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CVE Record

CVE-2026-23761: VB-Audio Voicemeeter & Matrix Drivers DoS via Improper FILE_OBJECT FsContext Initialization

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.

MediumCVSS 6.9Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

This vulnerability lets any local user crash a Windows system running affected VB-Audio virtual audio drivers. It is a denial-of-service issue, not evidence of data theft or remote takeover. Business urgency depends on where these audio tools are installed, especially shared workstations, production streaming systems, labs, or kiosks.

Executive priority

Treat this as a targeted availability risk. It does not currently warrant emergency enterprise-wide response unless affected drivers are on critical or shared Windows systems, but it should be remediated during normal vulnerability cycles.

Technical view

Affected VB-Audio drivers can set FILE_OBJECT->FsContext to an invalid non-pointer value when opened with a special file attribute. Later operations forwarded down the audio stack may dereference it in kernel context, causing a BSoD such as SYSTEM_SERVICE_EXCEPTION with STATUS_ACCESS_VIOLATION.

Likely exposure

Exposure is limited to Windows systems with affected Voicemeeter, Voicemeeter Banana, Voicemeeter Potato, Matrix, or Matrix Coconut versions and their listed virtual audio drivers installed.

Exploitation context

The CVE source says exploitation is local, low complexity, unauthenticated, and requires no user interaction. KEV is false, and the provided bundle does not cite active exploitation in the wild.

Researcher notes

Evidence points to CWE-824 improper initialization in kernel driver FILE_OBJECT state. Public technical material exists, including an exploit-tagged reference, so validation should remain defensive and avoid reproducing crash paths on production systems.

Mitigation direction

  • Inventory endpoints for the affected VB-Audio products and listed driver filenames.
  • Check VB-Audio release notes and update affected installations per vendor guidance.
  • Remove affected VB-Audio products from systems where they are not required.
  • Prioritize shared, kiosk, studio, and production endpoints where local users can cause outages.

Validation and detection

  • Compare installed versions against the affected version thresholds in the CVE description.
  • Confirm whether listed VB-Audio driver files are present on Windows endpoints.
  • Review crash telemetry for SYSTEM_SERVICE_EXCEPTION or STATUS_ACCESS_VIOLATION involving the listed drivers.
  • Verify updated or removed endpoints no longer report affected product versions.
Prepared
Confidence
high
Sources
7

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.

cwe · low confidence lookup

CWE-824: Exact CWE lookup

Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.

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cve · low confidence lookup

CVE-2026-23761 mapping review

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Vulnerability profileCVE Program record
Severity
Medium
CVSS
6.9 (4.0)
Known Exploited
No
Published

Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

1CVSS vectors
3Timeline events
1ADP providers
6Source links

SSVC decision data

CISA-ADPCISA Coordinator
Timestamp
Version
2.0.3
Exploitation: pocAutomatable: noTechnical Impact: partial

CVSS vector scores

1 official score

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
6.9CVSS 4.0MediumCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N——VulnCheck

Vulnerability scoring details

Base CVSS 4.0 score

6.9Medium
CVSS 4.0 vector shape for CVE-2026-23761Attack VectorAttack ComplexityAttack RequirementsPrivileges RequiredUser InteractionVS ConfidentialityVS IntegrityVS AvailabilitySS ConfidentialitySS IntegritySS Availability

Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Attack Requirements
NonePresent
Privileges Required
NoneLowHigh
User Interaction
NonePassiveActive
VS Confidentiality
HighLowNone
VS Integrity
HighLowNone
VS Availability
HighLowNone
SS Confidentiality
HighLowNone
SS Integrity
HighLowNone
SS Availability
HighLowNone

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  2. CVE publishedCVE Program

    The CVE record was published.

  3. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

ADP provider summaries

CISA-ADPCISA ADP Vulnrichment
other:ssvc

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
VB-Audio SoftwareVoicemeeter (Standard)0unaffected
VB-Audio SoftwareVoicemeeter Banana0unaffected
VB-Audio SoftwareVoicemeeter Potato0unaffected
VB-Audio SoftwareMatrix0unaffected
VB-Audio SoftwareMatrix Coconut0unaffected
Weakness

CWE details

CWE-824

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.

CWE-824 · source CWE mapping

Access of Uninitialized Pointer

Access of Uninitialized Pointer represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.

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