{"id":"CVE-2026-23761","state":"PUBLISHED","title":"VB-Audio Voicemeeter & Matrix Drivers DoS via Improper FILE_OBJECT FsContext Initialization","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). 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.","publishedAt":"2026-01-22T16:17:49.527Z","updatedAt":"2026-05-14T02:09:25.959Z","severity":{"score":6.9,"label":"Medium","version":"4.0","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","source":"VulnCheck"},"assigner":"VulnCheck","products":["VB-Audio Software Voicemeeter (Standard)","VB-Audio Software Voicemeeter Banana","VB-Audio Software Voicemeeter Potato","VB-Audio Software Matrix","VB-Audio Software Matrix Coconut"],"affected":[{"vendor":"VB-Audio Software","product":"Voicemeeter (Standard)","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThanOrEqual":"1.1.1.9","versionType":"custom"}],"modules":["vbvoicemeetervaio64*_win10.sys","vbaudio_vmauxvaio*.sys","vbaudio_vmvaio*.sys","vbaudio_vmvaio3*.sys"],"platforms":["Windows"]},{"vendor":"VB-Audio Software","product":"Voicemeeter Banana","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThanOrEqual":"2.1.1.9","versionType":"custom"}],"modules":["vbvoicemeetervaio64*_win10.sys","vbaudio_vmauxvaio*.sys","vbaudio_vmvaio*.sys","vbaudio_vmvaio3*.sys"],"platforms":["Windows"]},{"vendor":"VB-Audio Software","product":"Voicemeeter Potato","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThanOrEqual":"3.1.1.9","versionType":"custom"}],"modules":["vbvoicemeetervaio64*_win10.sys","vbaudio_vmauxvaio*.sys","vbaudio_vmvaio*.sys","vbaudio_vmvaio3*.sys"],"platforms":["Windows"]},{"vendor":"VB-Audio Software","product":"Matrix","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThanOrEqual":"1.0.2.2","versionType":"custom"}],"modules":["vbmatrixvaio64*_win10.sys"],"platforms":["Windows"]},{"vendor":"VB-Audio Software","product":"Matrix Coconut","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThanOrEqual":"2.0.2.2","versionType":"custom"}],"modules":["vbmatrixvaio64*_win10.sys"],"platforms":["Windows"]}],"references":["https://github.com/emkaix/security-research/tree/main/CVE-2026-23761","https://forum.vb-audio.com/viewtopic.php?p=7574#p7574","https://forum.vb-audio.com/viewtopic.php?p=7527#p7527","https://vb-audio.com/","https://www.vulncheck.com/advisories/vb-audio-voicemeeter-and-matrix-drivers-dos-via-improper-file-object-fscontext-initialization"],"weaknesses":["CWE-824"],"ingestedAt":"2026-10-29T20:11:21.040Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/23xxx/CVE-2026-23761.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-23761","state":"PUBLISHED","datePublished":"2026-01-22T16:17:49.527Z","dateUpdated":"2026-05-14T02:09:25.959Z","assignerShortName":"VulnCheck","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateReserved":"2026-01-15T18:42:20.938Z"},"containers":{"cna":{"title":"VB-Audio Voicemeeter & Matrix Drivers DoS via Improper FILE_OBJECT FsContext Initialization","descriptions":[{"lang":"en","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->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."}],"affected":[{"vendor":"VB-Audio Software","product":"Voicemeeter (Standard)","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThanOrEqual":"1.1.1.9","versionType":"custom"}],"modules":["vbvoicemeetervaio64*_win10.sys","vbaudio_vmauxvaio*.sys","vbaudio_vmvaio*.sys","vbaudio_vmvaio3*.sys"],"platforms":["Windows"]},{"vendor":"VB-Audio Software","product":"Voicemeeter Banana","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThanOrEqual":"2.1.1.9","versionType":"custom"}],"modules":["vbvoicemeetervaio64*_win10.sys","vbaudio_vmauxvaio*.sys","vbaudio_vmvaio*.sys","vbaudio_vmvaio3*.sys"],"platforms":["Windows"]},{"vendor":"VB-Audio Software","product":"Voicemeeter Potato","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThanOrEqual":"3.1.1.9","versionType":"custom"}],"modules":["vbvoicemeetervaio64*_win10.sys","vbaudio_vmauxvaio*.sys","vbaudio_vmvaio*.sys","vbaudio_vmvaio3*.sys"],"platforms":["Windows"]},{"vendor":"VB-Audio Software","product":"Matrix","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThanOrEqual":"1.0.2.2","versionType":"custom"}],"modules":["vbmatrixvaio64*_win10.sys"],"platforms":["Windows"]},{"vendor":"VB-Audio Software","product":"Matrix Coconut","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThanOrEqual":"2.0.2.2","versionType":"custom"}],"modules":["vbmatrixvaio64*_win10.sys"],"platforms":["Windows"]}],"references":[{"url":"https://github.com/emkaix/security-research/tree/main/CVE-2026-23761","tags":["technical-description","exploit"]},{"url":"https://forum.vb-audio.com/viewtopic.php?p=7574#p7574","tags":["release-notes","patch"]},{"url":"https://forum.vb-audio.com/viewtopic.php?p=7527#p7527","tags":["release-notes","patch"]},{"url":"https://vb-audio.com/","tags":["product"]},{"url":"https://www.vulncheck.com/advisories/vb-audio-voicemeeter-and-matrix-drivers-dos-via-improper-file-object-fscontext-initialization","tags":["third-party-advisory"]}],"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":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-824","description":"CWE-824 Access of Uninitialized Pointer","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"VulnCheck","orgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateUpdated":"2026-05-14T02:09:25.959Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:twistedmatrix:twistedweb:*:*:*:*:*:*:*:*","versionEndIncluding":"1.0.2.2"}]}]}],"credits":[{"lang":"en","type":"finder","value":"Klaus Hahnenkamp"}],"source":{"discovery":"UNKNOWN"},"x_generator":{"engine":"Vulnogram 0.5.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-01-22T16:41:19.114138Z","id":"CVE-2026-23761","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-01-22T16:41:39.558Z"}}]}}}