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Ubuntu CVE-2025-12106

| EUVDEUVD-2025-199988 CRITICAL
Buffer Over-read (CWE-126)
2025-12-01 security@openvpn.net
Critical
Disputed · 9.1 NVD
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Severity by source

Sources disagree (Medium–Critical)
NVD PRIMARY
9.1 CRITICAL
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Ubuntu
MEDIUM
qualitative
SUSE
CRITICAL
qualitative

vuln.today treats the vendor’s rating as authoritative. A higher third-party CVSS (e.g. CISA-ADP) is shown for transparency but does not drive the headline severity.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
High

Lifecycle Timeline

4
Patch released
Mar 31, 2026 - 21:13 nvd
Patch available
EUVD ID Assigned
Mar 15, 2026 - 13:34 euvd
EUVD-2025-199988
Analysis Generated
Mar 15, 2026 - 13:34 vuln.today
CVE Published
Dec 01, 2025 - 13:16 nvd
CRITICAL 9.1

DescriptionCVE.org

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

Analysis

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

Technical ContextAI

This vulnerability is classified as Buffer Over-read (CWE-126).

RemediationAI

Monitor vendor advisories for patches. Apply mitigations such as network segmentation, access restrictions, and monitoring.

CVE-2018-7544 CRITICAL POC
9.1 Mar 16

A cross-protocol scripting issue was discovered in the management interface in OpenVPN through 2.4.5. Rated critical sev

CVE-2017-7478 HIGH POC
7.5 May 15

OpenVPN version 2.3.12 and newer is vulnerable to unauthenticated Denial of Service of server via received large control

CVE-2018-9336 HIGH POC
7.8 May 01

openvpnserv.exe (aka the interactive service helper) in OpenVPN 2.4.x before 2.4.6 allows a local attacker to cause a do

CVE-2023-46850 CRITICAL
9.8 Nov 11

Use after free in OpenVPN version 2.6.0 to 2.6.6 may lead to undefined behavoir, leaking memory buffers or remote execut

CVE-2019-25429 MEDIUM POC
6.1 Feb 19

Comodo Dome Firewall 2.7.0 contains a reflected cross-site scripting vulnerability that allows attackers to inject malic

CVE-2019-25428 MEDIUM POC
6.1 Feb 19

Comodo Dome Firewall 2.7.0 contains multiple reflected cross-site scripting vulnerabilities in the openvpn_users endpoin

CVE-2017-12166 CRITICAL
9.8 Oct 04

OpenVPN versions before 2.3.3 and 2.4.x before 2.4.4 are vulnerable to a buffer overflow vulnerability when key-method 1

CVE-2024-27903 CRITICAL
9.8 Jul 08

OpenVPN plug-ins on Windows with OpenVPN 2.6.9 and earlier could be loaded from any directory, which allows an attacker

CVE-2022-0547 CRITICAL
9.8 Mar 18

OpenVPN 2.1 until v2.4.12 and v2.5.6 may enable authentication bypass in external authentication plug-ins when more than

CVE-2020-7224 CRITICAL
9.8 Apr 16

The Aviatrix OpenVPN client through 2.5.7 on Linux, macOS, and Windows is vulnerable when OpenSSL parameters are altered

CVE-2024-4877 HIGH
8.8 Apr 03

OpenVPN version 2.4.0 through 2.6.10 on Windows allows an external, lesser privileged process to create a named pipe whi

CVE-2024-27459 HIGH
7.8 Jul 08

The interactive service in OpenVPN 2.6.9 and earlier allows an attacker to send data causing a stack overflow which can

Vendor StatusVendor

Ubuntu

Priority: Medium
openvpn
Release Status Version
trusty not-affected code not present
xenial not-affected code not present
bionic not-affected code not present
focal not-affected code not present
jammy not-affected code not present
noble not-affected code not present
plucky not-affected code not present
questing not-affected code not present
upstream not-affected debian: Vulnerable code only in 2.7 upstream

Debian

openvpn
Release Status Fixed Version Urgency
bullseye fixed 2.5.1-3 -
bullseye (security) fixed 2.5.1-3+deb11u2 -
bookworm, bookworm (security) fixed 2.6.3-1+deb12u4 -
trixie (security), trixie fixed 2.6.14-1+deb13u1 -
forky, sid fixed 2.7.0-1 -
(unstable) not-affected - -

SUSE

Severity: Critical
Product Status
SUSE Linux Enterprise Desktop 15 SP7 Fixed
SUSE Linux Enterprise High Performance Computing 15 SP7 Fixed
SUSE Linux Enterprise Module for Basesystem 15 SP7 Fixed
SUSE Linux Enterprise Server 15 SP7 Fixed
SUSE Linux Enterprise Server for SAP Applications 15 SP7 Fixed

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CVE-2025-12106 vulnerability details – vuln.today

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