CVE-2025-30647

published 2025-04-09

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…

high 7.1 CVSS 4.0

AV A AC L AT N PR N UI N VC N VI N VA H SC N SI N SA L E X CR X IR X AR X MAV X MAC X MAT X MPR X MUI X MVC X MVI X MVA X MSC X MSI X MSA X S X AU X R X V X RE X U X

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.

Affected

17 ranges

Vendor	Product	Version range	Fixed in
juniper	junos	< 21.2	21.2
juniper	junos	—	—
juniper	junos	—	—
juniper	junos	—	—
juniper	junos	—	—
juniper	junos	—	—
juniper	junos	—	—
juniper	junos	—	—
juniper	junos_os	—	—
juniper	mx_series	—	—
juniper_networks	junos_os	< 21.2R3-S9	21.2R3-S9
juniper_networks	junos_os	>= 21.4 < 21.4R3-S10	21.4R3-S10
juniper_networks	junos_os	>= 22.2 < 22.2R3-S6	22.2R3-S6
juniper_networks	junos_os	>= 22.4 < 22.4R3-S5	22.4R3-S5
juniper_networks	junos_os	>= 23.2 < 23.2R2-S3	23.2R2-S3
juniper_networks	junos_os	>= 23.4 < 23.4R2-S3	23.4R2-S3
juniper_networks	junos_os	>= 24.2 < 24.2R2	24.2R2

CWE-401