CVE-2026-40215
Fixed in a distro release EPSS <1%CVSS 6.1
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.
Products: OpenVPN
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| Alpine 3.20 | openvpn | 2.6.20-r0 |
| Alpine 3.21 | openvpn | 2.6.20-r0 |
| Alpine 3.22 | openvpn | 2.6.20-r0 |
| Alpine 3.23 | openvpn | 2.6.20-r0 |
| Alpine 3.24 | openvpn | 2.6.20-r0 |
| Debian 12 | openvpn | 2.6.14-0+deb12u1 |
| Debian 13 | openvpn | 2.6.14-1+deb13u2 |
| Debian 14 | openvpn | 2.7.2-1 |
| SUSE Linux Enterprise Module for Basesystem 15 SP7 | openvpn | 2.6.10-150600.3.26.1 |
| SUSE Linux Enterprise Module for Basesystem 15 SP7 | openvpn-dco | 2.6.10-150600.3.26.1 |
| SUSE Linux Enterprise Server 15 SP6-LTSS | openvpn | 2.6.10-150600.3.26.1 |
| SUSE Linux Enterprise Server 15 SP6-LTSS | openvpn-dco | 2.6.10-150600.3.26.1 |
| SUSE Linux Enterprise Server 16.0 | openvpn | 2.6.10-160000.5.1 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP6 | openvpn | 2.6.10-150600.3.26.1 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP6 | openvpn-dco | 2.6.10-150600.3.26.1 |
| SUSE Linux Enterprise Server for SAP applications 16.0 | openvpn | 2.6.10-160000.5.1 |
| Ubuntu 20.04 LTS | openvpn | no fix |
| Ubuntu 22.04 LTS | openvpn | 2.5.11-0ubuntu0.22.04.3 |
| Ubuntu 24.04 LTS | openvpn | 2.6.19-0ubuntu0.24.04.2 |
| Ubuntu 25.10 | openvpn | 2.6.19-0ubuntu0.25.10.2 |
| Ubuntu 26.04 LTS | openvpn | 2.7.0-1ubuntu1.1 |
| Ubuntu Pro 14.04 LTS | openvpn | no fix |
| Ubuntu Pro 16.04 LTS | openvpn | no fix |
| Ubuntu Pro 18.04 LTS | openvpn | no fix |
| openSUSE Leap 16.0 | openvpn | 2.6.10-160000.5.1 |