{
  "cveId": "CVE-2018-8438",
  "url": "https://patchblox.com/security/cve/CVE-2018-8438",
  "summary": "CVE-2018-8438 is fixed in 19 products on 1 platform, first by KB4457131, released September 11, 2018. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "Windows Hyper-V Denial of Service Vulnerability",
  "description": "\u003Cp\u003EA denial of service vulnerability exists when Microsoft Hyper-V Network Switch on a host server fails to properly validate input from a privileged user on a guest operating system. An attacker who successfully exploited the vulnerability could cause the host server to crash.\u003C/p\u003E\n\u003Cp\u003ETo exploit the vulnerability, an attacker who already has a privileged account on a guest operating system, running as a virtual machine, could run a specially crafted application that causes a host machine to crash.\u003C/p\u003E\n\u003Cp\u003EThe update addresses the vulnerability by modifying how virtual machines access the Hyper-V Network Switch.\u003C/p\u003E",
  "published": "2018-09-11T07:00:00Z",
  "severity": "Important",
  "cvss": 5.8,
  "epss": 0.07165,
  "epssPercentile": 0.94312,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "exploitabilityAssessment": "Exploitation Less Likely",
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2018-8438",
  "fixes": [
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1607 for 32-bit Systems",
      "fixedVersion": "14393.2485",
      "fix": "KB4457131",
      "url": "https://patchblox.com/security/fix/microsoft/kb4457131",
      "released": "2018-09-11T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1607 for x64-based Systems",
      "fixedVersion": "14393.2485",
      "fix": "KB4457131",
      "url": "https://patchblox.com/security/fix/microsoft/kb4457131",
      "released": "2018-09-11T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1703 for 32-bit Systems",
      "fixedVersion": "15063.1324",
      "fix": "KB4457138",
      "url": "https://patchblox.com/security/fix/microsoft/kb4457138",
      "released": "2018-09-11T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1703 for x64-based Systems",
      "fixedVersion": "15063.1324",
      "fix": "KB4457138",
      "url": "https://patchblox.com/security/fix/microsoft/kb4457138",
      "released": "2018-09-11T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1709 for 32-bit Systems",
      "fixedVersion": "16299.665",
      "fix": "KB4457142",
      "url": "https://patchblox.com/security/fix/microsoft/kb4457142",
      "released": "2018-09-11T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1709 for x64-based Systems",
      "fixedVersion": "16299.665",
      "fix": "KB4457142",
      "url": "https://patchblox.com/security/fix/microsoft/kb4457142",
      "released": "2018-09-11T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1803 for 32-bit Systems",
      "fixedVersion": "17134.285",
      "fix": "KB4457128",
      "url": "https://patchblox.com/security/fix/microsoft/kb4457128",
      "released": "2018-09-11T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1803 for x64-based Systems",
      "fixedVersion": "17134.285",
      "fix": "KB4457128",
      "url": "https://patchblox.com/security/fix/microsoft/kb4457128",
      "released": "2018-09-11T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 for 32-bit Systems",
      "fixedVersion": "10240.17976",
      "fix": "KB4457132",
      "url": "https://patchblox.com/security/fix/microsoft/kb4457132",
      "released": "2018-09-11T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 for x64-based Systems",
      "fixedVersion": "10240.17976",
      "fix": "KB4457132",
      "url": "https://patchblox.com/security/fix/microsoft/kb4457132",
      "released": "2018-09-11T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 8.1 for 32-bit systems",
      "fixedVersion": "",
      "fix": "KB4457129",
      "url": "https://patchblox.com/security/fix/microsoft/kb4457129",
      "released": "2018-09-11T07:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 8.1 for 32-bit systems",
      "fixedVersion": "",
      "fix": "KB4457143",
      "url": "https://patchblox.com/security/fix/microsoft/kb4457143",
      "released": "2018-09-11T07:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 8.1 for x64-based systems",
      "fixedVersion": "",
      "fix": "KB4457129",
      "url": "https://patchblox.com/security/fix/microsoft/kb4457129",
      "released": "2018-09-11T07:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 8.1 for x64-based systems",
      "fixedVersion": "",
      "fix": "KB4457143",
      "url": "https://patchblox.com/security/fix/microsoft/kb4457143",
      "released": "2018-09-11T07:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows RT 8.1",
      "fixedVersion": "",
      "fix": "KB4457129",
      "url": "https://patchblox.com/security/fix/microsoft/kb4457129",
      "released": "2018-09-11T07:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2012 R2",
      "fixedVersion": "",
      "fix": "KB4457129",
      "url": "https://patchblox.com/security/fix/microsoft/kb4457129",
      "released": "2018-09-11T07:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2012 R2",
      "fixedVersion": "",
      "fix": "KB4457143",
      "url": "https://patchblox.com/security/fix/microsoft/kb4457143",
      "released": "2018-09-11T07:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2012 R2 (Server Core installation)",
      "fixedVersion": "",
      "fix": "KB4457129",
      "url": "https://patchblox.com/security/fix/microsoft/kb4457129",
      "released": "2018-09-11T07:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2012 R2 (Server Core installation)",
      "fixedVersion": "",
      "fix": "KB4457143",
      "url": "https://patchblox.com/security/fix/microsoft/kb4457143",
      "released": "2018-09-11T07:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2016",
      "fixedVersion": "14393.2485",
      "fix": "KB4457131",
      "url": "https://patchblox.com/security/fix/microsoft/kb4457131",
      "released": "2018-09-11T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2016 (Server Core installation)",
      "fixedVersion": "14393.2485",
      "fix": "KB4457131",
      "url": "https://patchblox.com/security/fix/microsoft/kb4457131",
      "released": "2018-09-11T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server, version 1709  (Server Core Installation)",
      "fixedVersion": "16299.665",
      "fix": "KB4457142",
      "url": "https://patchblox.com/security/fix/microsoft/kb4457142",
      "released": "2018-09-11T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server, version 1803  (Server Core Installation)",
      "fixedVersion": "17134.285",
      "fix": "KB4457128",
      "url": "https://patchblox.com/security/fix/microsoft/kb4457128",
      "released": "2018-09-11T00:00:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-07T12:40:37Z"
}