{
  "cveId": "CVE-2023-38171",
  "url": "https://patchblox.com/security/cve/CVE-2023-38171",
  "summary": "CVE-2023-38171 is fixed in 9 products on 2 platforms, first by PowerShell Preview 7.4.0.1, released December 20, 2022. It is not reported as exploited, but the vendor rates exploitation more likely. Patch Radar priority: Urgent.",
  "title": "Microsoft QUIC Denial of Service Vulnerability",
  "description": "Microsoft QUIC Denial of Service Vulnerability",
  "published": "2023-10-10T12:00:00Z",
  "severity": "Important",
  "cvss": 7.5,
  "cwe": "NULL Pointer Dereference",
  "epss": 0.71046,
  "epssPercentile": 0.99409,
  "priority": "Urgent",
  "priorityTier": 2,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "exploitabilityAssessment": "Exploitation More Likely",
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-38171",
  "fixes": [
    {
      "platform": "microsoft",
      "product": ".NET 7.0",
      "fixedVersion": "",
      "fix": "KB5032875",
      "url": "https://patchblox.com/security/fix/microsoft/kb5032875",
      "released": "2023-12-12T14:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 11 Version 22H2 for ARM64-based Systems",
      "fixedVersion": "22621.2428",
      "fix": "KB5031354",
      "url": "https://patchblox.com/security/fix/microsoft/kb5031354",
      "released": "2023-10-10T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 11 Version 22H2 for x64-based Systems",
      "fixedVersion": "22621.2428",
      "fix": "KB5031354",
      "url": "https://patchblox.com/security/fix/microsoft/kb5031354",
      "released": "2023-10-10T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 11 version 21H2 for ARM64-based Systems",
      "fixedVersion": "22000.2538",
      "fix": "KB5031358",
      "url": "https://patchblox.com/security/fix/microsoft/kb5031358",
      "released": "2023-10-10T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 11 version 21H2 for x64-based Systems",
      "fixedVersion": "22000.2538",
      "fix": "KB5031358",
      "url": "https://patchblox.com/security/fix/microsoft/kb5031358",
      "released": "2023-10-10T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2022",
      "fixedVersion": "20348.2031",
      "fix": "KB5031364",
      "url": "https://patchblox.com/security/fix/microsoft/kb5031364",
      "released": "2023-10-10T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2022 (Server Core installation)",
      "fixedVersion": "20348.2031",
      "fix": "KB5031364",
      "url": "https://patchblox.com/security/fix/microsoft/kb5031364",
      "released": "2023-10-10T00:00:00Z"
    },
    {
      "platform": "windows-app",
      "product": "PowerShell",
      "fixedVersion": "7.3.9.0",
      "fix": "PowerShell 7.3.9.0",
      "url": "https://patchblox.com/security/fix/windows-app/microsoft.powershell-7.3.9.0",
      "released": "2023-10-26T00:00:00Z"
    },
    {
      "platform": "windows-app",
      "product": "PowerShell Preview",
      "fixedVersion": "7.4.0.1",
      "fix": "PowerShell Preview 7.4.0.1",
      "url": "https://patchblox.com/security/fix/windows-app/microsoft.powershell.preview-7.4.0.1",
      "released": "2022-12-20T00:00:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T01:18:40Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}