{
  "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-2020-1683",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2020-1683",
    "idYear": 2020,
    "status": "PUBLISHED",
    "publishedAt": "2020-10-16T20:31:35.862Z",
    "updatedAt": "2024-09-16T22:40:14.577Z",
    "importedAt": "2026-10-24T01:56:17.081Z",
    "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: Memory leak leads to kernel crash (vmcore) due to SNMP polling",
      "summary": "On Juniper Networks Junos OS devices, a specific SNMP OID poll causes a memory leak which over time leads to a kernel crash (vmcore). Prior to the kernel crash other processes might be impacted, such as failure to establish SSH connection to the device. The administrator can monitor the output of the following command to check if there is memory leak caused by this issue: user@device> show system virtual-memory | match \"pfe_ipc|kmem\" pfe_ipc 147 5K - 164352 16,32,64,8192 <-- increasing vm.kmem_map_free: 127246336 <-- decreasing pfe_ipc 0 0K - 18598 32,8192 vm.kmem_map_free: 134582272 This issue affects Juniper Networks Junos OS: 17.4R3; 18.1 version 18.1R3-S5 and later versions prior to 18.1R3-S10; 18.2 version 18.2R3 and later versions prior to 18.2R3-S3; 18.2X75 version 18.2X75-D420, 18.2X75-D50 and later versions prior to 18.2X75-D430, 18.2X75-D53, 18.2X75-D60; 18.3 version 18.3R3 and later versions prior to 18.3R3-S2; 18.4 version 18.4R1-S4, 18.4R2 and later versions prior to 18.4R2-S5, 18.4R3-S1; 19.1 version 19.1R2 and later versions prior to 19.1R2-S2, 19.1R3; 19.2 version 19.2R1 and later versions prior to 19.2R1-S5, 19.2R2; 19.3 versions prior to 19.3R2-S5, 19.3R3; 19.4 versions prior to 19.4R1-S3, 19.4R2. This issue does not affect Juniper Networks Junos OS prior to 17.4R3.",
      "affected": [
        {
          "vendor": "Juniper Networks",
          "product": "Junos OS",
          "versions": [
            {
              "version": "17.4R3",
              "status": "affected"
            },
            {
              "version": "unspecified",
              "status": "unaffected",
              "versionType": "custom",
              "lessThan": "17.4R3"
            },
            {
              "version": "18.1R3-S5",
              "status": "affected",
              "versionType": "custom",
              "lessThan": "18.1*",
              "changes": [
                {
                  "at": "18.1R3-S10",
                  "status": "unaffected"
                }
              ]
            },
            {
              "version": "18.2R3",
              "status": "affected",
              "versionType": "custom",
              "lessThan": "18.2*",
              "changes": [
                {
                  "at": "18.2R3-S3",
                  "status": "unaffected"
                }
              ]
            },
            {
              "version": "18.2X75-D420, 18.2X75-D50",
              "status": "affected",
              "versionType": "custom",
              "lessThan": "18.2X75*",
              "changes": [
                {
                  "at": "18.2X75-D430, 18.2X75-D53, 18.2X75-D60",
                  "status": "unaffected"
                }
              ]
            },
            {
              "version": "18.3R3",
              "status": "affected",
              "versionType": "custom",
              "lessThan": "18.3*",
              "changes": [
                {
                  "at": "18.3R3-S2",
                  "status": "unaffected"
                }
              ]
            },
            {
              "version": "18.4R1-S4, 18.4R2",
              "status": "affected",
              "versionType": "custom",
              "lessThan": "18.4*",
              "changes": [
                {
                  "at": "18.4R2-S5, 18.4R3-S1",
                  "status": "unaffected"
                }
              ]
            },
            {
              "version": "19.1R2",
              "status": "affected",
              "versionType": "custom",
              "lessThan": "19.1*",
              "changes": [
                {
                  "at": "19.1R2-S2, 19.1R3",
                  "status": "unaffected"
                }
              ]
            },
            {
              "version": "19.2R1",
              "status": "affected",
              "versionType": "custom",
              "lessThan": "19.2*",
              "changes": [
                {
                  "at": "19.2R1-S5, 19.2R2",
                  "status": "unaffected"
                }
              ]
            },
            {
              "version": "19.3",
              "status": "affected",
              "versionType": "custom",
              "lessThan": "19.3R2-S5, 19.3R3"
            },
            {
              "version": "19.4",
              "status": "affected",
              "versionType": "custom",
              "lessThan": "19.4R1-S3, 19.4R2"
            }
          ]
        }
      ]
    }
  }
}