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On QFX5K Series and MX Series, when the PFE receives a specific VxLAN packet the Layer 2 Address Learning Manager (L2ALM) process will crash leading to an FPC reboot. Continued receipt of this specific packet will create a sustained Denial of Service (DoS) condition. This issue affects Juniper Networks Junos OS on QFX5000 Series, MX Series: 20.3 versions prior to 20.3R3-S3; 20.4 versions prior to 20.4R3-S2; 21.2 versions prior to 21.2R2-S1. This issue does not affect Juniper Networks Junos OS: All versions prior to 20.3R1; 21.1 version 21.1R1 and later versions."}, {"lang": "es", "value": "Una vulnerabilidad de desreferencia de puntero NULL en el motor de reenv\u00edo de paquetes (PFE) de Junos OS de Juniper Networks en las series QFX5000 y MX permite a un atacante adyacente no autenticado causar una Denegaci\u00f3n de Servicio (DoS). 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