Junos OS and Junos OS Evolved: If in a traffic engineering scenario a specific valid BGP-LS attribute is received rpd crashes

Summary

An Incomplete List of Disallowed Inputs vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated, adjacent attacker to cause a Denial-of-Service (DoS). When in a BGP traffic engineering scenario a specific, valid, optional, non-transitive BGP update is received over an established BGP session, RPD crashes and automatically restarts, which leads to traffic impact until routing has reconverged. This issue affects: Junos OS: • All versions before 23.2R2-S6; • 23.4 versions before 23.4R2-S7; • 24.2 versions before 24.2R2-S4; • 24.4 versions before 24.4R2-S4; • 25.2 versions before 25.2R1-S2, 25.2R2; Junos OS Evolved: • All versions before 23.2R2-S6-EVO; • 23.4 versions before 23.4R2-S8.11-EVO; • 24.2 versions before 24.2R2-S4-EVO; • 24.4 versions before 24.4R2-S5-EVO; • 25.2 versions before 25.2R1-S2-EVO, 25.2R2-EVO;

Timeline

1. Oct 14, 2026, 4:23 PM UTCCVE published
2. Oct 14, 2026, 8:16 PM UTCCISA SSVC assessment

   Exploitation: none · Automatable: no · Technical impact: partial

3. Oct 14, 2026, 8:26 PM UTCRecord last updated

Affected versions

• Juniper Networks Junos OS

  fixed in 23.2R2-S6; From 23.4 · fixed in 23.4R2-S7; From 24.2 · fixed in 24.2R2-S4; From 24.4 · fixed in 24.4R2-S4; From 25.2 · fixed in 25.2R1-S2, 25.2R2

• Juniper Networks Junos OS Evolved

  fixed in 23.2R2-S6-EVO; From 23.4 · fixed in 23.4R2-S8.11-EVO; From 24.2 · fixed in 24.2R2-S4-EVO; From 24.4 · fixed in 24.4R2-S5-EVO; From 25.2 · fixed in 25.2R1-S2-EVO, 25.2R2-EVO

References 1