CVE-2026-129217

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-129217", "assignerOrgId": "57a55968-44ac-464c-a794-6ba3baad09c4", "state": "PUBLISHED", "assignerShortName": "NetDEF", "dateReserved": "2026-11-13T19:02:49.870Z", "datePublished": "2026-11-13T19:06:40.219Z", "dateUpdated": "2026-11-13T19:06:40.219Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "57a55968-44ac-464c-a794-6ba3baad09c4", "shortName": "NetDEF", "dateUpdated": "2026-11-13T19:06:40.219Z"}, "title": "bgpd: out-of-bounds heap read and crash on NOTIFICATION Cease/Hard Reset with one data byte", "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-125", "description": "CWE-125 Out-of-bounds read", "type": "CWE"}]}, {"descriptions": [{"lang": "en", "cweId": "CWE-191", "description": "CWE-191 Integer underflow (wrap or wraparound)", "type": "CWE"}]}], "impacts": [{"capecId": "CAPEC-540", "descriptions": [{"lang": "en", "value": "CAPEC-540 Overread Buffers"}]}], "affected": [{"vendor": "FRRouting", "product": "FRRouting", "repo": "https://github.com/frrouting/frr.git", "modules": ["bgpd"], "programFiles": ["bgpd/bgp_packet.c"], "programRoutines": [{"name": "bgp_notify_decapsulate_hard_reset()"}], "versions": [{"status": "affected", "version": "10.5.0", "lessThan": "10.5.2", "versionType": "semver"}, {"status": "affected", "version": "10.4.0", "lessThan": "10.4.3", "versionType": "semver"}, {"status": "affected", "version": "10.3", "lessThan": "10.3.4", "versionType": "custom"}, {"status": "affected", "version": "10.2", "lessThan": "10.2.6", "versionType": "custom"}, {"status": "affected", "version": "10.1", "lessThan": "10.1.5", "versionType": "custom"}, {"status": "affected", "version": "8.3", "lessThan": "10.0.5", "versionType": "custom"}, {"status": "unaffected", "version": "0", "lessThan": "8.3", "versionType": "custom"}], "defaultStatus": "unaffected"}], "descriptions": [{"lang": "en", "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.", "supportingMedia": [{"type": "text/html", "base64": false, "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."}]}], "references": [{"url": "https://github.com/FRRouting/frr/issues/20793", "tags": ["issue-tracking"]}, {"url": "https://github.com/FRRouting/frr/pull/20796", "tags": ["patch"]}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV4_0": {"attackVector": "NETWORK", "attackComplexity": "HIGH", "attackRequirements": "PRESENT", "privilegesRequired": "HIGH", "userInteraction": "NONE", "vulnConfidentialityImpact": "LOW", "subConfidentialityImpact": "NONE", "vulnIntegrityImpact": "HIGH", "subIntegrityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "version": "4.0", "baseSeverity": "MEDIUM", "baseScore": 6, "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"}}], "configurations": [{"lang": "en", "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.", "supportingMedia": [{"type": "text/html", "base64": false, "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."}]}], "workarounds": [{"lang": "en", "value": "Graceful Restart Capability needs to be enabled. Disable the Capability with\u00a0\"no bgp graceful-restart notification\"\u00a0or \"bgp graceful-restart-disable\"", "supportingMedia": [{"type": "text/html", "base64": false, "value": "Graceful Restart Capability needs to be enabled. Disable the Capability with \"no bgp graceful-restart notification\" or \"bgp graceful-restart-disable\""}]}], "solutions": [{"lang": "en", "value": "Upgrade to a fixed version of FRRouting", "supportingMedia": [{"type": "text/html", "base64": false, "value": "Upgrade to a fixed version of FRRouting"}]}], "timeline": [{"time": "2026-02-12T07:59:00.000Z", "lang": "en", "value": "Github Issue opened (no responsible disclosure)"}], "credits": [{"lang": "en", "value": "Fault Chain (https://faultchain.com/)", "type": "finder"}], "source": {"discovery": "UNKNOWN"}, "x_generator": {"engine": "Vulnogram 1.0.5"}}}}

{}

{"affected": [{"affectedData": [{"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"}]}], "source": "57a55968-44ac-464c-a794-6ba3baad09c4"}], "cveTags": [], "descriptions": [{"lang": "en", "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."}], "id": "CVE-2026-129217", "lastModified": "2026-11-13T19:19:32.050", "metrics": {"cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "HIGH", "attackRequirements": "PRESENT", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 6.0, "baseSeverity": "MEDIUM", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "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/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", "version": "4.0", "vulnAvailabilityImpact": "HIGH", "vulnConfidentialityImpact": "LOW", "vulnIntegrityImpact": "HIGH", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "57a55968-44ac-464c-a794-6ba3baad09c4", "type": "Secondary"}]}, "published": "2026-11-13T19:19:32.050", "references": [{"source": "57a55968-44ac-464c-a794-6ba3baad09c4", "url": "https://github.com/FRRouting/frr/issues/20793"}, {"source": "57a55968-44ac-464c-a794-6ba3baad09c4", "url": "https://github.com/FRRouting/frr/pull/20796"}], "sourceIdentifier": "57a55968-44ac-464c-a794-6ba3baad09c4", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-125"}, {"lang": "en", "value": "CWE-191"}], "source": "57a55968-44ac-464c-a794-6ba3baad09c4", "type": "Secondary"}]}

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