CVE-2026-11604 Memory corruption in ovpn-dco-win
A remote authenticated peer can trigger a heap-based buffer overflow in the OpenVPN Windows driver, causing kernel memory corruption and a system crash.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-11604?
CVE-2026-11604 is a medium-severity memory corruption vulnerability in OpenVPN ovpn-dco-win, published on 10 Jun 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official 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).
Which versions are affected by CVE-2026-11604?
It affects 1 product.
Products include Openvpn Ovpn-Dco-Win.
How do I fix CVE-2026-11604?
No fix has been published for CVE-2026-11604 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-11604 being exploited?
There is no known exploitation of CVE-2026-11604 in the wild and no public exploit code.
Other vulnerabilities in OpenVPN ovpn-dco-win
Sources
Also known as GHSA-f6c5-28vq-94w2.