{"schemaVersion":1,"id":"CVE-2026-101980","requestedId":"CVE-2026-101980","aliases":[],"status":"published","rawState":"Received","rawSeverityStatus":"Received","duplicateOf":null,"indexable":true,"title":null,"description":"An Integer Underflow vulnerability in the kernel of Juniper Networks Junos OS with Extended Echo configured allows an unauthenticated, network-based attacker to cause a denial of service by a kernel crash.","dates":{"published":"2026-10-14T16:17:50.040Z","modified":"2026-10-14T16:17:50.040Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":9.8,"severity":"critical","version":"3.1","versionLabel":"v3.1","source":"cve.org","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","computed":false,"selection":"backend-summary"},"metrics":[{"version":"4.0","versionLabel":"v4.0","source":"cve.org","score":9.3,"severity":"critical","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:L","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"cve.org","score":9.8,"severity":"critical","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","exploitability":null,"impact":null,"computed":false},{"version":"4.0","versionLabel":"v4.0","source":"nvd","score":9.3,"severity":"critical","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"nvd","score":9.8,"severity":"critical","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":null,"percentile":null,"severity":"unknown","asOf":null,"change":{"pp":null,"baselineDate":null,"baselineScore":null},"history":[],"last30":[]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","evidence":[]},"exploits":[],"exploitCount":0,"exploitSources":[],"weaknesses":[{"id":"CWE-191","name":"Integer Underflow (Wrap or Wraparound)","description":"The product subtracts one value from another, such that the result is less than the minimum allowable integer value, which produces a value that is not equal to the correct result.","type":"weakness","status":"Draft","abstraction":"Base","likelihoodOfExploit":null,"url":"https://cwe.mitre.org/data/definitions/191.html","capec":[],"techniques":[],"countermeasures":[]}],"ttp":{"capecs":[],"techniques":[],"countermeasures":[],"countermeasuresByTactic":[]},"affected":[{"vendor":"juniper networks","product":"junos os","name":"Junos OS","label":"junos os","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"source":null,"versions":[{"text":"< 23.2R2-S7.7","noFixRecorded":false,"fixedIn":null},{"text":"≥ 23.4, < 23.4R2-S8.13","noFixRecorded":false,"fixedIn":null},{"text":"≥ 24.2, < 24.2R2-S5.5","noFixRecorded":false,"fixedIn":null},{"text":"≥ 24.4, < 24.4R2-S5","noFixRecorded":false,"fixedIn":null},{"text":"≥ 25.2, < 25.2R2-S2","noFixRecorded":false,"fixedIn":null},{"text":"≥ 25.4, < 25.4R1-S3","noFixRecorded":false,"fixedIn":null},{"text":"≥ 26.2, < 26.2R1-S2","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 23.2R2-S7.7 | ≥ 23.4, < 23.4R2-S8.13 | ≥ 24.2, < 24.2R2-S5.5 | ≥ 24.4, < 24.4R2-S5 | ≥ 25.2, < 25.2R2-S2 | ≥ 25.4, < 25.4R1-S3 | ≥ 26.2, < 26.2R1-S2","eol":null}],"affectedCount":1,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://supportportal.juniper.net/JSA112188","label":"supportportal.juniper.net/JSA112188","hostname":"supportportal.juniper.net","tags":["Vendor Advisory"],"sources":["cve.org","nvd"]}],"droppedReferenceCount":0,"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2026-10-14T16:17:50.040Z","label":"Published","detail":"Vulnerability first disclosed.","source":null}],"risk":{"score":70,"level":"high","profile":"default","profileName":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10},"appliedRules":["high-cvss-alone"]},"warnings":[],"meta":{"dataAsOf":"2026-10-14T19:51:23.199Z","stale":false,"partial":false}}