CVE-2026-102068

Junos OS Evolved: Malformed TCP key-chain traffic causes a kernel panic when BGP or LDP key-chain authentication is used

Published Oct 14, 2026 CVSS 4.0 · 9.2 Critical EPSS < 1% KEV · Not listed
Description
A Stack-based Buffer Overflow vulnerability in the kernel of Juniper Networks Junos OS Evolved allows an unauthenticated remote attacker to trigger a kernel panic via a crafted TCP packet when key-chain authentication is used for BGP or LDP.

Remediation

Vendor Solution

The following software releases have been updated to resolve this specific issue: 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. Note: For Junos OS Evolved releases 23.2-EVO, 23.4-EVO, and 24.2-EVO, specific respins have been referenced. Previously published versions of these releases have been rebuilt to resolve the security vulnerabilities identified in this advisory.


Vendor Workaround

use authentication-key (no chain), or TCP-AO or MD5

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Juniper Networks
Juniper Networks junos Os Evolved
Vendors & Products Juniper Networks
Juniper Networks junos Os Evolved
Type Values Removed Values Added
Metrics ssvc

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

Type Values Removed Values Added
Description A Stack-based Buffer Overflow vulnerability in the kernel of Juniper Networks Junos OS Evolved allows an unauthenticated remote attacker to trigger a kernel panic via a crafted TCP packet when key-chain authentication is used for BGP or LDP.
Title Junos OS Evolved: Malformed TCP key-chain traffic causes a kernel panic when BGP or LDP key-chain authentication is used
Weaknesses CWE-121
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': 9.2, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:H/SI:N/SA:L'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
juniper
Published
Updated
Oct 14, 2026, 8:46 PM
Reserved
Sep 28, 2026, 5:35 PM
Status
Awaiting Analysis
Published
Oct 14, 2026, 5:18 PM
Modified
Oct 15, 2026, 4:24 PM