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CVE Record

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

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.

MediumCVSS 6.8Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

A local Windows user can crash systems running affected VB-Audio Voicemeeter or Matrix virtual audio drivers. This is not described as data theft or remote compromise, but it can disrupt workstations, studios, support environments, or shared machines where untrusted local users can log in.

Executive priority

Treat this as a moderate availability risk, not a breach-class issue. Patch exposed workstations during the next maintenance window, sooner for shared systems where a local user could intentionally crash production audio or support operations.

Technical view

The drivers expose a length value in user-mapped memory. A low-privileged local attacker can corrupt that value, and later IOCTL handling uses it as the IoAllocateMdl length without adequate integrity checks, causing kernel crashes such as PAGE_FAULT_IN_NONPAGED_AREA. CVSS 4.0 score is 6.8, availability impact high.

Likely exposure

Exposure is limited to Windows systems with affected VB-Audio Voicemeeter Standard, Banana, Potato, Matrix, or Matrix Coconut driver versions installed. Highest concern is shared desktops, lab machines, streaming or audio-production workstations, and environments where non-admin local users have access.

Exploitation context

The CVE is not listed as KEV, and the source bundle does not show active exploitation. A public technical write-up is tagged as exploit material, so defenders should assume reproducibility may be possible while avoiding claims of in-the-wild use.

Researcher notes

Key issue is CWE-823: use of an out-of-range or corrupted length in kernel MDL allocation flow. The advisory describes local, low-complexity, low-privilege denial of service with no stated confidentiality or integrity impact. Affected version metadata in the bundle is sparse, so rely on the narrative version ranges and vendor notes.

Mitigation direction

  • Inventory installed VB-Audio Voicemeeter and Matrix products on Windows endpoints.
  • Upgrade to vendor releases newer than the affected version endings.
  • Remove unused VB-Audio virtual audio drivers from systems that do not need them.
  • Review VB-Audio release notes and advisories before fleet-wide remediation.
  • Prioritize shared or kiosk-like Windows systems with local user access.

Validation and detection

  • Check installed product versions against the affected version endings in the CVE description.
  • Look for affected driver filenames such as vbvoicemeetervaio64*.sys and vbmatrixvaio64*.sys.
  • Review crash telemetry for PAGE_FAULT_IN_NONPAGED_AREA on systems using these drivers.
  • Confirm updated drivers are loaded after installation or remediation.
  • Document any systems requiring deferred update due to audio workflow dependencies.
Prepared
Confidence
medium
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-823: 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-2026-23764 mapping review

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Vulnerability profileCVE Program record
Severity
Medium
CVSS
6.8 (4.0)
Known Exploited
No
Published

Vector: 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

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
6.8CVSS 4.0MediumCVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N——VulnCheck

Vulnerability scoring details

Base CVSS 4.0 score

6.8Medium
CVSS 4.0 vector shape for CVE-2026-23764Attack VectorAttack ComplexityAttack RequirementsPrivileges RequiredUser InteractionVS ConfidentialityVS IntegrityVS AvailabilitySS ConfidentialitySS IntegritySS Availability

Vector: 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

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-823

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

CWE-823 · source CWE mapping

Use of Out-of-range Pointer Offset

Use of Out-of-range Pointer Offset represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.

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