---
id: CVE-2026-102027
title: >-
  An Incorrect Calculation of Buffer Size vulnerability in the routing protocol
  daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows a
  configured eBGP neighbor to cause an rpd crash via BGP labeled-unicast UPDATEs
  when the…
summary: >-
  An Incorrect Calculation of Buffer Size vulnerability in the routing protocol
  daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows a
  configured eBGP neighbor to cause an rpd crash via BGP labeled-unicast UPDATEs
  when the…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-131
published: '2026-10-14'
updated: '2026-10-14'
sourceUpdated: '2026-10-14T17:17:55.973'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-102027'
references:
  - url: 'https://supportportal.juniper.net/JSA112187'
    label: sirt@juniper.net
tags:
  - nvd
ingestedAt: '2026-10-14T17:44:53.651Z'
---

## Overview

An Incorrect Calculation of Buffer Size vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows a configured eBGP neighbor to cause an rpd crash via BGP labeled-unicast UPDATEs when the affected multipath features are enabled.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.