Juniper Junos OS: Routing daemon crash via BGP route update
Summary
A flaw in the routing protocol daemon (rpd) of Junos OS and Junos OS Evolved allows an adjacent eBGP peer to crash the routing daemon via a BGP route update. The issue only applies when RIB sharding is enabled (system processes routing bgp rib-sharding). Crashing rpd disrupts the device's core routing function. Juniper SIRT is not aware of any malicious exploitation.
Affected
- Junos OS: releases before 23.2R2-S7.7, 23.4 before 23.4R2-S8.13, 24.2 before 24.2R2-S5.5, 24.4 before 24.4R2-S5, 25.2 before 25.2R2-S2, 25.4 before 25.4R1-S3, 26.2 before 26.2R1-S2
- Junos OS Evolved: releases before 23.2R2-S7.7-EVO, 23.4 before 23.4R2-S8.11-EVO, 24.2 before 24.2R2-S5.6-EVO, 24.4 before 24.4R2-S5-EVO, 25.2 before 25.2R2-S2-EVO, 25.4 before 25.4R1-S3-EVO, 26.2 before 26.2R1-S2-EVO
- Additional affected Junos OS Evolved entries: 23.4X100, 25.2X100 before 25.2X100-D35-EVO, 25.4X300 before 25.4X300-D40-EVO
- Only systems with RIB sharding enabled are vulnerable.
Fixed in
- Junos OS: 23.2R2-S7.7, 23.4R2-S8.13, 24.2R2-S5.5, 24.4R2-S5, 25.2R2-S2, 25.4R1-S3, 25.4R2, 26.2R1-S2, 26.2R2, 26.4R1 and all subsequent releases
- Junos OS Evolved: 23.2R2-S7.7-EVO, 23.4R2-S8.11-EVO, 24.2R2-S5.6-EVO, 24.4R2-S5-EVO, 25.2R2-S2-EVO, 25.2X100-D35-EVO, 25.4R1-S3-EVO, 25.4R2-EVO, 25.4X300-D40-EVO, 26.2R1-S2-EVO, 26.2R2-EVO, 26.4R1-EVO and all subsequent releases
- Junos OS 23.4X100: no fixed release listed in the excerpts; check the Juniper advisory.
Workaround
Unknown. Juniper lists no known workarounds. Disabling RIB sharding is not documented as a workaround in the sources.
Exploitation
Juniper SIRT is not aware of any malicious exploitation. CISA SSVC: exploitation none, automatable yes, technical impact partial. No public proof of concept was found.
Our recommendation
- Check whether RIB sharding is enabled (system processes routing bgp rib-sharding).
- Identify devices with eBGP peers and review which peers can send routes to them.
- Plan upgrades to the fixed releases listed in JSA112187 for your platform and train.
- Monitor rpd for unexpected restarts and review routing logs.
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- Juniper Security Advisory JSA112187 supportportal.juniper.net
- CVE record in CVEProject cvelistV5 release github.com
- OpenCVE entry for CVE-2026-102026 app.opencve.io
- VulnRichment entry for CVE-2026-102026 vulners.com
Researched and written up in English and German by an AI (Claude by Anthropic) based on NVD, CISA, EPSS and the sources listed. The vendor information is authoritative. Researched on 1 Nov 2026, 03:24.
Original description (NVD)
An Improper Control of a Resource Through its Lifetime vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows an adjacent eBGP peer to cause a routing-daemon crash via a BGP route update when RIB sharding is enabled.
NVD references (1)
Sources
The tracker combines official, freely usable data sources – updated continuously:
- NVD (NIST) – CVEs, rating (CVSS), affected products
- CISA KEV – vulnerabilities confirmed by CISA as actively exploited
- CISA Vulnrichment – CISA assessment (SSVC) in the official CVE record
- FIRST EPSS – probability of exploitation
- Microsoft MSRC – Patch Tuesday: vulnerabilities, severity, updates
- PoC-in-GitHub – public proof-of-concept repositories
- Metasploit (Rapid7) – modules of the Metasploit Framework
- Exploit-DB (OffSec) – archive of public exploits (links only)
- Patch days: official vendor pages (linked per vendor) (Vendor patch days)
This product uses data from the NVD API but is not endorsed or certified by the NVD. EPSS data © FIRST.org.
Affected? We can help.
We check whether your systems are affected, install updates and close the gap – continuously with the System Health Checker if you wish.