7.1

CVE-2025-21595

Medienbericht
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
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Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Juniper ≫ Junos Version < 21.2
Juniper ≫ Junos Version21.2 Update-
Juniper ≫ Junos Version21.2 Updater1
Juniper ≫ Junos Version21.2 Updater1-s1
Juniper ≫ Junos Version21.2 Updater1-s2
Juniper ≫ Junos Version21.2 Updater2
Juniper ≫ Junos Version21.2 Updater2-s1
Juniper ≫ Junos Version21.2 Updater2-s2
Juniper ≫ Junos Version21.2 Updater3
Juniper ≫ Junos Version21.2 Updater3-s1
Juniper ≫ Junos Version21.2 Updater3-s2
Juniper ≫ Junos Version21.2 Updater3-s3
Juniper ≫ Junos Version21.2 Updater3-s4
Juniper ≫ Junos Version21.2 Updater3-s5
Juniper ≫ Junos Version21.2 Updater3-s6
Juniper ≫ Junos Version21.4 Update-
Juniper ≫ Junos Version21.4 Updater1
Juniper ≫ Junos Version21.4 Updater1-s1
Juniper ≫ Junos Version21.4 Updater1-s2
Juniper ≫ Junos Version21.4 Updater2
Juniper ≫ Junos Version21.4 Updater2-s1
Juniper ≫ Junos Version21.4 Updater2-s2
Juniper ≫ Junos Version21.4 Updater3
Juniper ≫ Junos Version21.4 Updater3-s1
Juniper ≫ Junos Version21.4 Updater3-s2
Juniper ≫ Junos Version21.4 Updater3-s3
Juniper ≫ Junos Version21.4 Updater3-s4
Juniper ≫ Junos Version22.2 Update-
Juniper ≫ Junos Version22.2 Updater1
Juniper ≫ Junos Version22.2 Updater1-s1
Juniper ≫ Junos Version22.2 Updater1-s2
Juniper ≫ Junos Version22.2 Updater2
Juniper ≫ Junos Version22.2 Updater2-s1
Juniper ≫ Junos Version22.2 Updater2-s2
Juniper ≫ Junos Version22.2 Updater3
Juniper ≫ Junos Version22.3 Update-
Juniper ≫ Junos Version22.3 Updater1
Juniper ≫ Junos Version22.3 Updater1-s1
Juniper ≫ Junos Version22.3 Updater1-s2
Juniper ≫ Junos Version22.3 Updater2
Juniper ≫ Junos Version22.3 Updater2-s1
Juniper ≫ Junos Version22.3 Updater2-s2
Juniper ≫ Junos Version22.3 Updater3
Juniper ≫ Junos Version22.4 Update-
Juniper ≫ Junos Version22.4 Updater1
Juniper ≫ Junos Version22.4 Updater1-s1
Juniper ≫ Junos Version22.4 Updater1-s2
Juniper ≫ Junos Version22.4 Updater2
Juniper ≫ Junos Version22.4 Updater2-s1
Juniper ≫ Junos Version22.4 Updater3
Juniper ≫ Junos Os Evolved Version < 21.2
Juniper ≫ Junos Os Evolved Version21.2 Update-
Juniper ≫ Junos Os Evolved Version21.2 Updater1
Juniper ≫ Junos Os Evolved Version21.2 Updater1-s1
Juniper ≫ Junos Os Evolved Version21.2 Updater1-s2
Juniper ≫ Junos Os Evolved Version21.2 Updater2
Juniper ≫ Junos Os Evolved Version21.2 Updater2-s1
Juniper ≫ Junos Os Evolved Version21.2 Updater2-s2
Juniper ≫ Junos Os Evolved Version21.2 Updater3
Juniper ≫ Junos Os Evolved Version21.2 Updater3-s1
Juniper ≫ Junos Os Evolved Version21.2 Updater3-s2
Juniper ≫ Junos Os Evolved Version21.2 Updater3-s3
Juniper ≫ Junos Os Evolved Version21.2 Updater3-s4
Juniper ≫ Junos Os Evolved Version21.2 Updater3-s5
Juniper ≫ Junos Os Evolved Version21.2 Updater3-s6
Juniper ≫ Junos Os Evolved Version21.4 Update-
Juniper ≫ Junos Os Evolved Version21.4 Updater1
Juniper ≫ Junos Os Evolved Version21.4 Updater1-s1
Juniper ≫ Junos Os Evolved Version21.4 Updater1-s2
Juniper ≫ Junos Os Evolved Version21.4 Updater2
Juniper ≫ Junos Os Evolved Version21.4 Updater2-s1
Juniper ≫ Junos Os Evolved Version21.4 Updater2-s2
Juniper ≫ Junos Os Evolved Version21.4 Updater3
Juniper ≫ Junos Os Evolved Version21.4 Updater3-s1
Juniper ≫ Junos Os Evolved Version21.4 Updater3-s2
Juniper ≫ Junos Os Evolved Version21.4 Updater3-s3
Juniper ≫ Junos Os Evolved Version21.4 Updater3-s4
Juniper ≫ Junos Os Evolved Version22.2 Update-
Juniper ≫ Junos Os Evolved Version22.2 Updater1
Juniper ≫ Junos Os Evolved Version22.2 Updater1-s1
Juniper ≫ Junos Os Evolved Version22.2 Updater1-s2
Juniper ≫ Junos Os Evolved Version22.2 Updater2
Juniper ≫ Junos Os Evolved Version22.2 Updater2-s1
Juniper ≫ Junos Os Evolved Version22.2 Updater2-s2
Juniper ≫ Junos Os Evolved Version22.2 Updater3
Juniper ≫ Junos Os Evolved Version22.3 Update-
Juniper ≫ Junos Os Evolved Version22.3 Updater1
Juniper ≫ Junos Os Evolved Version22.3 Updater1-s1
Juniper ≫ Junos Os Evolved Version22.3 Updater1-s2
Juniper ≫ Junos Os Evolved Version22.3 Updater2
Juniper ≫ Junos Os Evolved Version22.3 Updater2-s1
Juniper ≫ Junos Os Evolved Version22.3 Updater2-s2
Juniper ≫ Junos Os Evolved Version22.3 Updater3
Juniper ≫ Junos Os Evolved Version22.4 Update-
Juniper ≫ Junos Os Evolved Version22.4 Updater1
Juniper ≫ Junos Os Evolved Version22.4 Updater1-s1
Juniper ≫ Junos Os Evolved Version22.4 Updater1-s2
Juniper ≫ Junos Os Evolved Version22.4 Updater2
Juniper ≫ Junos Os Evolved Version22.4 Updater2-s1
Juniper ≫ Junos Os Evolved Version22.4 Updater2-s2
Zu dieser CVE wurde keine CISA KEV oder CERT.AT-Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.08% 0.226
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
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
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
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.