CVE-2026-82210

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{"affected": [{"affectedData": [{"collectionURL": "https://github.com", "defaultStatus": "unaffected", "packageName": "apache/brpc", "packageURL": "pkg:github/apache/brpc", "product": "Apache bRPC", "vendor": "Apache Software Foundation", "versions": [{"lessThan": "1.18.0", "status": "affected", "version": "0", "versionType": "semver"}]}], "source": "security@apache.org"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Enforceable assertion in the streaming feature of Apache bRPC (version < 1.18.0) on all platforms allows a remote attacker to crash the server process by sending a malformed stream feedback frame.\n\nRoot Cause:\nWhen handling FRAME_TYPE_FEEDBACK frames, bRPC calls Stream::SetRemoteConsumed() which contains CHECK(_cur_buf_size > 0) and unconditionally asserts CHECK(buf.IsEmpty()) on the frame payload. A feedback frame that carries an unexpected payload, or a feedback frame received on a stream where flow control is disabled (cur_buf_size == 0), reaches these assertions. On failure, CHECK failures abort the process, allowing an unauthenticated single client (once a stream is established) to terminate the server and cause a denial of service.\n\nAffected Scenarios:\nUse bRPC server with the streaming control feature (Stream API) served from untrusted network.\n\nHow to Fix:\n1. Upgrade bRPC to version 1.18.0, which fixes this issue.\n2. Apply this patch: https://github.com/apache/brpc/pull/3494 \n\nThe fix rejects malformed feedback frames with EPROTO and closes only the affected stream instead of crashing the whole process, and it bounds buffer shrinking so cur_buf_size never drops to 0 while flow control is enabled."}, {"lang": "es", "value": "Una aserci\u00f3n exigible en la funcionalidad de streaming de Apache bRPC (versiones anteriores a la 1.18.0) en todas las plataformas permite a un atacante remoto causar una ca\u00edda del proceso del servidor enviando un marco de retroalimentaci\u00f3n de streaming malformado.\\n\\nCausa ra\u00edz:\\nAl manejar tramas FRAME_TYPE_FEEDBACK, bRPC llama a Stream::SetRemoteConsumed() que contiene CHECK(_cur_buf_size mayor que 0) y afirma incondicionalmente CHECK(buf.IsEmpty()) sobre la carga \u00fatil de la trama. Una trama de retroalimentaci\u00f3n que lleva una carga inesperada, o una trama de retroalimentaci\u00f3n recibida en un flujo donde el control de flujo est\u00e1 deshabilitado (cur_buf_size == 0), alcanza estas aserciones. En caso de fallo, los errores CHECK abortan el proceso, permitiendo a un \u00fanico cliente no autenticado (una vez establecido el flujo) terminar el servidor y provocar una denegaci\u00f3n de servicio.\\n\\nEscenarios afectados:\\nUtilizar el servidor bRPC con la funcionalidad de control de streaming (API Stream) expuesto desde una red no confiable.\\n\\nC\u00f3mo solucionar:\\n1. Actualizar bRPC a la versi\u00f3n 1.18.0, que corrige este problema.\\n2. Aplicar este parche: https://github.com/apache/brpc/pull/3494\\n\\nLa correcci\u00f3n rechaza tramas de retroalimentaci\u00f3n malformadas con EPROTO y cierra solo el flujo afectado en lugar de bloquear todo el proceso, y limita la reducci\u00f3n del b\u00fafer de modo que cur_buf_size nunca llegue a 0 mientras el control de flujo est\u00e1 habilitado."}], "id": "CVE-2026-82210", "lastModified": "2026-10-30T15:16:55.473", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-82210", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-10-30T14:25:32.031437Z", "version": "2.0.3"}}]}, "published": "2026-10-21T13:20:02.837", "references": [{"source": "security@apache.org", "url": "https://lists.apache.org/thread/2pf15ojj0vr7rtx95677kgtl1mx3gdgb"}], "sourceIdentifier": "security@apache.org", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-617"}], "source": "security@apache.org", "type": "Secondary"}]}

{}

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