Vulnerability 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 Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Openvpn | Openvpn | >= 2.0.0, <= 2.8.3 |
Related Weaknesses (CWE)
References
- https://community.openvpn.net/Security%20Announcements/CVE-2026-11604Vendor Advisory
- https://github.com/OpenVPN/ovpn-dco-win/releasesRelease Notes
FAQ
What is CVE-2026-11604?
CVE-2026-11604 is a vulnerability with a CVSS score of 6.5 (MEDIUM). 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 kerne...
How severe is CVE-2026-11604?
CVE-2026-11604 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-11604?
Check the references section above for vendor advisories and patch information. Affected products include: Openvpn Openvpn.