{"api_version":"1","generated_at":"2026-11-13T20:09:58+00:00","cve":"CVE-2026-129217","urls":{"html":"https://cve.report/CVE-2026-129217","api":"https://cve.report/api/cve/CVE-2026-129217.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-129217","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-129217"},"summary":{"title":"bgpd: out-of-bounds heap read and crash on NOTIFICATION Cease/Hard Reset with one data byte","description":"In FRRouting (FRR) 8.3 through 10.5.1, bgp_notify_decapsulate_hard_reset() in bgpd/bgp_packet.c does not validate the length of the data field of a received BGP NOTIFICATION Cease/Hard Reset message (RFC 8538). When the data field is exactly one byte long, the function reads one byte past the end of a heap buffer and the 16-bit length of the encapsulated data underflows to 65535, causing a 65535-byte out-of-bounds heap read followed by an assertion failure. A remote BGP peer that has established a session and negotiated the Graceful Restart capability with the Notification (N) bit can send such a message to crash the bgpd daemon, terminating all BGP sessions (denial of service). This is fixed in 10.0.5, 10.1.5, 10.2.6, 10.3.4, 10.4.3, 10.5.2 and 10.6.0.","state":"PUBLISHED","assigner":"NetDEF","published_at":"2026-11-13 19:19:32","updated_at":"2026-11-13 19:19:32"},"problem_types":["CWE-125","CWE-191","CWE-125 CWE-125 Out-of-bounds read","CWE-191 CWE-191 Integer underflow (wrap or wraparound)"],"metrics":[{"version":"4.0","source":"57a55968-44ac-464c-a794-6ba3baad09c4","type":"Secondary","score":"6","severity":"MEDIUM","vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:N/VC:L/VI:H/VA:H/SC:N/SI:N/SA:N/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","data":{"version":"4.0","vectorString":"CVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:N/VC:L/VI:H/VA:H/SC:N/SI:N/SA:N/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","baseScore":6,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"HIGH","attackRequirements":"PRESENT","privilegesRequired":"HIGH","userInteraction":"NONE","vulnConfidentialityImpact":"LOW","vulnIntegrityImpact":"HIGH","vulnAvailabilityImpact":"HIGH","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","exploitMaturity":"NOT_DEFINED","confidentialityRequirement":"NOT_DEFINED","integrityRequirement":"NOT_DEFINED","availabilityRequirement":"NOT_DEFINED","modifiedAttackVector":"NOT_DEFINED","modifiedAttackComplexity":"NOT_DEFINED","modifiedAttackRequirements":"NOT_DEFINED","modifiedPrivilegesRequired":"NOT_DEFINED","modifiedUserInteraction":"NOT_DEFINED","modifiedVulnConfidentialityImpact":"NOT_DEFINED","modifiedVulnIntegrityImpact":"NOT_DEFINED","modifiedVulnAvailabilityImpact":"NOT_DEFINED","modifiedSubConfidentialityImpact":"NOT_DEFINED","modifiedSubIntegrityImpact":"NOT_DEFINED","modifiedSubAvailabilityImpact":"NOT_DEFINED","Safety":"NOT_DEFINED","Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","valueDensity":"NOT_DEFINED","vulnerabilityResponseEffort":"NOT_DEFINED","providerUrgency":"NOT_DEFINED"}},{"version":"4.0","source":"CNA","type":"CVSS","score":"6","severity":"MEDIUM","vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:N/VC:L/VI:H/VA:H/SC:N/SI:N/SA:N","data":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"HIGH","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":6,"baseSeverity":"MEDIUM","exploitMaturity":"NOT_DEFINED","privilegesRequired":"HIGH","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:N/VC:L/VI:H/VA:H/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":"LOW","vulnIntegrityImpact":"HIGH","vulnerabilityResponseEffort":"NOT_DEFINED"}}],"references":[{"url":"https://github.com/FRRouting/frr/pull/20796","name":"https://github.com/FRRouting/frr/pull/20796","refsource":"57a55968-44ac-464c-a794-6ba3baad09c4","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://github.com/FRRouting/frr/issues/20793","name":"https://github.com/FRRouting/frr/issues/20793","refsource":"57a55968-44ac-464c-a794-6ba3baad09c4","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-129217","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-129217","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"FRRouting","product":"FRRouting","version":"affected 10.5.0 10.5.2 semver","platforms":[]},{"source":"CNA","vendor":"FRRouting","product":"FRRouting","version":"affected 10.4.0 10.4.3 semver","platforms":[]},{"source":"CNA","vendor":"FRRouting","product":"FRRouting","version":"affected 10.3 10.3.4 custom","platforms":[]},{"source":"CNA","vendor":"FRRouting","product":"FRRouting","version":"affected 10.2 10.2.6 custom","platforms":[]},{"source":"CNA","vendor":"FRRouting","product":"FRRouting","version":"affected 10.1 10.1.5 custom","platforms":[]},{"source":"CNA","vendor":"FRRouting","product":"FRRouting","version":"affected 