{"id":"CVE-2026-101987","state":"PUBLISHED","title":"Junos OS and Junos OS Evolved: A specific IS-IS SRv6 packet causes an rpd crash when flexible algorithm is used","description":"An Improper Validation of Specified Quantity in Input vulnerability in the routing daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows an adjacent attacker to cause a denial of service by sending a specific IS-IS SRv6 packet when SRv6 and Flexible Algorithm are enabled.","publishedAt":"2026-10-14T16:33:12.658Z","updatedAt":"2026-10-29T20:09:32.566Z","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","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-1284"],"ingestedAt":"2026-10-29T23:08:31.977Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/101xxx/CVE-2026-101987.json","commit":"dc7676b3f67d6707e4927968546e7e0125ff7ec7","baselineCommit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-101987","state":"PUBLISHED","datePublished":"2026-10-14T16:33:12.658Z","dateUpdated":"2026-10-29T20:09:32.566Z","assignerShortName":"juniper","assignerOrgId":"8cbe9d5a-a066-4c94-8978-4b15efeae968","dateReserved":"2026-09-28T16:31:35.504Z"},"containers":{"cna":{"title":"Junos OS and Junos OS Evolved: A specific IS-IS SRv6 packet causes an rpd crash when flexible algorithm is used","descriptions":[{"lang":"en","value":"An Improper Validation of Specified Quantity in Input vulnerability in the routing daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows an adjacent attacker to cause a denial of service by sending a specific IS-IS SRv6 packet when SRv6 and Flexible Algorithm are enabled."}],"affected":[{"vendor":"Juniper Networks","product":"Junos 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protocols isis source-packet-routing srv6 ]<br>[ routing-options flex-algorithm <N> ]<br>"}],"value":"[ protocols isis source-packet-routing srv6 ]\n[ routing-options flex-algorithm  ]"}],"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":["1954540"],"discovery":"INTERNAL"},"workarounds":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"There are no known workarounds for this issue."}],"value":"There are no known workarounds for this issue."}],"x_generator":{"engine":"Vulnogram 0.1.0-dev"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-10-14T20:15:38.635375Z","id":"CVE-2026-101987","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-1284","type":"CWE","lang":"en","description":"CWE-1284 Improper Validation of Specified Quantity in Input"}]}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-10-29T20:09:32.566Z"}}]}}}