CVE-2025-30647

A Missing Release of Memory after Effective Lifetime 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).

In a subscriber management scenario, login/logout activity triggers a memory leak, and the leaked memory gradually increments and eventually results in acrash.
 
user@host> show chassis fpc
Temp  CPU Utilization (%) CPU Utilization (%)  Memory   Utilization (%)
Slot State   (C)  Total Interrupt    1min 5min 15min  DRAM (MB) Heap    Buffer

 2  Online    36    10      0     9    8    9   32768    26      0
                                                  

This issue affects Junos OS on MX Series: 
  *  All versions before 21.2R3-S9
  *  from 21.4 before 21.4R3-S10
  *  from 22.2 before 22.2R3-S6
  *  from 22.4 before 22.4R3-S5
  *  from 23.2 before 23.2R2-S3
  *  from 23.4 before 23.4R2-S3
  *  from 24.2 before 24.2R2.