Juniper Junos OS: 2025-04 Security Bulletin: Junos OS: MX Series with AFT line card: Subscriber login/logout activity will lead to a memory leak (JSA96457) (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.