{
  "schemaVersion": 1,
  "attribution": [
    {
      "source": "CISA Known Exploited Vulnerabilities",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "licence": "US government work"
    },
    {
      "source": "GitHub Advisory Database",
      "url": "https://github.com/advisories",
      "licence": "CC BY 4.0"
    },
    {
      "source": "Have I Been Pwned",
      "url": "https://haveibeenpwned.com/",
      "licence": "CC BY 4.0"
    },
    {
      "source": "CVE Program (CVE records)",
      "url": "https://www.cve.org/Legal/TermsOfUse",
      "licence": "CVE Terms of Use",
      "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.",
      "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy."
    },
    {
      "source": "FIRST EPSS",
      "url": "https://www.first.org/epss/",
      "licence": "free to use; FIRST requests attribution"
    }
  ],
  "record": {
    "id": "CVE-2024-39536",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2024-39536",
    "idYear": 2024,
    "status": "PUBLISHED",
    "publishedAt": "2024-07-11T16:13:24.485Z",
    "updatedAt": "2024-08-02T04:26:15.613Z",
    "importedAt": "2026-10-24T01:57:16.009Z",
    "snapshot": {
      "id": "cve_2026-10-24_midnight_baseline",
      "at": "2026-10-24T00:00:00.000Z",
      "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z"
    },
    "facts": {
      "title": "Junos OS and Junos OS Evolved: Flaps of BFD sessions with authentication cause a ppmd memory leak",
      "summary": "A Missing Release of Memory after Effective Lifetime vulnerability in the Periodic Packet Management Daemon (ppmd) of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated adjacent attacker to cause a \n\nDenial-of-Service (DoS).\n\n\nWhen a BFD session configured with authentication flaps, ppmd memory can leak. Whether the leak happens depends on a race condition which is outside the attackers control. This issue only affects BFD operating in distributed aka delegated (which is the default behavior) or inline mode.\n\n\n\nWhether the leak occurs can be monitored with the following CLI command:\n\n> show ppm request-queue\n\n\nFPC     Pending-request\nfpc0                   2\nrequest-total-pending: 2\n\n\nwhere a continuously increasing number of pending requests is indicative of the leak. \n\n\n\n\n\n\n\n\nThis issue affects:\n\nJunos OS:\n\n\n  *  All versions before 21.2R3-S8,\n  *  21.4 versions before 21.4R3-S7,\n  *  22.1 versions before 22.1R3-S4,\n  *  22.2 versions before 22.2R3-S4, \n  *  22.3 versions before 22.3R3,\n  *  22.4 versions before 22.4R2-S2, 22.4R3.\n\n\n\nJunos OS Evolved:\n  *  All versions before 21.2R3-S8-EVO,\n  *  21.4-EVO versions before 21.4R3-S7-EVO,\n  *  22.2-EVO versions before 22.2R3-S4-EVO,\n  *  22.3-EVO versions before 22.3R3-EVO,\n  *  22.4-EVO versions before 22.4R3-EVO.",
      "affected": [
        {
          "vendor": "Juniper Networks",
          "product": "Junos OS",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "0",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "21.2R3-S8"
            },
            {
              "version": "21.4",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "21.4R3-S7"
            },
            {
              "version": "22.1",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "22.1R3-S4"
            },
            {
              "version": "22.2",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "22.2R3-S4"
            },
            {
              "version": "22.3",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "22.3R3"
            },
            {
              "version": "22.4",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "22.4R2-S2, 22.4R3"
            }
          ]
        },
        {
          "vendor": "Juniper Networks",
          "product": "Junos OS Evolved",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "21.2-EVO",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "21.2R3-S8-EVO"
            },
            {
              "version": "21.4-EVO",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "21.4R3-S7-EVO"
            },
            {
              "version": "22.2-EVO",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "22.2R3-S4-EVO"
            },
            {
              "version": "22.3-EVO",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "22.3R3-EVO"
            },
            {
              "version": "22.4-EVO",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "22.4R3-EVO"
            },
            {
              "version": "23.2-EVO",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "23.2R1-EVO"
            }
          ]
        }
      ]
    }
  }
}