CVE-2026-57019 | Juniper Junos OS up to 25.2R1 Packet Forwarding Engine MQSS_CMERROR_LI_INT_REG_UNROLL_TAIL_LENGTH_OVF input validation

A vulnerability has been found in Juniper Junos OS up to 23.2R2-S5/23.4R2-S6/24.2R2-S3/24.4R2-S3/25.2R1 and classified as critical. This impacts an unknown function of the file /fpc/0/pfe/0/cm/0/MQSS(0)/0/MQSS_CMERROR_LI_INT_REG_UNROLL_TAIL_LENGTH_OVF of the component Packet Forwarding Engine. Performing a manipulation results in improper input validation.

This vulnerability is identified as CVE-2026-57019. The attack can be initiated remotely. There is not any exploit available.