CVE-2025-12106
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-12-01

Last updated on: 2025-12-01

Assigner: OpenVPN Inc.

Description
Insufficient argument validation in OpenVPN 2.7_alpha1 through 2.7_rc1 allows an attacker to trigger a heap buffer over-read when parsing IP addresses
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Meta Information
Published
2025-12-01
Last Modified
2025-12-01
Generated
2026-06-16
AI Q&A
2025-12-01
EPSS Evaluated
2026-06-15
NVD
CVE-2025-12106
EUVD
EUVD-2025-199988
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
openvpn openvpn 2.7
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Exploitability
CWE
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KEV
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CWE ID Description
CWE-126 The product reads from a buffer using buffer access mechanisms such as indexes or pointers that reference memory locations after the targeted buffer.
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Executive Summary

This vulnerability is a heap buffer over-read in OpenVPN versions 2.7_alpha1 through 2.7_rc1. It occurs due to insufficient argument validation when parsing IP addresses, specifically IPv6 addresses, allowing an attacker to trigger the over-read by providing invalid input. [1]

Impact Analysis

The vulnerability can lead to a heap buffer over-read, which may cause the OpenVPN process to crash or behave unpredictably. This could potentially be exploited by an attacker to cause denial of service or to leak sensitive memory contents, impacting the security and stability of the VPN service. [1]

Mitigation Strategies

Upgrade OpenVPN to version 2.7_rc2 or later, as this release includes a fix for CVE-2025-12106 that addresses the heap buffer over-read vulnerability in IP address parsing. Additionally, review and apply any related security updates provided in this release to ensure comprehensive protection. [1]

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