CVE-2026-101972

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Integer Overflow in Juniper Networks Junos OS Routing Protocol Daemon

Publication date: 2026-10-14

Last updated on: 2026-10-14

Assigner: Juniper Networks, Inc.

Description

An Integer Overflow or Wraparound 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 via specific OSPFv2 packets sent on an OSPF-enabled interface.

CVSS Scores

EPSS Scores

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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-2026-101972

EUVD

EUVD-2026-101412

Affected Vendors & Products

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

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-190	The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.

Attack-Flow Graph

Executive Summary

This is an Integer Overflow or Wraparound vulnerability in Juniper Networks Junos OS and Junos OS Evolved. It affects the routing protocol daemon (rpd) and can be exploited by an unauthenticated adjacent attacker sending specific OSPFv2 packets on an OSPF-enabled interface. This causes a denial of service.

Detection Guidance

This vulnerability can be detected by monitoring for unexpected OSPFv2 packet processing failures or crashes in the routing protocol daemon (rpd) on Juniper Junos OS or Junos OS Evolved devices. Check logs for rpd crashes or error messages related to OSPFv2 packet handling. Juniper recommends inspecting OSPFv2 packet captures for malformed or unusually large packets that could trigger an integer overflow.

Impact Analysis

The vulnerability can lead to a denial of service, disrupting network routing and causing connectivity issues. If exploited, it may result in network outages or degraded performance for affected systems running vulnerable versions of Junos OS or Junos OS Evolved.

Compliance Impact

This vulnerability causes a denial of service via OSPFv2 packets, which could disrupt network availability. For GDPR, availability is a key principle, so prolonged outages may impact compliance. HIPAA requires network integrity and availability for protected health information systems; disruptions could risk compliance.

Mitigation Strategies

Apply the latest Junos OS or Junos OS Evolved security patches from Juniper Networks to address the Integer Overflow or Wraparound vulnerability in the routing protocol daemon (rpd).

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