CVE-2025-30660 — Improper Check for Unusual or Exceptional Conditions in Networks Junos OS

An Improper Check for Unusual or Exceptional Conditions vulnerability in the Packet Forwarding Engine (pfe) of Juniper Networks Junos OS on MX Series allows an unauthenticated, network-based attacker to cause a Denial-of-Service (DoS).When processing a high rate of specific GRE traffic destined to the device, the respective PFE will hang causing traffic forwarding to stop. When this issue occurs the following logs can be observed: MQSS(0): LI-3: Received a parcel with more than 512B accompany…