CVE-2026-84782

{
  "etk_id": "ETK-2026-545",
  "cve_id": "CVE-2026-84782",
  "display_id": "CVE-2026-84782",
  "ghsa_id": "GHSA-6w84-hw79-7wgf",
  "euvd_id": "EUVD-2026-89013",
  "status": "published",
  "anchor_state": "anchored",
  "title": "OpenSSL DTLS retransmission out-of-bounds read",
  "summary": "OpenSSL DTLS handshake processing can read beyond a message buffer during retransmission, potentially disclosing heap data to the connected peer or causing a denial of service. The condition requires a fragmented handshake write to be paused because the transport cannot accept more data while retransmission is triggered before the write resumes.",
  "mitigation": "Update OpenSSL to a release containing the upstream DTLS retransmission fix; the evidence does not provide a fixed version number. Disable DTLS where feasible until the update is deployed, or limit DTLS access to trusted peers.",
  "vendor": "openssl",
  "product": "OpenSSL",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 4.0.0, < 4.0.3",
        ">= 3.6.0, < 3.6.5",
        ">= 3.5.0, < 3.5.9",
        ">= 3.4.0, < 3.4.8",
        ">= 3.0.0, < 3.0.23",
        ">= 1.1.1, < 1.1.1zj",
        ">= 1.0.2, < 1.0.2zs"
      ],
      "ecosystem": null,
      "fixed_versions": [
        "4.0.3",
        "3.6.5",
        "3.5.9",
        "3.4.8",
        "3.0.23",
        "1.1.1zj",
        "1.0.2zs"
      ],
      "package_name": "OpenSSL",
      "purl": null
    }
  ],
  "cwes": [
    125
  ],
  "cvss_score": 8.2,
  "cvss_src": "nvd",
  "cvss_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H",
  "epss_score": 0.0039,
  "epss_percentile": 0.3173,
  "epss_asof": "2026-10-20",
  "automation": "deterministic",
  "check": false,
  "check_confidence_basis": null,
  "exploit": false,
  "pipeline_minutes": 18.073522316666665,
  "t0_at": "2026-09-29T15:32:23.605000+00:00",
  "signals": {
    "trigger_signal": {
      "at": "2026-09-29T15:32:23.605000+00:00",
      "days": 0,
      "is_lower_bound": false,
      "measured_at": "2026-09-29T15:32:23.605000+00:00",
      "url": "https://thehackernews.com/2026/09/openssl-fixes-high-severity-dtls-flaw.html"
    }
  }
}