Vulnerability 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.
CVSS Score
7.4
HIGH
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:H
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Openvpn | Openvpn | >= 2.6.0, < 2.6.20 |
Related Weaknesses (CWE)
References
- https://community.openvpn.net/ReleaseHistory#openvpn-2620-released-22-april-2026Release Notes
- https://community.openvpn.net/ReleaseHistory#openvpn-272-released-22-april-2026Release Notes
- https://community.openvpn.net/Security%20Announcements/CVE-2026-40215Vendor Advisory
FAQ
What is CVE-2026-40215?
CVE-2026-40215 is a vulnerability with a CVSS score of 7.4 (HIGH). 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 ...
How severe is CVE-2026-40215?
CVE-2026-40215 has been rated HIGH with a CVSS base score of 7.4/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-40215?
Check the references section above for vendor advisories and patch information. Affected products include: Openvpn Openvpn.