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ovpn-dco-win CVE-2026-82325

| EUVDEUVD-2026-72348 MEDIUM
Double Free (CWE-415)
2026-09-07 security@openvpn.net GHSA-pc42-rjrj-cj9w
Denial Of Service Suse
6.8
CVSS 4.0 · Vendor: openvpn
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Severity by source

Vendor (openvpn) PRIMARY
6.8 MEDIUM
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
vuln.today AI
6.5 MEDIUM

Kernel-mode driver crash causes whole-system BSOD (scope change); low privileges sufficient; no confidentiality or integrity impact.

3.1 AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
4.0 AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
SUSE
6.2 MEDIUM
AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Primary rating from Vendor (openvpn).

CVSS VectorVendor: openvpn

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
X

Lifecycle Timeline

1
Analysis Generated
Sep 07, 2026 - 11:33 vuln.today

DescriptionCVE.org

A use-after-free vulnerability in the OpenVPN ovpn-dco-win driver version 2.5.0 through 2.8.6 allows local authenticated users to cause a system crash via crafted control messages

AnalysisAI

Use-after-free (CWE-415/416) in the OpenVPN ovpn-dco-win Windows kernel Data Channel Offload driver versions 2.5.0 through 2.8.6 enables a local authenticated user to trigger a system crash by sending crafted control messages to the driver. Because the flaw resides in a kernel-mode driver, successful exploitation causes a full system crash (BSOD), affecting availability of the entire host. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

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Vulnerability AssessmentAI

Exploitation Exploitation requires: (1) the attacker holds a valid, authenticated local OS session on the target Windows machine - remote unauthenticated exploitation is not possible; (2) the ovpn-dco-win driver is installed and loaded, which only occurs when OpenVPN is configured with the DCO feature enabled (non-default in legacy deployments but default in newer OpenVPN 2.6+ Windows installations); (3) the target Windows version must support the DCO driver stack. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 4.0 vector (AV:L/AC:L/AT:N/PR:L/UI:N/VA:H) accurately captures the threat: a low-privileged local user can reliably crash the system with no interaction from another user. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation Upgrade the ovpn-dco-win driver to a version beyond 2.8.6 per the vendor advisory at https://community.openvpn.net/Security%20Announcements/CVE-2026-82325. … Detailed patch versions, workarounds, and compensating controls in full report.
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Same weakness CWE-415 – Double Free

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Same technique Denial Of Service

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Vendor StatusVendor

SUSE

Severity: Moderate
Product Status
SUSE Linux Enterprise Desktop 15 SP7 Not-Affected
SUSE Linux Enterprise High Performance Computing 12 Not-Affected
SUSE Linux Enterprise Module for Basesystem 15 SP7 Not-Affected
SUSE Linux Enterprise Server 15 SP7 Not-Affected
SUSE Linux Enterprise Server 16.0 Not-Affected

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CVE-2026-82325 vulnerability details – vuln.today
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