{
  "cveId": "CVE-2022-39173",
  "url": "https://patchblox.com/security/cve/CVE-2022-39173",
  "summary": "CVE-2022-39173 is fixed in wolfssl on 1 platform, first by DEBIAN-CVE-2022-39173, released September 29, 2022. It is not reported as exploited. Patch Radar priority: High.",
  "title": "wolfssl: In wolfSSL before 5.5.1, malicious clients can cause a buffer overflow during a TLS 1.3 handshake",
  "description": "In wolfSSL before 5.5.1, malicious clients can cause a buffer overflow during a TLS 1.3 handshake. This occurs when an attacker supposedly resumes a previous TLS session. During the resumption Client Hello a Hello Retry Request must be triggered. Both Client Hellos are required to contain a list of duplicate cipher suites to trigger the buffer overflow. In total, two Client Hellos have to be sent: one in the resumed session, and a second one as a response to a Hello Retry Request message.",
  "published": "2022-09-29T01:15:11Z",
  "severity": "high",
  "cvss": 7.5,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
  "epss": 0.05763,
  "epssPercentile": 0.93127,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "wolfssl",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "5.5.3-1",
      "fix": "DEBIAN-CVE-2022-39173",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2022-39173",
      "released": "2022-09-29T01:15:11Z"
    },
    {
      "platform": "linux",
      "product": "wolfssl",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "5.5.3-1",
      "fix": "DEBIAN-CVE-2022-39173",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2022-39173",
      "released": "2022-09-29T01:15:11Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T13:06:02Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}