CVE-2026-23761 (GCVE-0-2026-23761)

Vulnerability from cvelistv5 – Published: 2026-01-22 16:17 – Updated: 2026-05-14 02:09
VLAI
Title
VB-Audio Voicemeeter & Matrix Drivers DoS via Improper FILE_OBJECT FsContext Initialization
Summary
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.
Severity
6.9 (Medium)
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
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-01-22 16:41 UTC
CWE
  • CWE-824 - Access of Uninitialized Pointer
Assigner
VulnCheck CNA under the mitre root
CNA scorecard B 84/100 over 7538 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
VB-Audio Software Voicemeeter (Standard) Affected: 0 , ≤ 1.1.1.9 (custom)
guessed Create a notification for this product.
VB-Audio Software Voicemeeter Banana Affected: 0 , ≤ 2.1.1.9 (custom)
guessed Create a notification for this product.
VB-Audio Software Voicemeeter Potato Affected: 0 , ≤ 3.1.1.9 (custom)
guessed Create a notification for this product.
VB-Audio Software Matrix Affected: 0 , ≤ 1.0.2.2 (custom)
guessed Create a notification for this product.
VB-Audio Software Matrix Coconut Affected: 0 , ≤ 2.0.2.2 (custom)
guessed Create a notification for this product.
Credits
Klaus Hahnenkamp
Show details on NVD website
To clipboard 

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              "product": "Voicemeeter Banana",
              "vendor": "VB-Audio Software",
              "versions": [
                {
                  "lessThanOrEqual": "2.1.1.9",
                  "status": "affected",
                  "version": "0",
                  "versionType": "custom"
                }
              ]
            },
            {
              "defaultStatus": "unaffected",
              "modules": [
                "vbvoicemeetervaio64*_win10.sys",
                "vbaudio_vmauxvaio*.sys",
                "vbaudio_vmvaio*.sys",
                "vbaudio_vmvaio3*.sys"
              ],
              "platforms": [
                "Windows"
              ],
              "product": "Voicemeeter Potato",
              "vendor": "VB-Audio Software",
              "versions": [
                {
                  "lessThanOrEqual": "3.1.1.9",
                  "status": "affected",
                  "version": "0",
                  "versionType": "custom"
                }
              ]
            },
            {
              "defaultStatus": "unaffected",
              "modules": [
                "vbmatrixvaio64*_win10.sys"
              ],
              "platforms": [
                "Windows"
              ],
              "product": "Matrix",
              "vendor": "VB-Audio Software",
              "versions": [
                {
                  "lessThanOrEqual": "1.0.2.2",
                  "status": "affected",
                  "version": "0",
                  "versionType": "custom"
                }
              ]
            },
            {
              "defaultStatus": "unaffected",
              "modules": [
                "vbmatrixvaio64*_win10.sys"
              ],
              "platforms": [
                "Windows"
              ],
              "product": "Matrix Coconut",
              "vendor": "VB-Audio Software",
              "versions": [
                {
                  "lessThanOrEqual": "2.0.2.2",
                  "status": "affected",
                  "version": "0",
                  "versionType": "custom"
                }
              ]
            }
          ],
          "cpeApplicability": [
            {
              "nodes": [
                {
                  "cpeMatch": [
                    {
                      "criteria": "cpe:2.3:a:twistedmatrix:twistedweb:*:*:*:*:*:*:*:*",
                      "versionEndIncluding": "1.0.2.2",
                      "vulnerable": true
                    }
                  ],
                  "negate": false,
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          ],
          "credits": [
            {
              "lang": "en",
              "type": "finder",
              "value": "Klaus Hahnenkamp"
            }
          ],
          "descriptions": [
            {
              "lang": "en",
              "supportingMedia": [
                {
                  "base64": false,
                  "type": "text/html",
                  "value": "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-\u0026gt;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."
                }
              ],
              "value": "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-\u003eFsContext 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."
            }
          ],
          "metrics": [
            {
              "cvssV4_0": {
                "Automatable": "NOT_DEFINED",
                "Recovery": "NOT_DEFINED",
                "Safety": "NOT_DEFINED",
                "attackComplexity": "LOW",
                "attackRequirements": "NONE",
                "attackVector": "LOCAL",
                "baseScore": 6.9,
                "baseSeverity": "MEDIUM",
                "exploitMaturity": "NOT_DEFINED",
                "privilegesRequired": "NONE",
                "providerUrgency": "NOT_DEFINED",
                "subAvailabilityImpact": "NONE",
                "subConfidentialityImpact": "NONE",
                "subIntegrityImpact": "NONE",
                "userInteraction": "NONE",
                "valueDensity": "NOT_DEFINED",
                "vectorString": "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",
                "version": "4.0",
                "vulnAvailabilityImpact": "HIGH",
                "vulnConfidentialityImpact": "NONE",
                "vulnIntegrityImpact": "NONE",
                "vulnerabilityResponseEffort": "NOT_DEFINED"
              },
              "format": "CVSS",
              "scenarios": [
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                  "lang": "en",
                  "value": "GENERAL"
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          "problemTypes": [
            {
              "descriptions": [
                {
                  "cweId": "CWE-824",
                  "description": "CWE-824 Access of Uninitialized Pointer",
                  "lang": "en",
                  "type": "CWE"
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-05-14T02:09:25.959Z",
            "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
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          "references": [
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              "url": "https://github.com/emkaix/security-research/tree/main/CVE-2026-23761"
            },
            {
              "tags": [
                "release-notes",
                "patch"
              ],
              "url": "https://forum.vb-audio.com/viewtopic.php?p=7574#p7574"
            },
            {
              "tags": [
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              ],
              "url": "https://forum.vb-audio.com/viewtopic.php?p=7527#p7527"
            },
            {
              "tags": [
                "product"
              ],
              "url": "https://vb-audio.com/"
            },
            {
              "tags": [
                "third-party-advisory"
              ],
              "url": "https://www.vulncheck.com/advisories/vb-audio-voicemeeter-and-matrix-drivers-dos-via-improper-file-object-fscontext-initialization"
            }
          ],
          "source": {
            "discovery": "UNKNOWN"
          },
          "title": "VB-Audio Voicemeeter \u0026 Matrix Drivers DoS via Improper FILE_OBJECT FsContext Initialization",
          "x_generator": {
            "engine": "Vulnogram 0.5.0"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "assignerShortName": "VulnCheck",
        "cveId": "CVE-2026-23761",
        "datePublished": "2026-01-22T16:17:49.527Z",
        "dateReserved": "2026-01-15T18:42:20.938Z",
        "dateUpdated": "2026-05-14T02:09:25.959Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.

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Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

JSON
How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.

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    Related by attack behaviour

    Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.