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.

The following software releases have been updated to resolve this specific issue:

Junos OS Evolved: 22.4R3-S5-EVO, 23.2R2-S2-EVO, 23.4R2-S2-EVO, 24.2R1-S2-EVO, 24.2R2-EVO*, 24.4R1-EVO, and all subsequent releases.

* Future Release

2025-01-08: Initial Publication

• KB16613: Overview of the Juniper Networks SIRT Quarterly Security Bulletin Publication Process [juniper.net]
• KB16765: In which releases are vulnerabilities fixed? [juniper.net]
• KB16446: Common Vulnerability Scoring System (CVSS) and Juniper's Security Advisories [juniper.net]
• Report a Security Vulnerability - How to Contact the Juniper Networks Security Incident Response Team