8.3 10.0.5 custom","platforms":[]},{"source":"CNA","vendor":"FRRouting","product":"FRRouting","version":"unaffected 8.3 custom","platforms":[]}],"timeline":[{"source":"CNA","time":"2026-02-12T07:59:00.000Z","lang":"en","value":"Github Issue opened (no responsible disclosure)"}],"solutions":[{"source":"CNA","title":"","value":"Upgrade to a fixed version of FRRouting","time":"","lang":"en"}],"workarounds":[{"source":"CNA","title":"","value":"Graceful Restart Capability needs to be enabled. Disable the Capability with \"no bgp graceful-restart notification\" or \"bgp graceful-restart-disable\"","time":"","lang":"en"}],"exploits":[],"credits":[{"source":"CNA","value":"Fault Chain (https://faultchain.com/)","lang":"en"}],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","modules":["bgpd"],"product":"FRRouting","programFiles":["bgpd/bgp_packet.c"],"programRoutines":[{"name":"bgp_notify_decapsulate_hard_reset()"}],"repo":"https://github.com/frrouting/frr.git","vendor":"FRRouting","versions":[{"lessThan":"10.5.2","status":"affected","version":"10.5.0","versionType":"semver"},{"lessThan":"10.4.3","status":"affected","version":"10.4.0","versionType":"semver"},{"lessThan":"10.3.4","status":"affected","version":"10.3","versionType":"custom"},{"lessThan":"10.2.6","status":"affected","version":"10.2","versionType":"custom"},{"lessThan":"10.1.5","status":"affected","version":"10.1","versionType":"custom"},{"lessThan":"10.0.5","status":"affected","version":"8.3","versionType":"custom"},{"lessThan":"8.3","status":"unaffected","version":"0","versionType":"custom"}]}],"configurations":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"bgpd must be running with at least one BGP neighbor (or dynamic listen range) through which the attacker can establish a session, and the Graceful Restart capability with the Notification (N) bit must be negotiated in the OPEN exchange with that peer. This is the default configuration: \"bgp graceful-restart notification\" is enabled by default since FRR 8.3 and the Graceful Restart capability is advertised by default (helper mode). Instances configured with \"no bgp graceful-restart notification\" or \"bgp graceful-restart-disable\" are not affected."}],"value":"bgpd must be running with at least one BGP neighbor (or dynamic listen range) through which the attacker can establish a session, and the Graceful Restart capability with the Notification (N) bit must be negotiated in the OPEN exchange with that peer. This is the default configuration: \"bgp graceful-restart notification\" is enabled by default since FRR 8.3 and the Graceful Restart capability is advertised by default (helper mode). Instances configured with \"no bgp graceful-restart notification\" or \"bgp graceful-restart-disable\" are not affected."}],"credits":[{"lang":"en","type":"finder","value":"Fault Chain (https://faultchain.com/)"}],"descriptions":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"In FRRouting (FRR) 8.3 through 10.5.1, bgp_notify_decapsulate_hard_reset() in bgpd/bgp_packet.c does not validate the length of the data field of a received BGP NOTIFICATION Cease/Hard Reset message (RFC 8538). When the data field is exactly one byte long, the function reads one byte past the end of a heap buffer and the 16-bit length of the encapsulated data underflows to 65535, causing a 65535-byte out-of-bounds heap read followed by an assertion failure. A remote BGP peer that has established a session and negotiated the Graceful Restart capability with the Notification (N) bit can send such a message to crash the bgpd daemon, terminating all BGP sessions (denial of service). This is fixed in 10.0.5, 10.1.5, 10.2.6, 10.3.4, 10.4.3, 10.5.2 and 10.6.0."}],"value":"In FRRouting (FRR) 8.3 through 10.5.1, bgp_notify_decapsulate_hard_reset() in bgpd/bgp_packet.c does not validate the length of the data field of a received BGP NOTIFICATION Cease/Hard Reset message (RFC 8538). When the data field is exactly one byte long, the function reads one byte past the end of a heap buffer and the 16-bit length of the encapsulated data underflows to 65535, causing a 65535-byte out-of-bounds heap read followed by an assertion failure. A remote BGP peer that has established a session and negotiated the Graceful Restart capability with the Notification (N) bit can send such a message to crash the bgpd daemon, terminating all BGP sessions (denial of service). This is fixed in 10.0.5, 10.1.5, 10.2.6, 10.3.4, 10.4.3, 10.5.2 and 10.6.0."