{"id":"CVE-2026-102051","state":"PUBLISHED","title":"Junos OS and Junos OS Evolved: An attacker causes l2cpd memory exhaustion when LLDP fast receive processing is enabled","description":"An Improper Release of Memory Before Removing Last Reference vulnerability in the l2cpd process of Juniper Networks Junos OS and Junos OS Evolved platforms allows an adjacent unauthenticated attacker to cause l2cpd memory exhaustion and Layer 2 control-plane disruption via LLDP traffic when fast receive processing is enabled.","publishedAt":"2026-10-14T16:53:49.981Z","updatedAt":"2026-10-14T20:26:09.286Z","severity":{"score":7.1,"label":"High","version":"4.0","vector":"CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/AU:Y/R:A/V:C/RE:M","source":"juniper"},"assigner":"juniper","products":["Juniper Networks Junos OS","Juniper Networks Junos OS Evolved"],"affected":[{"vendor":"Juniper Networks","product":"Junos OS","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"23.2R2-S7.7","versionType":"custom"},{"version":"23.4","status":"affected","lessThan":"23.4R2-S8.13","versionType":"custom"},{"version":"24.2","status":"affected","lessThan":"24.2R2-S5.5","versionType":"custom"},{"version":"24.4","status":"affected","lessThan":"24.4R2-S5","versionType":"custom"},{"version":"25.2","status":"affected","lessThan":"25.2R2-S2","versionType":"custom"},{"version":"25.4","status":"affected","lessThan":"25.4R1-S3","versionType":"custom"},{"version":"26.2","status":"affected","lessThan":"26.2R1-S2","versionType":"custom"}]},{"vendor":"Juniper Networks","product":"Junos OS Evolved","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"23.2R2-S7.7-EVO","versionType":"custom"},{"version":"23.4","status":"affected","lessThan":"23.4R2-S8.11-EVO","versionType":"custom"},{"version":"24.2","status":"affected","lessThan":"24.2R2-S5.6-EVO","versionType":"custom"},{"version":"24.4","status":"affected","lessThan":"24.4R2-S5-EVO","versionType":"custom"},{"version":"25.2","status":"affected","lessThan":"25.2R2-S2-EVO","versionType":"custom"},{"version":"25.4","status":"affected","lessThan":"25.4R1-S3-EVO","versionType":"custom"},{"version":"26.2","status":"affected","lessThan":"26.2R1-S2-EVO","versionType":"custom"},{"version":"23.4X100","status":"affected","versionType":"custom"},{"version":"25.2X100","status":"affected","lessThan":"25.2X100-D35-EVO","versionType":"custom"},{"version":"25.4X300","status":"affected","lessThan":"25.4X300-D40-EVO","versionType":"custom"}]}],"references":["https://supportportal.juniper.net/JSA112187"],"weaknesses":["CWE-401"],"ingestedAt":"2026-10-29T20:10:13.529Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/102xxx/CVE-2026-102051.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-102051","state":"PUBLISHED","datePublished":"2026-10-14T16:53:49.981Z","dateUpdated":"2026-10-14T20:26:09.286Z","assignerShortName":"juniper","assignerOrgId":"8cbe9d5a-a066-4c94-8978-4b15efeae968","dateReserved":"2026-09-28T17:35:40.522Z"},"containers":{"cna":{"title":"Junos OS and Junos OS Evolved: An attacker causes l2cpd memory exhaustion when LLDP fast receive processing is enabled","descriptions":[{"lang":"en","value":"An Improper Release of Memory Before Removing Last Reference vulnerability in the l2cpd process of Juniper Networks Junos OS and Junos OS Evolved platforms allows an adjacent unauthenticated attacker to cause l2cpd memory exhaustion and Layer 2 control-plane disruption via LLDP traffic when fast receive processing is enabled."}],"affected":[{"vendor":"Juniper Networks","product":"Junos 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Improper Release of Memory Before Removing Last Reference","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"juniper","orgId":"8cbe9d5a-a066-4c94-8978-4b15efeae968","dateUpdated":"2026-10-14T16:53:49.981Z"},"configurations":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"<tt>[ protocols lldp interface &lt;interface&gt; ]<br></tt><tt>[ protocols lldp fast-rx-processing ]</tt><tt>\n\n</tt>"}],"value":"[ protocols lldp interface <interface> ]\n[ protocols lldp fast-rx-processing ]"}],"datePublic":"2026-10-14T16:00:00.000Z","exploits":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"Juniper SIRT is not aware of any malicious exploitation of this vulnerability."}],"value":"Juniper SIRT is not aware of any malicious exploitation of this vulnerability."}],"solutions":[{"lang":"en","supportingMedia":[{"base64":true,"type":"text/html","value":"The following software releases have been updated to resolve this specific issue:<br>\n<br>\nJunos OS: 23.2R2-S7.7, 23.4R2-S8.13, 24.2R2-S5.5, 24.4R2-S5, 25.2R2-S2, 25.4R1-S3, 25.4R2, 26.2R1-S2, 26.2R2, 26.4R1, and all subsequent releases.<br><br>Junos OS Evolved: 23.2R2-S7.7-EVO, 23.4R2-S8.11-EVO, 24.2R2-S5.6-EVO, 24.4R2-S5-EVO, 25.2R2-S2-EVO, 25.2X100-D35-EVO, 25.4R1-S3-EVO, 25.4R2-EVO, 25.4X300-D40-EVO, 26.2R1-S2-EVO, 26.2R2-EVO, 26.4R1-EVO, and all subsequent releases.<br><br><b>Note:</b> For Junos OS releases 23.2, 23.4, and 24.2, and Junos OS Evolved releases 23.2-EVO, 23.4-EVO, and 24.2-EVO, specific respins have been referenced. Previously published versions of these releases have been rebuilt to resolve the security vulnerabilities identified in this advisory."}],"value":"The following software releases have been updated to resolve this specific issue:\n\n\n\nJunos OS: 23.2R2-S7.7, 23.4R2-S8.13, 24.2R2-S5.5, 24.4R2-S5, 25.2R2-S2, 25.4R1-S3, 25.4R2, 26.2R1-S2, 26.2R2, 26.4R1, and all subsequent releases.\n\nJunos OS Evolved: 23.2R2-S7.7-EVO, 23.4R2-S8.11-EVO, 24.2R2-S5.6-EVO, 24.4R2-S5-EVO, 25.2R2-S2-EVO, 25.2X100-D35-EVO, 25.4R1-S3-EVO, 25.4R2-EVO, 25.4X300-D40-EVO, 26.2R1-S2-EVO, 26.2R2-EVO, 26.4R1-EVO, and all subsequent releases.\n\nNote: For Junos OS releases 23.2, 23.4, and 24.2, and Junos OS Evolved releases 23.2-EVO, 23.4-EVO, and 24.2-EVO, specific respins have been referenced. Previously published versions of these releases have been rebuilt to resolve the security vulnerabilities identified in this advisory."}],"source":{"advisory":"JSA112187","defect":["1957373"],"discovery":"INTERNAL"},"workarounds":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"Do not configure \"set protocols lldp fast-rx-processing\"."}],"value":"Do not configure \"set protocols lldp fast-rx-processing\"."}],"x_generator":{"engine":"Vulnogram 0.1.0-dev"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2026-102051","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2026-10-14T20:04:54.586424Z"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-10-14T20:26:09.286Z"}}]}}}