CVE-2026-11604: CWE-131 Incorrect calculation of buffer size in OpenVPN ovpn-dco-win
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).
AI Analysis
Technical Summary
This vulnerability involves an incorrect calculation of buffer size in the epoch key generator component of OpenVPN ovpn-dco-win version 2.0.0. A remote authenticated peer can exploit this flaw by sending a crafted data packet that triggers a heap-based buffer overflow and kernel memory corruption. The consequence of successful exploitation is a system crash causing denial of service. The CVSS 4.0 base score is 5.6, indicating medium severity. No patch or official remediation has been published at this time.
Potential Impact
Exploitation of this vulnerability results in a denial of service condition due to system crash caused by heap-based buffer overflow and kernel memory corruption. The attacker must be a remote authenticated peer with low privileges and user interaction is required. There is no indication of confidentiality or integrity impact.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict access to trusted peers and monitor for unusual activity. No official fix or temporary workaround has been published by the vendor.
CVE-2026-11604: CWE-131 Incorrect calculation of buffer size in OpenVPN ovpn-dco-win
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).
CVSS v4.0
Score 5.6medium
Affected software
pkg:github/openvpn/ovpn-dco-winRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves an incorrect calculation of buffer size in the epoch key generator component of OpenVPN ovpn-dco-win version 2.0.0. A remote authenticated peer can exploit this flaw by sending a crafted data packet that triggers a heap-based buffer overflow and kernel memory corruption. The consequence of successful exploitation is a system crash causing denial of service. The CVSS 4.0 base score is 5.6, indicating medium severity. No patch or official remediation has been published at this time.
Potential Impact
Exploitation of this vulnerability results in a denial of service condition due to system crash caused by heap-based buffer overflow and kernel memory corruption. The attacker must be a remote authenticated peer with low privileges and user interaction is required. There is no indication of confidentiality or integrity impact.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict access to trusted peers and monitor for unusual activity. No official fix or temporary workaround has been published by the vendor.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- OpenVPN
- Date Reserved
- 2026-06-08T15:19:28.369Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a29dafc3187570649959429
Added to database: 06/10/2026, 21:45:32 UTC
Last enriched: 06/10/2026, 22:00:49 UTC
Last updated: 07/31/2026, 19:22:57 UTC
Views: 88
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