{
  "cveId": "CVE-2018-8226",
  "url": "https://patchblox.com/security/cve/CVE-2018-8226",
  "summary": "CVE-2018-8226 is fixed in 14 products on 1 platform, first by KB4284880, released June 12, 2018. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "HTTP.sys Denial of Service Vulnerability",
  "description": "\u003Cp\u003EA denial of service vulnerability exists in the HTTP 2.0 protocol stack (HTTP.sys) when HTTP.sys improperly parses specially crafted HTTP 2.0 requests. An attacker who successfully exploited the vulnerability could create a denial of service condition, causing the target system to become unresponsive.\u003C/p\u003E\n\u003Cp\u003ETo exploit this vulnerability, an attacker could send a specially crafted HTTP packet to a target system, causing the affected system to become nonresponsive.\u003C/p\u003E\n\u003Cp\u003EThe update addresses the vulnerability by modifying how the Windows HTTP protocol stack handles HTTP 2.0 requests. Note that the denial of service vulnerability would not allow an attacker to execute code or to elevate user rights.\u003C/p\u003E",
  "published": "2018-06-12T07:00:00Z",
  "severity": "Important",
  "cvss": 5.3,
  "epss": 0.14388,
  "epssPercentile": 0.96639,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "exploitabilityAssessment": "Exploitation Unlikely",
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2018-8226",
  "fixes": [
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1607 for 32-bit Systems",
      "fixedVersion": "14393.2312",
      "fix": "KB4284880",
      "url": "https://patchblox.com/security/fix/microsoft/kb4284880",
      "released": "2018-06-12T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1607 for x64-based Systems",
      "fixedVersion": "14393.2312",
      "fix": "KB4284880",
      "url": "https://patchblox.com/security/fix/microsoft/kb4284880",
      "released": "2018-06-12T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1703 for 32-bit Systems",
      "fixedVersion": "15063.1155",
      "fix": "KB4284874",
      "url": "https://patchblox.com/security/fix/microsoft/kb4284874",
      "released": "2018-06-12T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1703 for x64-based Systems",
      "fixedVersion": "15063.1155",
      "fix": "KB4284874",
      "url": "https://patchblox.com/security/fix/microsoft/kb4284874",
      "released": "2018-06-12T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1709 for 32-bit Systems",
      "fixedVersion": "16299.492",
      "fix": "KB4284819",
      "url": "https://patchblox.com/security/fix/microsoft/kb4284819",
      "released": "2018-06-12T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1709 for x64-based Systems",
      "fixedVersion": "16299.492",
      "fix": "KB4284819",
      "url": "https://patchblox.com/security/fix/microsoft/kb4284819",
      "released": "2018-06-12T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1803 for 32-bit Systems",
      "fixedVersion": "17134.112",
      "fix": "KB4284835",
      "url": "https://patchblox.com/security/fix/microsoft/kb4284835",
      "released": "2018-06-12T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1803 for x64-based Systems",
      "fixedVersion": "17134.112",
      "fix": "KB4284835",
      "url": "https://patchblox.com/security/fix/microsoft/kb4284835",
      "released": "2018-06-12T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 for 32-bit Systems",
      "fixedVersion": "10240.17889",
      "fix": "KB4284860",
      "url": "https://patchblox.com/security/fix/microsoft/kb4284860",
      "released": "2018-06-12T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 for x64-based Systems",
      "fixedVersion": "10240.17889",
      "fix": "KB4284860",
      "url": "https://patchblox.com/security/fix/microsoft/kb4284860",
      "released": "2018-06-12T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2016",
      "fixedVersion": "14393.2312",
      "fix": "KB4284880",
      "url": "https://patchblox.com/security/fix/microsoft/kb4284880",
      "released": "2018-06-12T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2016 (Server Core installation)",
      "fixedVersion": "14393.2312",
      "fix": "KB4284880",
      "url": "https://patchblox.com/security/fix/microsoft/kb4284880",
      "released": "2018-06-12T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server, version 1709  (Server Core Installation)",
      "fixedVersion": "16299.492",
      "fix": "KB4284819",
      "url": "https://patchblox.com/security/fix/microsoft/kb4284819",
      "released": "2018-06-12T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server, version 1803  (Server Core Installation)",
      "fixedVersion": "17134.112",
      "fix": "KB4284835",
      "url": "https://patchblox.com/security/fix/microsoft/kb4284835",
      "released": "2018-06-12T00:00:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-07T18:46:35Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}