8.7

CVE-2025-21599

Junos OS Evolved: Receipt of specifically malformed IPv6 packets causes kernel memory exhaustion leading to Denial of Service

A Missing Release of Memory after Effective Lifetime vulnerability in the Juniper Tunnel Driver (jtd) of Juniper Networks Junos OS Evolved allows an unauthenticated network-based attacker to cause Denial of Service. 

Receipt of specifically malformed IPv6 packets, destined to the device, causes kernel memory to not be freed, resulting in memory exhaustion leading to a system crash and Denial of Service (DoS). Continuous receipt and processing of these packets will continue to exhaust kernel memory, creating a sustained Denial of Service (DoS) condition.
This issue only affects systems configured with IPv6.

This issue affects Junos OS Evolved: 



  *  from 22.4-EVO before 22.4R3-S5-EVO, 
  *  from 23.2-EVO before 23.2R2-S2-EVO, 
  *  from 23.4-EVO before 23.4R2-S2-EVO, 
  *  from 24.2-EVO before 24.2R1-S2-EVO, 24.2R2-EVO.




This issue does not affect Juniper Networks Junos OS Evolved versions prior to 22.4R1-EVO.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Juniper ≫ Junos Os Evolved Version 22.4 Update -
Juniper ≫ Junos Os Evolved Version 22.4 Update r1
Juniper ≫ Junos Os Evolved Version 22.4 Update r1-s1
Juniper ≫ Junos Os Evolved Version 22.4 Update r1-s2
Juniper ≫ Junos Os Evolved Version 22.4 Update r2
Juniper ≫ Junos Os Evolved Version 22.4 Update r2-s1
Juniper ≫ Junos Os Evolved Version 22.4 Update r2-s2
Juniper ≫ Junos Os Evolved Version 22.4 Update r3
Juniper ≫ Junos Os Evolved Version 22.4 Update r3-s1
Juniper ≫ Junos Os Evolved Version 22.4 Update r3-s2
Juniper ≫ Junos Os Evolved Version 22.4 Update r3-s3
Juniper ≫ Junos Os Evolved Version 22.4 Update r3-s4
Juniper ≫ Junos Os Evolved Version 23.2 Update -
Juniper ≫ Junos Os Evolved Version 23.2 Update r1
Juniper ≫ Junos Os Evolved Version 23.2 Update r1-s1
Juniper ≫ Junos Os Evolved Version 23.2 Update r1-s2
Juniper ≫ Junos Os Evolved Version 23.2 Update r2
Juniper ≫ Junos Os Evolved Version 23.2 Update r2-s1
Juniper ≫ Junos Os Evolved Version 23.4 Update -
Juniper ≫ Junos Os Evolved Version 23.4 Update r1
Juniper ≫ Junos Os Evolved Version 23.4 Update r1-s1
Juniper ≫ Junos Os Evolved Version 23.4 Update r1-s2
Juniper ≫ Junos Os Evolved Version 23.4 Update r2
Juniper ≫ Junos Os Evolved Version 23.4 Update r2-s1
Juniper ≫ Junos Os Evolved Version 24.2 Update -
Juniper ≫ Junos Os Evolved Version 24.2 Update r1
Juniper ≫ Junos Os Evolved Version 24.2 Update r2
VulnDex Vulnerability Enrichment
Diese Information steht angemeldeten Benutzern zur Verfügung. Login Login
Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.61% 0.457
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
Juniper 8.7 0 0
CVSS:4.0/AV:N/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
Juniper 7.5 3.9 3.6
CVSS:3.1/AV:N/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, making the memory unavailable for reallocation and reuse.

https://supportportal.juniper.net/JSA92869
Vendor Advisory