{
  "cveId": "CVE-2026-77205",
  "url": "https://patchblox.com/security/cve/CVE-2026-77205",
  "summary": "CVE-2026-77205 is fixed in 2 products on 1 platform, first by RHSA-2026:89923, released October 27, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "libreswan: Libreswan in FIPS mode has a vulnerability where badly formed received certificates are rejected, but not deleted fro...",
  "description": "Libreswan in FIPS mode has a vulnerability where badly formed received certificates are rejected, but not deleted from the NSS cache. As a result, any real certificates with the same serial number are rejected as well. This can be abused to lock out legitimate peers from connecting. The add_decoded_cert() function missed a call to CERT_DestroyCertificate() due to an incorrect fix for CVE-2026-14957. Sending bogus certificates with new serial numbers could prevent the real certificates with those serial numbers from connecting until the service has restarted.",
  "published": "2026-10-05T00:00:00Z",
  "severity": "low",
  "cvss": 7.5,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
  "epss": 0.00183,
  "epssPercentile": 0.07944,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "libreswan",
      "release": "RHEL 10",
      "fixedVersion": "5.3.3-1.el10_2",
      "fix": "RHSA-2026:89923",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2026-89923",
      "released": "2026-10-27T21:16:57Z"
    },
    {
      "platform": "linux",
      "product": "libreswan",
      "release": "almalinux 10",
      "fixedVersion": "5.3.3-1.el10_2",
      "fix": "ALSA-2026:89923",
      "url": "https://patchblox.com/security/fix/linux/alsa-2026-89923",
      "released": "2026-11-07T00:40:04Z"
    },
    {
      "platform": "linux",
      "product": "libreswan",
      "release": "ol 10",
      "fixedVersion": "0:5.3.3-1.0.1.el10_2",
      "fix": "ELSA-2026-89923",
      "url": "https://patchblox.com/security/fix/linux/elsa-2026-89923",
      "released": "2026-11-07T00:59:15Z"
    },
    {
      "platform": "linux",
      "product": "libreswan",
      "release": "rocky 10",
      "fixedVersion": "0:5.3.3-1.el10_2",
      "fix": "RLSA-2026:89923",
      "url": "https://patchblox.com/security/fix/linux/rlsa-2026-89923",
      "released": "2026-11-07T00:39:51Z"
    },
    {
      "platform": "linux",
      "product": "libreswan-minimal",
      "release": "almalinux 10",
      "fixedVersion": "5.3.3-1.el10_2",
      "fix": "ALSA-2026:89923",
      "url": "https://patchblox.com/security/fix/linux/alsa-2026-89923",
      "released": "2026-11-07T00:40:04Z"
    },
    {
      "platform": "linux",
      "product": "libreswan-minimal",
      "release": "ol 10",
      "fixedVersion": "0:5.3.3-1.0.1.el10_2",
      "fix": "ELSA-2026-89923",
      "url": "https://patchblox.com/security/fix/linux/elsa-2026-89923",
      "released": "2026-11-07T00:59:15Z"
    }
  ],
  "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"
  }
}