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).
History

Tue, 11 Aug 2026 16:00:00 +0000

Type Values Removed Values Added
First Time appeared Openvpn openvpn
CPEs cpe:2.3:a:openvpn:openvpn:*:*:*:*:*:*:*:*
Vendors & Products Openvpn openvpn
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}


Thu, 11 Jun 2026 14:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Wed, 10 Jun 2026 22:45:00 +0000

Type Values Removed Values Added
Title Heap Buffer Overflow in OpenVPN ovpn-dco-win Leading to System Crash
First Time appeared Openvpn
Openvpn ovpn-dco-win
Vendors & Products Openvpn
Openvpn ovpn-dco-win

Wed, 10 Jun 2026 21:45:00 +0000

Type Values Removed Values Added
Description 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).
Weaknesses CWE-122
CWE-131
CWE-787
References
Metrics cvssV4_0

{'score': 5.6, 'vector': 'CVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H'}


cve-icon MITRE

Status: PUBLISHED

Assigner: OpenVPN

Published:

Updated: 2026-06-11T13:27:17.336Z

Reserved: 2026-06-08T15:19:28.369Z

Link: CVE-2026-11604

cve-icon Vulnrichment

Updated: 2026-06-11T13:27:03.764Z

cve-icon NVD

Status : Analyzed

Published: 2026-06-10T22:16:55.643

Modified: 2026-08-11T13:01:04.963

Link: CVE-2026-11604

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-06-10T22:30:22Z