CVE-2026-11604

An incorrect buffer size calculation in the epoch key generator in OpenVPN ovpn-dco-win version 2.0.0 through 2.8.3 allows a remote authenticated peer to trigger a heap-based buffer overflow and kernel memory corruption via a crafted data packet, resulting in a system crash (denial of service).

CVSS v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://community.openvpn.net/Security%20Announcements/CVE-2026-11604	Vendor Advisory
https://github.com/OpenVPN/ovpn-dco-win/releases	Release Notes

Configurations

Configuration 1 (hide)

cpe:2.3:a:openvpn:openvpn:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-06-10 22:16

Updated : 2026-08-11 13:01

NVD link : CVE-2026-11604

Mitre link : CVE-2026-11604

CVE.ORG link : CVE-2026-11604

JSON object : View

Products Affected

openvpn

openvpn

CWE

CWE-122

Heap-based Buffer Overflow

CWE-131

Incorrect Calculation of Buffer Size

CWE-787

Out-of-bounds Write

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