{"schemaVersion":3,"id":"CVE-2026-37459","aliases":["UBUNTU-CVE-2026-37459","DEBIAN-CVE-2026-37459"],"status":"published","duplicateOf":null,"title":null,"description":"An integer underflow in FRRouting (FRR) stable/10.0 to stable/10.6 allows attackers to cause a Denial of Service (DoS) via supplying a crafted BGP UPDATE message.","dates":{"published":"2026-05-04T00:00:00.000Z","modified":"2026-07-15T01:02:29.780Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":7.5,"severity":"high","version":"3.1","versionLabel":"v3.1","source":"CVE.org","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","score":7.5,"severity":"high","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Ubuntu","score":7.5,"severity":"high","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","exploitability":10,"impact":6,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Debian","score":7.5,"severity":"high","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","exploitability":10,"impact":6,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":7.5,"severity":"high","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.00684,"percentile":0.51743,"severity":"low","asOf":"2026-10-20T00:00:00.000Z","change":{"pp":0.31299999999999994,"baselineDate":"2026-09-20T00:00:00.000Z","baselineScore":0.00371},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.00371,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.00371,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.00371,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.00371,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.00371,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.00371,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.00371,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00371,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00371,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00371,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00684,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00684,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00684,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00684,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00684,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00684,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00684,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00684,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00684,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00684,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00684,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00684,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00684,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00684,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00684,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00684,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00684,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00684,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00684,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00684,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00684,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00684,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00684,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00684,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00684,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00684,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00684,"percentile":0.51743}],"last30":[{"date":"2026-09-20T00:00:00.000Z","score":0.00371,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00371,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00371,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00371,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00684,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00684,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00684,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00684,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00684,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00684,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00684,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00684,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00684,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00684,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00684,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00684,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00684,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00684,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00684,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00684,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00684,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00684,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00684,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00684,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00684,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00684,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00684,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00684,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00684,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00684,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00684,"percentile":0.51743}]},"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","sources":[]},"exploits":[],"exploitCount":0,"weaknesses":[{"id":"CWE-400","name":"Uncontrolled Resource Consumption","description":"The product does not properly control the allocation and maintenance of a limited resource.","type":"weakness","status":"Draft","abstraction":"Class","likelihoodOfExploit":"High","url":"https://cwe.mitre.org/data/definitions/400.html"},{"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"}],"affected":[{"vendor":"debian","product":"frr","name":"frr","label":"frr","ecosystem":"Debian","cpePart":null,"purl":"pkg:deb/debian/frr","purlType":"deb","versions":[{"text":"< 10.6.0-2","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 10.6.0-2","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"frr","name":"frr","label":"frr","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/frr","purlType":"deb","versions":[{"text":"< 10.4.1-3ubuntu1.4","noFixRecorded":false,"fixedIn":null},{"text":"< 10.5.1-1ubuntu4.1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 10.4.1-3ubuntu1.4 | < 10.5.1-1ubuntu4.1","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"quagga","name":"quagga","label":"quagga","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/quagga","purlType":"deb","versions":[{"text":"All versions","noFixRecorded":true,"fixedIn":null}],"versionsText":"All versions (No fix recorded)","eol":null,"hubHref":null}],"affectedCount":3,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://github.com/FRRouting/frr/commit/693a2e02687cdc9d16501275e05136edea9650d9","label":"github.com/FRRouting/frr/commit/693a2e02687cdc9d16501275e05136edea9650d9","hostname":"github.com","tags":[]},{"url":"https://access.redhat.com/security/cve/CVE-2026-37459","label":"access.redhat.com/security/cve/CVE-2026-37459","hostname":"access.redhat.com","tags":["VDB Entry","X Refsource REDHAT"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2466513","label":"bugzilla.redhat.com/show_bug.cgi?id=2466513","hostname":"bugzilla.redhat.com","tags":["Issue Tracking","X Refsource REDHAT"]},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-37459.json","label":"security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-37459.json","hostname":"security.access.redhat.com","tags":["X Sadp Csaf Vex"]},{"url":"https://access.redhat.com/errata/RHSA-2026:24347","label":"access.redhat.com/errata/RHSA-2026:24347","hostname":"access.redhat.com","tags":["Vendor Advisory","X Refsource REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2026:24370","label":"access.redhat.com/errata/RHSA-2026:24370","hostname":"access.redhat.com","tags":["Vendor Advisory","X Refsource REDHAT"]},{"url":"https://ubuntu.com/security/CVE-2026-37459","label":"ubuntu.com/security/CVE-2026-37459","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-37459","label":"www.cve.org/CVERecord?id=CVE-2026-37459","hostname":"www.cve.org","tags":["REPORT"]},{"url":"https://ubuntu.com/security/notices/USN-8376-1","label":"ubuntu.com/security/notices/USN-8376-1","hostname":"ubuntu.com","tags":["Advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-37459","label":"security-tracker.debian.org/tracker/CVE-2026-37459","hostname":"security-tracker.debian.org","tags":["Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-37459","label":"nvd.nist.gov/vuln/detail/CVE-2026-37459","hostname":"nvd.nist.gov","tags":["Oval","Advisory"]}],"lineage":{"upstream":[],"downstream":["OPENSUSE-SU-2026:10721-1","RHSA-2026:24347","RHSA-2026:24370"],"duplicates":[],"related":["OPENSUSE-SU-2026:10721-1","USN-8376-1"]},"timeline":[{"kind":"published","date":"2026-05-04T00:00:00.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-07-15T01:02:29.780Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":30,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-20T17:42:48.630Z","stale":false,"partial":false}}