CVE-2026-33775

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When all memory \n\n<span style=\"background-color: rgb(255, 255, 255);\">available to bbe-smgd&nbsp;</span>has been consumed, no new subscribers will be able to login.<br><br>The memory utilization of bbe-smgd can be monitored with the following show command:<br><br><tt>user@host&gt; show system processes extensive | match bbe-smgd</tt><br><br>The below log message can be observed when this limit has been reached:<br><br><tt>bbesmgd[&lt;PID&gt;]: %DAEMON-3-SMD_DPROF_RSMON_ERROR: Resource unavailability, Reason: Daemon Heap Memory exhaustion</tt><br><br><br>This issue affects Junos OS on MX Series:<br><ul><li>all versions before 22.4R3-S8,</li><li>23.2 versions before 23.2R2-S5,</li><li>23.4 versions before 23.4R2-S6,</li><li>24.2 versions before 24.2R2-S2,</li><li>24.4 versions before 24.4R2,</li><li>25.2 versions before 25.2R2.</li></ul><br>"}], "value": "A Missing Release of Memory after Effective Lifetime vulnerability in the BroadBand Edge subscriber management daemon (bbe-smgd) of Juniper Networks Junos OS on MX Series allows an adjacent, unauthenticated attacker to cause a Denial of Service (DoS).\n\nIf the authentication packet-type option is configured and a received packet does not match that packet type, the memory leak occurs. 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When all memory \n\navailable to bbe-smgd\u00a0has been consumed, no new subscribers will be able to login.\n\nThe memory utilization of bbe-smgd can be monitored with the following show command:\n\nuser@host> show system processes extensive | match bbe-smgd\n\nThe below log message can be observed when this limit has been reached:\n\nbbesmgd[<PID>]: %DAEMON-3-SMD_DPROF_RSMON_ERROR: Resource unavailability, Reason: Daemon Heap Memory exhaustion\n\n\nThis issue affects Junos OS on MX Series:\n * all versions before 22.4R3-S8,\n * 23.2 versions before 23.2R2-S5,\n * 23.4 versions before 23.4R2-S6,\n * 24.2 versions before 24.2R2-S2,\n * 24.4 versions before 24.4R2,\n * 25.2 versions before 25.2R2.", "supportingMedia": [{"type": "text/html", "value": "A Missing Release of Memory after Effective Lifetime vulnerability in the BroadBand Edge subscriber management daemon (bbe-smgd) of Juniper Networks Junos OS on MX Series allows an adjacent, unauthenticated attacker to cause a Denial of Service (DoS).<br><br>If the authentication packet-type option is configured and a received packet does not match that packet type, the memory leak occurs. 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When all memory \n\navailable to bbe-smgd\u00a0has been consumed, no new subscribers will be able to login.\n\nThe memory utilization of bbe-smgd can be monitored with the following show command:\n\nuser@host> show system processes extensive | match bbe-smgd\n\nThe below log message can be observed when this limit has been reached:\n\nbbesmgd[<PID>]: %DAEMON-3-SMD_DPROF_RSMON_ERROR: Resource unavailability, Reason: Daemon Heap Memory exhaustion\n\n\nThis issue affects Junos OS on MX Series:\n * all versions before 22.4R3-S8,\n * 23.2 versions before 23.2R2-S5,\n * 23.4 versions before 23.4R2-S6,\n * 24.2 versions before 24.2R2-S2,\n * 24.4 versions before 24.4R2,\n * 25.2 versions before 25.2R2."}, {"lang": "es", "value": "Una vulnerabilidad de liberaci\u00f3n de memoria faltante despu\u00e9s de la vida \u00fatil efectiva en el demonio de gesti\u00f3n de suscriptores BroadBand Edge (bbe-smgd) de Juniper Networks Junos OS en la serie MX permite a un atacante adyacente y no autenticado causar una denegaci\u00f3n de servicio (DoS).\n\nSi la opci\u00f3n de tipo de paquete de autenticaci\u00f3n est\u00e1 configurada y un paquete recibido no coincide con ese tipo de paquete, se produce la fuga de memoria. Cuando toda la memoria disponible para bbe-smgd ha sido consumida, ning\u00fan nuevo suscriptor podr\u00e1 iniciar sesi\u00f3n.\n\nLa utilizaci\u00f3n de memoria de bbe-smgd se puede monitorear con el siguiente comando show:\n\nuser@host> show system processes extensive | match bbe-smgd\n\nEl siguiente mensaje de registro se puede observar cuando se ha alcanzado este l\u00edmite:\n\nbbesmgd[[PID]]: %DAEMON-3-SMD_DPROF_RSMON_ERROR: Resource unavailability, Reason: Daemon Heap Memory exhaustion\n\nEste problema afecta a Junos OS en la serie MX:\n * todas las versiones anteriores a 22.4R3-S8,\n * versiones 23.2 anteriores a 23.2R2-S5,\n * versiones 23.4 anteriores a 23.4R2-S6,\n * versiones 24.2 anteriores a 24.2R2-S2,\n * versiones 24.4 anteriores a 24.4R2,\n * versiones 25.2 anteriores a 25.2R2."