An Untrusted Pointer Dereference vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows a local, authenticated attacker with low privileges to cause a Denial-of-Service (DoS).

When the command 'show route < ( receive-protocol | advertising-protocol ) bgp > detail' is executed, and at least one of the routes in the intended output has specific attributes, this will cause an rpd crash and restart.

'show route ... extensive' is not affected.

This issue affects:

Junos OS: 

• all versions before 22.4R3-S8,
• 23.2 versions before 23.2R2-S5,
• 23.4 versions before 23.4R2-S5,
• 24.2 versions before 24.2R2-S2,
• 24.4 versions before 24.4R2;

Junos OS Evolved:

• all versions before 22.4R3-S8-EVO, 
• 23.2 versions before 23.2R2-S5-EVO,
• 23.4 versions before 23.4R2-S6-EVO,
• 24.2 versions before 24.2R2-S2-EVO,
• 24.4 versions before 24.4R2-EVO.

To be exposed to this issue a BGP peering needs to be configured via:

[ protocols bgp ... neighbor ... ]

Juniper SIRT is not aware of any malicious exploitation of this vulnerability.

This issue was seen during production usage.

The following software releases have been updated to resolve this specific issue:
Junos OS Evolved: 22.4R3-S8-EVO, 23.2R2-S5-EVO, 23.4R2-S6-EVO, 24.2R2-S2-EVO, 24.4R2-EVO, 25.2R1-EVO, and all subsequent releases;
Junos OS: 22.4R3-S8, 23.2R2-S5, 23.4R2-S5, 24.2R2-S2, 24.4R2, 25.2R1, and all subsequent releases.

This issue is being tracked as 1883803 which is visible on the Customer Support website.

Note: Juniper SIRT's policy is not to evaluate releases which are beyond End of Engineering (EOE) or End of Life (EOL).

Use access lists or firewall filters to limit access to the CLI only from trusted hosts and administrators.

Utilize CLI authorization to disallow execution of the 'show route' command with the 'detail' option.

2026-01-14: 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