CVE-2026-40215

Name
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.
NVD Severity
unknown
Other trackers
CVE, NVD, CERT, CVE Details, CIRCL, Arch Linux, Debian, Red Hat, Ubuntu, Gentoo, SUSE (Bugzilla), SUSE (CVE), Mageia
Mailing lists
oss-security, full-disclosure, bugtraq
Exploits
Exploit DB, Metasploit
Forges
GitHub (code, issues), Aports (code, issues)

References

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

Match rules

CPE URI Source package Min version Max version
cpe:2.3:a:openvpn:openvpn:*:*:*:*:*:*:*:* openvpn >= 2.6.0 < 2.6.20
cpe:2.3:a:openvpn:openvpn:*:*:*:*:*:*:*:* openvpn >= 2.7 < 2.7.2

Vulnerable and fixed packages

Source package Branch Version Maintainer Status
openvpn edge-main 2.6.20-r0 Natanael Copa <ncopa@alpinelinux.org> fixed
openvpn edge-main 2.6.17-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
openvpn edge-main 2.6.16-r1 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
openvpn edge-main 2.6.16-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
openvpn edge-main 2.6.14-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
openvpn edge-main 2.6.13-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
openvpn edge-main 2.6.12-r1 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
openvpn edge-main 2.6.12-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
openvpn edge-main 2.6.11-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
openvpn edge-main 2.6.10-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
openvpn edge-main 2.6.9-r1 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
openvpn edge-main 2.6.9-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
openvpn edge-main 2.6.8-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
openvpn edge-main 2.6.7-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
openvpn edge-main 2.6.6-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
openvpn edge-main 2.6.5-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
openvpn edge-main 2.6.4-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
openvpn edge-main 2.6.3-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
openvpn edge-main 2.6.2-r1 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
openvpn edge-main 2.6.2-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
openvpn edge-main 2.6.1-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
openvpn edge-main 2.6.0-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
openvpn 3.23-main 2.6.20-r0 Natanael Copa <ncopa@alpinelinux.org> fixed
openvpn 3.23-main 2.6.16-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
openvpn 3.22-main 2.6.20-r0 Natanael Copa <ncopa@alpinelinux.org> fixed
openvpn 3.22-main 2.6.16-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
openvpn 3.22-main 2.6.14-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
openvpn 3.22-main 2.6.11-r0 None possibly vulnerable
openvpn 3.22-main 2.6.7-r0 None possibly vulnerable
openvpn 3.21-main 2.6.20-r0 Natanael Copa <ncopa@alpinelinux.org> fixed
openvpn 3.21-main 2.6.16-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
openvpn 3.21-main 2.6.14-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
openvpn 3.21-main 2.6.12-r1 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
openvpn 3.21-main 2.6.11-r0 None possibly vulnerable
openvpn 3.21-main 2.6.7-r0 None possibly vulnerable
openvpn 3.20-main 2.6.20-r0 Natanael Copa <ncopa@alpinelinux.org> fixed
openvpn 3.20-main 2.6.16-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
openvpn 3.20-main 2.6.11-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
openvpn 3.20-main 2.6.10-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
openvpn 3.20-main 2.6.7-r0 None possibly vulnerable
openvpn 3.19-main 2.6.16-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
openvpn 3.19-main 2.6.11-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
openvpn 3.19-main 2.6.8-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
openvpn 3.19-main 2.6.7-r0 None possibly vulnerable