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CVE-2025-30647 – Juniper Networks Junos OS MX Series Memory Leak DoS Vulnerability

The following table lists the changes that have been made to the
CVE-2025-30647 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution
of a vulnerability, and for identifying the most recent changes that may
impact the vulnerability’s severity, exploitability, or other characteristics.

  • New CVE Received
    by [email protected]

    Apr. 09, 2025

    Action Type Old Value New Value
    Added Description 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.
    Added CVSS V4.0 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
    Added CVSS V3.1 AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
    Added CWE CWE-401
    Added Reference https://supportportal.juniper.net/JSA96457
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