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 (3)
Core 3
Core References
Vendor Advisory vendor-advisory
https://community.openvpn.net/Security%20Announcements/CVE-2026-40215
Release Notes release-notes
https://community.openvpn.net/ReleaseHistory#openvpn-272-released-22-april-2026
Release Notes release-notes
https://community.openvpn.net/ReleaseHistory#openvpn-2620-released-22-april-2026
Scores
CVSS v4
6.1
EPSS
0.0048
EPSS Percentile
37.5%
CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:H/VI:N/VA:H/SC:L/SI:N/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Details
CWE
CWE-125
CWE-416
Status
published
Products (2)
OpenVPN/OpenVPN
2.6.0 - 2.6.19
OpenVPN/OpenVPN
2.7_alpha1 - 2.7.1
Published
Jun 08, 2026
Tracked Since
Jun 09, 2026