{
  "cveId": "CVE-2021-3597",
  "url": "https://patchblox.com/security/cve/CVE-2021-3597",
  "summary": "CVE-2021-3597 is fixed in undertow on 1 platform by DEBIAN-CVE-2021-3597 (version 2.2.10-1), released May 24, 2022. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "undertow: A flaw was found in undertow",
  "description": "A flaw was found in undertow. The HTTP2SourceChannel fails to write the final frame under some circumstances, resulting in a denial of service. The highest threat from this vulnerability is availability. This flaw affects Undertow versions prior to 2.0.35.SP1, prior to 2.2.6.SP1, prior to 2.2.7.SP1, prior to 2.0.36.SP1, prior to 2.2.9.Final and prior to 2.0.39.Final.",
  "published": "2022-05-24T19:15:09Z",
  "severity": "medium",
  "cvss": 5.9,
  "cvssVector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
  "epss": 0.01161,
  "epssPercentile": 0.6738,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "undertow",
      "release": "Debian 14",
      "fixedVersion": "2.2.10-1",
      "fix": "DEBIAN-CVE-2021-3597",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-3597",
      "released": "2022-05-24T19:15:09Z"
    }
  ],
  "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"
  }
}