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 a crash. 
   
           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.