CVE-2026-102054

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Improper Handling of Length Parameter Inconsistency in Juniper Junos OS

Publication date: 2026-10-14

Last updated on: 2026-10-14

Assigner: Juniper Networks, Inc.

Description

An Improper Handling of Length Parameter Inconsistency vulnerability in L2ALM of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated, adjacent attacker to obtain stale PFE packet memory via VXLAN overlay-ping traffic sent to a local VTEP.

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-2026-102054

EUVD

EUVD-2026-101378

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-130	The product parses a formatted message or structure, but it does not handle or incorrectly handles a length field that is inconsistent with the actual length of the associated data.

Attack-Flow Graph

Executive Summary

This vulnerability involves improper handling of length parameters in L2ALM of Juniper Networks Junos OS and Junos OS Evolved. An unauthenticated attacker on the same network can exploit it by sending VXLAN overlay-ping traffic to a local VTEP, potentially accessing stale PFE packet memory.

Impact Analysis

An attacker could exploit this to obtain sensitive packet memory, which may include confidential or proprietary data. This could lead to information disclosure or unauthorized access to network traffic.

Compliance Impact

This vulnerability could potentially impact compliance with GDPR and HIPAA by allowing unauthorized access to packet memory via VXLAN overlay-ping traffic. Unauthorized access to memory may lead to data exposure or integrity issues, which are critical concerns under GDPR's data protection principles and HIPAA's safeguards for protected health information.

Mitigation Strategies

Apply the latest Junos OS or Junos OS Evolved security patches from Juniper Networks to address the L2ALM vulnerability. Monitor VXLAN overlay-ping traffic for unusual patterns and restrict access to local VTEP interfaces.

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