CVE-2026-102044
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Reachable Assertion in Juniper Junos OS BGP-LS Peer

Publication date: 2026-10-14

Last updated on: 2026-10-14

Assigner: Juniper Networks, Inc.

Description
A Reachable Assertion vulnerability in the rpd process of Juniper Networks Junos OS and Junos OS Evolved allows a configured BGP-LS peer to cause a denial of service via a BGP-LS update.

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Meta Information

Published
2026-10-14
Last Modified
2026-10-14
Generated
2026-10-19
AI Q&A
2026-10-15
EPSS Evaluated
2026-10-18
NVD
CVE-2026-102044
EUVD
EUVD-2026-101368

Affected Vendors & Products

Showing 17 associated CPEs
Vendor Product Version / Range
Juniper Networks Junos OS 0
Juniper Networks Junos OS 23.4
Juniper Networks Junos OS 24.2
Juniper Networks Junos OS 24.4
Juniper Networks Junos OS 25.2
Juniper Networks Junos OS 25.4
Juniper Networks Junos OS 26.2
Juniper Networks Junos OS Evolved 0
Juniper Networks Junos OS Evolved 23.4
Juniper Networks Junos OS Evolved 24.2
Juniper Networks Junos OS Evolved 24.4
Juniper Networks Junos OS Evolved 25.2
Juniper Networks Junos OS Evolved 25.4
Juniper Networks Junos OS Evolved 26.2
Juniper Networks Junos OS Evolved 23.4X100
Juniper Networks Junos OS Evolved 25.2X100
Juniper Networks Junos OS Evolved 25.4X300

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-617 The product contains an assert() or similar statement that can be triggered by an attacker, which leads to an application exit or other behavior that is more severe than necessary.

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Executive Summary

This is a Reachable Assertion vulnerability in Juniper Networks Junos OS and Junos OS Evolved. It allows a configured BGP-LS peer to cause a denial of service by sending a BGP-LS update that triggers an assertion failure in the rpd process.

Detection Guidance

Detection requires monitoring the rpd process for crashes or abnormal behavior after receiving BGP-LS updates. Check logs for assertion failures in the BGP-LS subsystem. Juniper recommends enabling detailed logging for the rpd process and monitoring system stability during BGP-LS peer interactions.

Impact Analysis

The vulnerability can cause a denial of service, leading to network disruption or outages. Systems running affected Junos OS or Junos OS Evolved versions may become unresponsive or crash when processing malicious BGP-LS updates.

Compliance Impact

This vulnerability causes a denial of service via BGP-LS updates, which could disrupt network availability. Such disruptions may impact compliance with standards requiring continuous availability, such as HIPAA for healthcare systems or GDPR for data processing operations.

Mitigation Strategies

Immediate mitigation steps include disabling BGP-LS peering sessions with untrusted peers and applying Junos OS patches from Juniper Networks. Monitor rpd process logs for crashes or abnormal termination.

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