# CVE-2026-23764: VB-Audio Voicemeeter & Matrix Drivers DoS via Corrupted IoAllocateMdl Length

> A local attacker can cause a system crash by corrupting a length value in virtual audio drivers, leading to a denial of service.

- **Severity:** Medium 6.8 (`CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 22 Jan 2026
- **Updated:** 14 May 2026
- **Also known as:** GHSA-vchc-7ph8-gwcp

## What is CVE-2026-23764?

CVE-2026-23764 is a medium-severity denial of service vulnerability in VB-Audio Software Matrix, published on 22 Jan 2026. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

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.

Weakness: CWE-823 (Use of Out-of-range Pointer Offset)

## Which versions are affected by CVE-2026-23764?


## How do I fix CVE-2026-23764?

No fix has been published for CVE-2026-23764 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-23764 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-23764 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-23764 and fix it if it is affected.

What it is: CVE-2026-23764 is a medium-severity denial of service vulnerability in VB-Audio Software Matrix, published on 22 Jan 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-23764 exists.

Affected product: VB-Audio Software Matrix. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-23764/ (Markdown: https://insights.sbomify.com/CVE-2026-23764/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-23764
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-23764
- OSV: https://osv.dev/vulnerability/CVE-2026-23764

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-23764/
Summaries are generated and may contain mistakes; the official description above is the record.