CVE-2026-40215

Description

A race condition in OpenVPN 2.6.0 through 2.6.19 and 2.7_alpha1 through 2.7.1 allows remote attackers to potentially cause a server crash or leak heap memory via a use-after-free triggered during TLS session promotion.

References

• https://community.openvpn.net/ReleaseHistory#openvpn-2620-released-22-april-2026
• https://community.openvpn.net/ReleaseHistory#openvpn-272-released-22-april-2026
• https://community.openvpn.net/Security%20Announcements/CVE-2026-40215