attack needs to be performed locally. There is not any exploit available.

Detailsinfo

A vulnerability was found in VB-Audio Matrix and Matrix Coconut (version now known). It has been rated as critical. This issue affects some unknown processing of the component VAIO Virtual Audio Driver. The manipulation with an unknown input leads to a exposure of resource vulnerability. Using CWE to declare the problem leads to CWE-668. The product exposes a resource to the wrong control sphere, providing unintended actors with inappropriate access to the resource. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

VB-Audio Matrix and Matrix Coconut (versions ending in 1.0.2.2 and 2.0.2.2 and earlier, respectively), contain a local privilege escalation vulnerability in the VBMatrix VAIO virtual audio driver (vbmatrixvaio64*_win10.sys). The driver allocates a 128-byte non-paged pool buffer and, upon receiving IOCTL 0x222060, maps it into user space using an MDL and MmMapLockedPagesSpecifyCache. Because the allocation size is not page-aligned, the mapping exposes the entire 0x1000-byte kernel page containing the buffer plus adjacent non-paged pool allocations with read/write permissions. An unprivileged local attacker can open a device handle (using the required 0x800 attribute flag), invoke the IOCTL to obtain the mapping, and then read or modify live kernel objects and pointers present on that page. This enables bypass of KASLR, arbitrary kernel memory read/write within the exposed page, corruption of kernel objects, and escalation to SYSTEM.

The weakness was released by Klaus Hahnenkamp. The advisory is shared at github.com. The identification of this vulnerability is CVE-2026-23763 since 01/15/2026. The exploitation is known to be easy. An attack has to be approached locally. Neither technical details nor an exploit are 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

CPE 2.3info

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CPE 2.2info

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