An Out-of-bounds Write vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows an eBGP peer which has not negotiated four-octet-AS capability sending a specifically malformed BGP update to cause a Denial-of-Service (DoS).
History

Fri, 23 Oct 2026 15:15:00 +0000

Type Values Removed Values Added
First Time appeared Juniper Networks
Juniper Networks junos Os
Juniper Networks junos Os Evolved
Vendors & Products Juniper Networks
Juniper Networks junos Os
Juniper Networks junos Os Evolved

Wed, 14 Oct 2026 20:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Wed, 14 Oct 2026 17:30:00 +0000

Type Values Removed Values Added
Description An Out-of-bounds Write vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows an eBGP peer which has not negotiated four-octet-AS capability sending a specifically malformed BGP update to cause a Denial-of-Service (DoS).
Title Junos OS and Junos OS Evolved: In a non-4byte-AS scenario a specific BGP update causes an rpd crash
Weaknesses CWE-787
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

cvssV4_0

{'score': 8.7, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L'}


cve-icon MITRE

Status: PUBLISHED

Assigner: juniper

Published: 2026-10-14T17:16:04.312Z

Updated: 2026-10-14T19:05:05.956Z

Reserved: 2026-09-28T16:31:35.503Z

Link: CVE-2026-101976

cve-icon Vulnrichment

Updated: 2026-10-14T19:04:09.078Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-10-14T18:17:12.640

Modified: 2026-10-15T16:23:06.250

Link: CVE-2026-101976

cve-icon Redhat

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