CVE-2026-19380

Full vulnerability record from the local CVENow database.
Description

A vulnerability was identified in Mullvad wireguard.sys 0.10.1. The affected element is the function AdapterState of the component IOCTL Handler. Such manipulation leads to improper update of reference count. Local access is required to approach this attack. The exploit is publicly available and might be used. The vendor was contacted early about this disclosure.
Severity
LOW
CVSS score
1.8 (v4.0)
Vulnerability status
Deferred
Source identifier
[email protected]
Published
2026-08-10 01:16:48.163000
Last modified
2026-10-23 20:10:00.160000
View original CVE JSON
{
  "id": "CVE-2026-19380",
  "sourceIdentifier": "[email protected]",
  "published": "2026-08-10T01:16:48.163",
  "lastModified": "2026-10-23T20:10:00.160",
  "vulnStatus": "Deferred",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A vulnerability was identified in Mullvad wireguard.sys 0.10.1. The affected element is the function AdapterState of the component IOCTL Handler. Such manipulation leads to improper update of reference count. Local access is required to approach this attack. The exploit is publicly available and might be used. The vendor was contacted early about this disclosure."
    },
    {
      "lang": "es",
      "value": "Una vulnerabilidad fue identificada en Mullvad wireguard.sys 0.10.1. El elemento afectado es la función AdapterState del componente Gestor IOCTL. Dicha manipulación conduce a una actualización incorrecta del contador de referencias. Se requiere acceso local para llevar a cabo este ataque. El exploit está disponible públicamente y podría ser utilizado. El proveedor fue contactado con antelación sobre esta divulgación."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "Mullvad",
          "product": "wireguard.sys",
          "cpes": [
            "cpe:2.3:a:mullvad:wireguard.sys:*:*:*:*:*:*:*:*"
          ],
          "modules": [
            "IOCTL Handler"
          ],
          "versions": [
            {
              "version": "0.10.1",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
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        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "4.0",
          "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/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",
          "baseScore": 1.8,
          "baseSeverity": "LOW",
          "attackVector": "LOCAL",
          "attackComplexity": "LOW",
          "attackRequirements": "NONE",
          "privilegesRequired": "HIGH",
          "userInteraction": "NONE",
          "vulnConfidentialityImpact": "NONE",
          "vulnIntegrityImpact": "NONE",
          "vulnAvailabilityImpact": "LOW",
          "subConfidentialityImpact": "NONE",
          "subIntegrityImpact": "NONE",
          "subAvailabilityImpact": "NONE",
          "exploitMaturity": "PROOF_OF_CONCEPT",
          "confidentialityRequirement": "NOT_DEFINED",
          "integrityRequirement": "NOT_DEFINED",
          "availabilityRequirement": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "valueDensity": "NOT_DEFINED",
          "vulnerabilityResponseEffort": "NOT_DEFINED",
          "providerUrgency": "NOT_DEFINED"
        }
      }
    ],
    "cvssMetricV31": [
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        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
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          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "availabilityImpact": "LOW"
        },
        "exploitabilityScore": 0.8,
        "impactScore": 1.4
      }
    ],
    "cvssMetricV2": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "2.0",
          "vectorString": "AV:L/AC:L/Au:M/C:N/I:N/A:P",
          "baseScore": 1.4,
          "accessVector": "LOCAL",
          "accessComplexity": "LOW",
          "authentication": "MULTIPLE",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "availabilityImpact": "PARTIAL"
        },
        "baseSeverity": "LOW",
        "exploitabilityScore": 2.5,
        "impactScore": 2.9,
        "acInsufInfo": false,
        "obtainAllPrivilege": false,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-08-10T19:16:20.509820Z",
          "id": "CVE-2026-19380",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
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          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
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  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-664"
        },
        {
          "lang": "en",
          "value": "CWE-911"
        }
      ]
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  ],
  "references": [
    {
      "url": "https://drive.google.com/file/d/1LN68wxIx_2EI4IBVq13UlP4G1aqyz--x/view?usp=sharing",
      "source": "[email protected]"
    },
    {
      "url": "https://vuldb.com/cve/CVE-2026-19380",
      "source": "[email protected]"
    },
    {
      "url": "https://vuldb.com/submit/866726",
      "source": "[email protected]"
    },
    {
      "url": "https://vuldb.com/vuln/387273",
      "source": "[email protected]"
    },
    {
      "url": "https://vuldb.com/vuln/387273/cti",
      "source": "[email protected]"
    }
  ]
}