CVE-2026-77206

{
  "etk_id": "ETK-2026-1856",
  "cve_id": "CVE-2026-77206",
  "display_id": "CVE-2026-77206",
  "ghsa_id": "GHSA-37xg-hvw9-pr82",
  "euvd_id": "EUVD-2026-100748",
  "status": "published",
  "anchor_state": "anchored",
  "title": "Null pointer dereference in Libreswan IKEv2 EAP handling",
  "summary": "Libreswan IKEv2 handling contains a null-pointer dereference in an EAP-related authentication path. An unauthenticated peer able to reach IKEv2 can cause the pluto daemon to crash and restart, creating a denial-of-service condition, including where EAP is not configured.",
  "mitigation": "Restrict inbound IKEv2 access to trusted peers and networks until an upstream-fixed release can be deployed. Monitor pluto restarts and apply the vendor update after confirming the fixed version.",
  "vendor": "The Libreswan Project",
  "product": "libreswan",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 4.7, <= 5.3.2",
        ">= 5.4, <= 5.4"
      ],
      "ecosystem": null,
      "fixed_versions": [],
      "package_name": "libreswan",
      "purl": null
    }
  ],
  "cwes": null,
  "cvss_score": 7.5,
  "cvss_src": "cna_vendor",
  "cvss_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
  "epss_score": 0.0052,
  "epss_percentile": 0.4288,
  "epss_asof": "2026-10-20",
  "automation": "contextual",
  "check": false,
  "check_confidence_basis": null,
  "exploit": false,
  "pipeline_minutes": 47.83374105,
  "t0_at": "2026-10-13T21:28:11.498000+00:00",
  "signals": {
    "trigger_signal": {
      "at": "2026-10-13T21:28:11.498000+00:00",
      "days": 0,
      "is_lower_bound": false,
      "measured_at": "2026-10-13T21:28:11.498000+00:00",
      "url": "https://github.com/advisories/GHSA-37xg-hvw9-pr82"
    }
  }
}