}],"impacts":[{"capecId":"CAPEC-540","descriptions":[{"lang":"en","value":"CAPEC-540 Overread Buffers"}]}],"metrics":[{"cvssV4_0":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"HIGH","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":6,"baseSeverity":"MEDIUM","exploitMaturity":"NOT_DEFINED","privilegesRequired":"HIGH","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:N/VC:L/VI:H/VA:H/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":"LOW","vulnIntegrityImpact":"HIGH","vulnerabilityResponseEffort":"NOT_DEFINED"},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-125","description":"CWE-125 Out-of-bounds read","lang":"en","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-191","description":"CWE-191 Integer underflow (wrap or wraparound)","lang":"en","type":"CWE"}]}],"providerMetadata":{"dateUpdated":"2026-11-13T19:06:40.219Z","orgId":"57a55968-44ac-464c-a794-6ba3baad09c4","shortName":"NetDEF"},"references":[{"tags":["issue-tracking"],"url":"https://github.com/FRRouting/frr/issues/20793"},{"tags":["patch"],"url":"https://github.com/FRRouting/frr/pull/20796"}],"solutions":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"Upgrade to a fixed version of FRRouting"}],"value":"Upgrade to a fixed version of FRRouting"}],"source":{"discovery":"UNKNOWN"},"timeline":[{"lang":"en","time":"2026-02-12T07:59:00.000Z","value":"Github Issue opened (no responsible disclosure)"}],"title":"bgpd: out-of-bounds heap read and crash on NOTIFICATION Cease/Hard Reset with one data byte","workarounds":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"Graceful Restart Capability needs to be enabled. Disable the Capability with \"no bgp graceful-restart notification\" or \"bgp graceful-restart-disable\""}],"value":"Graceful Restart Capability needs to be enabled. Disable the Capability with \"no bgp graceful-restart notification\" or \"bgp graceful-restart-disable\""}],"x_generator":{"engine":"Vulnogram 1.0.5"}}},"cveMetadata":{"assignerOrgId":"57a55968-44ac-464c-a794-6ba3baad09c4","assignerShortName":"NetDEF","cveId":"CVE-2026-129217","datePublished":"2026-11-13T19:06:40.219Z","dateReserved":"2026-11-13T19:02:49.870Z","dateUpdated":"2026-11-13T19:06:40.219Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-11-13 19:19:32","lastModifiedDate":"2026-11-13 19:19:32","problem_types":["CWE-125","CWE-191","CWE-125 CWE-125 Out-of-bounds read","CWE-191 CWE-191 Integer underflow (wrap or wraparound)"],"metrics":{"cvssMetricV40":[{"source":"57a55968-44ac-464c-a794-6ba3baad09c4","type":"Secondary","cvssData":{"version":"4.0","vectorString":"CVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:N/VC:L/VI:H/VA:H/SC:N/SI:N/SA:N/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","baseScore":6,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"HIGH","attackRequirements":"PRESENT","privilegesRequired":"HIGH","userInteraction":"NONE","vulnConfidentialityImpact":"LOW","vulnIntegrityImpact":"HIGH","vulnAvailabilityImpact":"HIGH","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","exploitMaturity":"NOT_DEFINED","confidentialityRequirement":"NOT_DEFINED","integrityRequirement":"NOT_DEFINED","availabilityRequirement":"NOT_DEFINED","modifiedAttackVector":"NOT_DEFINED","modifiedAttackComplexity":"NOT_DEFINED","modifiedAttackRequirements":"NOT_DEFINED","modifiedPrivilegesRequired":"NOT_DEFINED","modifiedUserInteraction":"NOT_DEFINED","modifiedVulnConfidentialityImpact":"NOT_DEFINED","modifiedVulnIntegrityImpact":"NOT_DEFINED","modifiedVulnAvailabilityImpact":"NOT_DEFINED","modifiedSubConfidentialityImpact":"NOT_DEFINED","modifiedSubIntegrityImpact":"NOT_DEFINED","modifiedSubAvailabilityImpact":"NOT_DEFINED","Safety":"NOT_DEFINED","Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","valueDensity":"NOT_DEFINED","vulnerabilityResponseEffort":"NOT_DEFINED","providerUrgency":"NOT_DEFINED"}}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"129217","Ordinal":"1","Title":"bgpd: out-of-bounds heap read and crash on NOTIFICATION Cease/Ha","CVE":"CVE-2026-129217","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"129217","Ordinal":"1","NoteData":"In FRRouting (FRR) 8.3 through 10.5.1, bgp_notify_decapsulate_hard_reset() in bgpd/bgp_packet.c does not validate the length of the data field of a received BGP NOTIFICATION Cease/Hard Reset message (RFC 8538). When the data field is exactly one byte long, the function reads one byte past the end of a heap buffer and the 16-bit length of the encapsulated data underflows to 65535, causing a 65535-byte out-of-bounds heap read followed by an assertion failure. A remote BGP peer that has established a session and negotiated the Graceful Restart capability with the Notification (N) bit can send such a message to crash the bgpd daemon, terminating all BGP sessions (denial of service). This is fixed in 10.0.5, 10.1.5, 10.2.6, 10.3.4, 10.4.3, 10.5.2 and 10.6.0.","Type":"Description","Title":"bgpd: out-of-bounds heap read and crash on NOTIFICATION Cease/Ha"}]}}}