{
  "cveId": "CVE-2019-1254",
  "url": "https://patchblox.com/security/cve/CVE-2019-1254",
  "summary": "CVE-2019-1254 is fixed in 12 products on 1 platform, first by KB4516044, released September 10, 2019. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "Windows Hyper-V Information Disclosure Vulnerability",
  "description": "\u003Cp\u003EAn information disclosure vulnerability exists when Windows Hyper-V writes uninitialized memory to disk. An attacker could exploit the vulnerability by reading a file to recover kernel memory.\u003C/p\u003E\n\u003Cp\u003ETo exploit the vulnerability, an attacker would first require access to a Hyper-V host.\u003C/p\u003E\n\u003Cp\u003EThe security update addresses the vulnerability by ensuring Hyper-V properly initializes memory before writing it to disk.\u003C/p\u003E",
  "published": "2019-09-10T12:00:00Z",
  "severity": "Important",
  "cvss": 5.5,
  "epss": 0.01326,
  "epssPercentile": 0.71148,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "exploitabilityAssessment": "Exploitation Less Likely",
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2019-1254",
  "fixes": [
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1607 for x64-based Systems",
      "fixedVersion": "14393.3204",
      "fix": "KB4516044",
      "url": "https://patchblox.com/security/fix/microsoft/kb4516044",
      "released": "2019-09-10T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1703 for x64-based Systems",
      "fixedVersion": "15063.2045",
      "fix": "KB4516068",
      "url": "https://patchblox.com/security/fix/microsoft/kb4516068",
      "released": "2019-09-10T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1709 for x64-based Systems",
      "fixedVersion": "16299.1387",
      "fix": "KB4516066",
      "url": "https://patchblox.com/security/fix/microsoft/kb4516066",
      "released": "2019-09-10T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1803 for x64-based Systems",
      "fixedVersion": "17134.1006",
      "fix": "KB4516058",
      "url": "https://patchblox.com/security/fix/microsoft/kb4516058",
      "released": "2019-09-10T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1809 for x64-based Systems",
      "fixedVersion": "17763.737",
      "fix": "KB4512578",
      "url": "https://patchblox.com/security/fix/microsoft/kb4512578",
      "released": "2019-09-10T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1903 for x64-based Systems",
      "fixedVersion": "18362.356",
      "fix": "KB4515384",
      "url": "https://patchblox.com/security/fix/microsoft/kb4515384",
      "released": "2019-09-10T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2016",
      "fixedVersion": "14393.3204",
      "fix": "KB4516044",
      "url": "https://patchblox.com/security/fix/microsoft/kb4516044",
      "released": "2019-09-10T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2016 (Server Core installation)",
      "fixedVersion": "14393.3204",
      "fix": "KB4516044",
      "url": "https://patchblox.com/security/fix/microsoft/kb4516044",
      "released": "2019-09-10T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2019",
      "fixedVersion": "17763.737",
      "fix": "KB4512578",
      "url": "https://patchblox.com/security/fix/microsoft/kb4512578",
      "released": "2019-09-10T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2019 (Server Core installation)",
      "fixedVersion": "17763.737",
      "fix": "KB4512578",
      "url": "https://patchblox.com/security/fix/microsoft/kb4512578",
      "released": "2019-09-10T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server, version 1803  (Server Core Installation)",
      "fixedVersion": "17134.1006",
      "fix": "KB4516058",
      "url": "https://patchblox.com/security/fix/microsoft/kb4516058",
      "released": "2019-09-10T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server, version 1903 (Server Core installation)",
      "fixedVersion": "18362.356",
      "fix": "KB4515384",
      "url": "https://patchblox.com/security/fix/microsoft/kb4515384",
      "released": "2019-09-10T00:00:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T00:53:09Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}