OpenVPN Race Condition Vulnerability in TLS Session Promotion Allowing Server Crash or Memory Leak

Vulnerability

A race condition vulnerability has been identified in OpenVPN versions 2.6.0 through 2.6.19 and 2.7_alpha1 through 2.7.1. This vulnerability allows remote attackers to potentially cause a server crash or leak heap memory by exploiting a use-after-free condition during the promotion of TLS sessions.

Impact

Exploitation of this vulnerability can lead to a server crash or unauthorized memory access, potentially allowing for further exploitation.

Added: Jun 8, 2026, 9:22 PM
Updated: Jun 8, 2026, 9:22 PM

Vulnerability Rating

Custom Algorithm
spread
7.6
impact
5.0
exploitability
6.4
remediation
0.0
relevance
9.4
threat
0.0
urgency
2.9
incentive
0.0

Our algorithm analyzes dozens of metrics to generate these 8 key vulnerability categories, which are then combined to calculate the overall risk score.