{
  "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-2025-21595",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2025-21595",
    "idYear": 2025,
    "status": "PUBLISHED",
    "publishedAt": "2025-04-09T19:50:28.091Z",
    "updatedAt": "2025-04-10T13:13:22.128Z",
    "importedAt": "2026-10-24T01:57:29.455Z",
    "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: In an EVPN-VXLAN scenario specific ARP or NDP packets cause FPC to crash",
      "summary": "A Missing Release of Memory after Effective Lifetime vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS and Junos OS Evolved allows an adjacent, unauthenticated attacker to cause an FPC to crash, leading to Denial of Service (DoS).\n\nOn all Junos OS and Junos OS Evolved platforms, in an EVPN-VXLAN scenario, when specific ARP packets are received on an IPv4 network, or specific NDP packets are received on an IPv6 network, kernel heap memory leaks, which eventually leads to an FPC crash and restart.\n\nThis issue does not affect MX Series platforms.\nHeap size growth on FPC can be seen using below command.\n\n\nuser@host> show chassis fpc\n                    Temp CPU Utilization (%) CPU Utilization (%) Memory   Utilization (%)\nSlot State           (C) Total Interrupt     1min   5min   15min   DRAM (MB)   Heap   Buffer\n  0 Online           45     3         0       2       2      2       32768      19       0 <<<<<<< Heap increase in all fPCs\n\n\nThis issue affects Junos OS:\n\n  *  All versions before 21.2R3-S7,\n  *  21.4 versions before 21.4R3-S4,\n  *  22.2 versions before 22.2R3-S1, \n  *  22.3 versions before 22.3R3-S1, \n  *  22.4 versions before 22.4R2-S2, 22.4R3.\n\n\nand Junos OS Evolved:\n\n  *  All versions before 21.2R3-S7-EVO,\n  *  21.4-EVO versions before 21.4R3-S4-EVO,\n  *  22.2-EVO versions before 22.2R3-S1-EVO, \n  *  22.3-EVO versions before 22.3R3-S1-EVO, \n\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-S7"
            },
            {
              "version": "21.4",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "21.4R3-S4"
            },
            {
              "version": "22.2",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "22.2R3-S1"
            },
            {
              "version": "22.3",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "22.3R3-S1"
            },
            {
              "version": "22.4",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "22.4R2-S2, 22.4R3"
            }
          ]
        },
        {
          "vendor": "Juniper Networks",
          "product": "Junos OS Evolved",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "0",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "21.2R3-S7-EVO"
            },
            {
              "version": "21.4-EVO",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "21.4R3-S4-EVO"
            },
            {
              "version": "22.2-EVO",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "22.2R3-S1-EVO"
            },
            {
              "version": "22.3-EVO",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "22.3R3-S1-EVO"
            },
            {
              "version": "22.4-EVO",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "22.4R3-EVO"
            }
          ]
        }
      ]
    }
  }
}