| 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. |
| Source | CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DLA-4653-1, DSA-6289-1 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| openvpn (PTS) | bookworm, bookworm (security) | 2.6.14-0+deb12u2 | fixed |
| trixie (security), trixie | 2.6.14-1+deb13u3 | fixed | |
| forky, sid | 2.7.7-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| openvpn | source | bullseye | 2.5.1-3+deb11u3 | DLA-4653-1 | ||
| openvpn | source | bookworm | 2.6.14-0+deb12u1 | DSA-6289-1 | ||
| openvpn | source | trixie | 2.6.14-1+deb13u2 | DSA-6289-1 | ||
| openvpn | source | (unstable) | 2.7.2-1 |
https://community.openvpn.net/Security%20Announcements/CVE-2026-40215
Fixed by: https://github.com/OpenVPN/openvpn/commit/4a2c827c2536aa03a1d6c7cc916689a46c067187 (v2.7.2)