FKIE_CVE-2026-23763

Vulnerability from fkie_nvd - Published: 2026-01-22 17:16 - Updated: 2026-01-26 15:04
Severity ?
8.5 (High) - CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Summary
VB-Audio Matrix and Matrix Coconut (versions ending in 1.0.2.2 and 2.0.2.2 and earlier, respectively), contain a local privilege escalation vulnerability in the VBMatrix VAIO virtual audio driver (vbmatrixvaio64*_win10.sys). The driver allocates a 128-byte non-paged pool buffer and, upon receiving IOCTL 0x222060, maps it into user space using an MDL and MmMapLockedPagesSpecifyCache. Because the allocation size is not page-aligned, the mapping exposes the entire 0x1000-byte kernel page containing the buffer plus adjacent non-paged pool allocations with read/write permissions. An unprivileged local attacker can open a device handle (using the required 0x800 attribute flag), invoke the IOCTL to obtain the mapping, and then read or modify live kernel objects and pointers present on that page. This enables bypass of KASLR, arbitrary kernel memory read/write within the exposed page, corruption of kernel objects, and escalation to SYSTEM.
References
disclosure@vulncheck.comhttps://forum.vb-audio.com/viewtopic.php?p=7527#p7527
disclosure@vulncheck.comhttps://forum.vb-audio.com/viewtopic.php?p=7574#p7574
disclosure@vulncheck.comhttps://github.com/emkaix/security-research/tree/main/CVE-2026-23763
disclosure@vulncheck.comhttps://vb-audio.com/
disclosure@vulncheck.comhttps://www.vulncheck.com/advisories/vb-audio-matrix-drivers-local-privilege-escalation-via-kernel-memory-exposure
Impacted products
Vendor Product Version
To clipboard 

{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "VB-Audio Matrix and Matrix Coconut (versions ending in 1.0.2.2 and 2.0.2.2 and earlier, respectively), contain a local privilege escalation vulnerability in the VBMatrix VAIO virtual audio driver (vbmatrixvaio64*_win10.sys). The driver allocates a 128-byte non-paged pool buffer and, upon receiving IOCTL 0x222060, maps it into user space using an MDL and MmMapLockedPagesSpecifyCache. Because the allocation size is not page-aligned, the mapping exposes the entire 0x1000-byte kernel page containing the buffer plus adjacent non-paged pool allocations with read/write permissions. An unprivileged local attacker can open a device handle (using the required 0x800 attribute flag), invoke the IOCTL to obtain the mapping, and then read or modify live kernel objects and pointers present on that page. This enables bypass of KASLR, arbitrary kernel memory read/write within the exposed page, corruption of kernel objects, and escalation to SYSTEM."
    },
    {
      "lang": "es",
      "value": "VB-Audio Matrix y Matrix Coconut (versiones que terminan en 1.0.2.2 y 2.0.2.2 y anteriores, respectivamente), contienen una vulnerabilidad de escalada de privilegios local en el controlador de audio virtual VBMatrix VAIO (vbmatrixvaio64*_win10.sys). El controlador asigna un b\u00fafer de grupo no paginado de 128 bytes y, al recibir el IOCTL 0x222060, lo mapea en el espacio de usuario utilizando un MDL y MmMapLockedPagesSpecifyCache. Debido a que el tama\u00f1o de la asignaci\u00f3n no est\u00e1 alineado con la p\u00e1gina, el mapeo expone toda la p\u00e1gina del kernel de 0x1000 bytes que contiene el b\u00fafer m\u00e1s asignaciones adyacentes del grupo no paginado con permisos de lectura/escritura. Un atacante local sin privilegios puede abrir un identificador de dispositivo (utilizando el indicador de atributo 0x800 requerido), invocar el IOCTL para obtener el mapeo, y luego leer o modificar objetos y punteros del kernel en vivo presentes en esa p\u00e1gina. Esto permite el bypass de KASLR, lectura/escritura arbitraria de memoria del kernel dentro de la p\u00e1gina expuesta, corrupci\u00f3n de objetos del kernel, y escalada a SYSTEM."
    }
  ],
  "id": "CVE-2026-23763",
  "lastModified": "2026-01-26T15:04:14.850",
  "metrics": {
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "LOW",
          "attackRequirements": "NONE",
          "attackVector": "LOCAL",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 8.5,
          "baseSeverity": "HIGH",
          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "NOT_DEFINED",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "privilegesRequired": "LOW",
          "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:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
          "version": "4.0",
          "vulnAvailabilityImpact": "HIGH",
          "vulnConfidentialityImpact": "HIGH",
          "vulnIntegrityImpact": "HIGH",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "disclosure@vulncheck.com",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-01-22T17:16:37.620",
  "references": [
    {
      "source": "disclosure@vulncheck.com",
      "url": "https://forum.vb-audio.com/viewtopic.php?p=7527#p7527"
    },
    {
      "source": "disclosure@vulncheck.com",
      "url": "https://forum.vb-audio.com/viewtopic.php?p=7574#p7574"
    },
    {
      "source": "disclosure@vulncheck.com",
      "url": "https://github.com/emkaix/security-research/tree/main/CVE-2026-23763"
    },
    {
      "source": "disclosure@vulncheck.com",
      "url": "https://vb-audio.com/"
    },
    {
      "source": "disclosure@vulncheck.com",
      "url": "https://www.vulncheck.com/advisories/vb-audio-matrix-drivers-local-privilege-escalation-via-kernel-memory-exposure"
    }
  ],
  "sourceIdentifier": "disclosure@vulncheck.com",
  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-668"
        }
      ],
      "source": "disclosure@vulncheck.com",
      "type": "Primary"
    }
  ]
}


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