CVE-2026-57019
Gravedad CVSS v4.0:
ALTA
Tipo:
No Disponible / Otro tipo
Fecha de publicación:
09/07/2026
Última modificación:
09/07/2026
Descripción
*** Pendiente de traducción *** An Improper Validation of Specified Quantity in Input vulnerability in the Packet Forwarding Engine (pfe) of Juniper Networks Junos OS on MX Series allows an unauthenticated, adjacent attacker to cause a Denial-of-Service (DoS).<br />
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When a specific packet is received from device in the same broadcast domain, an affected system calculates the packet size incorrectly. This causes further packet processing to fail, which triggers an FPC major error, resulting in a FPC reset impacting traffic until the FPC has automatically recovered.<br />
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Affected scenarios are: MAP-T, or non-IP traffic encapsulated in IP (e.g. MPLS over GRE).<br />
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When this issue happens the following logs can be observed:<br />
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fpc CMError: /fpc/0/pfe/0/cm/0/MQSS(0)/0/MQSS_CMERROR_LI_INT_REG_UNROLL_TAIL_LENGTH_OVF (0x2205eb), scope: pfe, category: functional, severity: major, module: MQSS(0), type: LI: Unroll TAIL length overflow, oc_category: default<br />
fpc Performing action reset-fru for error /fpc/0/pfe/0/cm/0/MQSS(0)/0/MQSS_CMERROR_LI_INT_REG_UNROLL_TAIL_LENGTH_OVF (0x2205eb) in module: MQSS(0) with scope: pfe category: functional level: major, oc_category: default<br />
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This issue affects Junos OS on MX Series:<br />
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* all versions before 23.2R2-S6,<br />
* 23.4 versions before 23.4R2-S7,<br />
* 24.2 versions before 24.2R2-S4,<br />
* 24.4 versions before 24.4R2-S4,<br />
* 25.2 versions before 25.2R2.
Impacto
Puntuación base 4.0
7.10
Gravedad 4.0
ALTA
Puntuación base 3.x
6.50
Gravedad 3.x
MEDIA