}], "id": "CVE-2026-33775", "lastModified": "2026-10-26T22:10:00.163", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "ADJACENT_NETWORK", "availabilityImpact": "HIGH", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 3.6, "source": "sirt@juniper.net", "type": "Secondary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "YES", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "ADJACENT", "availabilityRequirement": "NOT_DEFINED", "baseScore": 7.1, "baseSeverity": "HIGH", "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": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "LOW", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "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/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:Y/R:X/V:X/RE:M/U:X", "version": "4.0", "vulnAvailabilityImpact": "HIGH", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "MODERATE"}, "source": "sirt@juniper.net", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-33775", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-04-13T17:40:06.427057Z", "version": "2.0.3"}}]}, "published": "2026-04-09T22:16:26.020", "references": [{"source": "sirt@juniper.net", "tags": ["Vendor Advisory"], "url": "https://kb.juniper.net/JSA107821"}], "sourceIdentifier": "sirt@juniper.net", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-401"}], "source": "sirt@juniper.net", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": ["mx_series"], "status": "affected", "versions": {"scheme": "generic", "value": "[0,22.4R3-S8)"}}, {"platform": ["mx_series"], "status": "affected", "versions": {"scheme": "generic", "value": "[23.2,23.2R2-S5)"}}, {"platform": ["mx_series"], "status": "affected", "versions": {"scheme": "generic", "value": "[23.4,23.4R2-S6)"}}, {"platform": ["mx_series"], "status": "affected", "versions": {"scheme": "generic", "value": "[24.2,24.2R2-S2)"}}, {"platform": ["mx_series"], "status": "affected", "versions": {"scheme": "generic", "value": "[24.4,24.4R2)"}}, {"platform": ["mx_series"], "status": "affected", "versions": {"scheme": "generic", "value": "[25.2,25.2R2)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Junos OS", "source": "cna", "vendor": "Juniper Networks"}, "product": "junos_os", "vendor": "juniper_networks"}], "analysis": {"en": {"generated_at": "2026-04-09T22:20:35.803652+00:00", "value": {"mitigation_remediation": ["Upgrade Junos OS to 22.4R3\u2011S8 or any later release that includes the fix.", "If the upgrade cannot be performed immediately, monitor bbe\u2011smgd memory usage using 'show system processes extensive | match bbe-smgd' and be prepared to restart the daemon or take the router offline if a memory exhaustion error is observed.", "Review and ensure that the authentication packet\u2011type option matches the network's actual packet types to avoid accidental triggers, although the definitive fix is the software upgrade."], "summary": {"action": "Apply Patch", "impact": "Denial of Service"}, "threat_synthesis": {"affected_systems": "The issue affects Juniper Networks Junos OS running on MX Series routers. Versions prior to 22.4R3\u2011S8, 23.2R2\u2011S5, 23.4R2\u2011S6, 24.2R2\u2011S2, 24.4R2, and 25.2R2 are impacted.", "description_and_impact": "The vulnerability is a missing release of memory after effective lifetime in the BroadBand Edge subscriber management daemon (bbe-smgd). When a subscriber authentication packet does not match the configured packet\u2011type option, memory leaks until the daemon's heap is exhausted, preventing new subscribers from logging in. This weakness corresponds to CWE\u2011401 (Improper Release of Memory).", "risk_and_exploitability": "The CVSS score of 7.1 indicates a high severity. The advisory notes that an adjacent, unauthenticated attacker can trigger the memory leak by sending a packet that mismatches the configured type. While EPSS data is unavailable and the vulnerability is not listed in the CISA KEV catalog, the lack of a workaround and the possibility of service disruption make timely remediation critical."}}}}, "created": "2026-04-10T08:37:04.166349+00:00", "updated": "2026-04-10T09:28:01.846429+00:00", "vendors": ["juniper_networks", "juniper_networks$PRODUCT$junos_os"]}