OpenVPN ovpn-dco-win UAF (2.5.0-2.8.6) Crash via Control Msg
CVE-2026-82325 Published on September 7, 2026
A use-after-free vulnerability in the OpenVPN ovpn-dco-win driver version 2.5.0 through 2.8.6 allows local authenticated users to cause a system crash via crafted control messages
Vulnerability Analysis
CVE-2026-82325 can be exploited with local system access, and requires small amount of user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity and availability.
Weakness Types
What is a Dangling pointer Vulnerability?
Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code.
CVE-2026-82325 has been classified to as a Dangling pointer vulnerability or weakness.
What is a Double-free Vulnerability?
The product calls free() twice on the same memory address, potentially leading to modification of unexpected memory locations. When a program calls free() twice with the same argument, the program's memory management data structures become corrupted. This corruption can cause the program to crash or, in some circumstances, cause two later calls to malloc() to return the same pointer. If malloc() returns the same value twice and the program later gives the attacker control over the data that is written into this doubly-allocated memory, the program becomes vulnerable to a buffer overflow attack.
CVE-2026-82325 has been classified to as a Double-free vulnerability or weakness.
Affected Versions
OpenVPN ovpn-dco-win:- Version 2.5.0, <= 2.8.6 is affected.