7.1

CVE-2025-21595

Media report

A Missing Release of Memory after Effective Lifetime vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS and Junos OS Evolved allows an adjacent, unauthenticated attacker to cause an FPC to crash, leading to Denial of Service (DoS).

On all Junos OS and Junos OS Evolved platforms, in an EVPN-VXLAN scenario, when specific ARP packets are received on an IPv4 network, or specific NDP packets are received on an IPv6 network, kernel heap memory leaks, which eventually leads to an FPC crash and restart.

This issue does not affect MX Series platforms.
Heap size growth on FPC can be seen using below command.


user@host> show chassis fpc
                    Temp CPU Utilization (%) CPU Utilization (%) Memory   Utilization (%)
Slot State           (C) Total Interrupt     1min   5min   15min   DRAM (MB)   Heap   Buffer
  0 Online           45     3         0       2       2      2       32768      19       0 <<<<<<< Heap increase in all fPCs


This issue affects Junos OS:

  *  All versions before 21.2R3-S7,
  *  21.4 versions before 21.4R3-S4,
  *  22.2 versions before 22.2R3-S1, 
  *  22.3 versions before 22.3R3-S1, 
  *  22.4 versions before 22.4R2-S2, 22.4R3.


and Junos OS Evolved:

  *  All versions before 21.2R3-S7-EVO,
  *  21.4-EVO versions before 21.4R3-S4-EVO,
  *  22.2-EVO versions before 22.2R3-S1-EVO, 
  *  22.3-EVO versions before 22.3R3-S1-EVO, 

  *  22.4-EVO versions before 22.4R3-EVO.

Verknüpft mit AI von unstrukturierten Daten zu bestehenden CPE der NVD
This information is available to logged-in users.
Daten sind bereitgestellt durch das CVE Programm von einer CVE Numbering Authority (CNA) (Unstrukturiert).
VendorJuniper Networks
≫
Product Junos OS
Default Statusunaffected
Version < 21.2R3-S7
Version 0
Status affected
Version < 21.4R3-S4
Version 21.4
Status affected
Version < 22.2R3-S1
Version 22.2
Status affected
Version < 22.3R3-S1
Version 22.3
Status affected
Version < 22.4R2-S2, 22.4R3
Version 22.4
Status affected
VendorJuniper Networks
≫
Product Junos OS Evolved
Default Statusunaffected
Version < 21.2R3-S7-EVO
Version 0
Status affected
Version < 21.4R3-S4-EVO
Version 21.4-EVO
Status affected
Version < 22.2R3-S1-EVO
Version 22.2-EVO
Status affected
Version < 22.3R3-S1-EVO
Version 22.3-EVO
Status affected
Version < 22.4R3-EVO
Version 22.4-EVO
Status affected
Zu dieser CVE wurde keine CISA KEV oder CERT.AT-Warnung gefunden.
EPSS Metriken
Type Source Score Percentile
EPSS FIRST.org 0.04% 0.087
CVSS Metriken
Source Base Score Exploit Score Impact Score Vector string
sirt@juniper.net 6.5 2.8 3.6
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
sirt@juniper.net 7.1 0 0
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
CWE-401 Missing Release of Memory after Effective Lifetime

The product does not sufficiently track and release allocated memory after it has been used, which slowly consumes remaining memory.