Description
OpenVPN 2.x before 2.0.11, 2.1.x, 2.2.x before 2.2.3, and 2.3.x before 2.3.6 allows remote authenticated users to cause a denial of service (server crash) via a small control channel packet.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | openvpn | 2.3.4-5 | — |
| Debian 13 | openvpn | 2.3.4-5 | — |
| Debian 12 | openvpn | 2.3.4-5 | — |
| Debian 7 | openvpn | 2.2.1-8+deb7u3 | DSA-3084-1 |
| Debian 6.0 | openvpn | 2.1.3-2+squeeze3 | DLA-98-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 14.04 LTS | openvpn | 2.3.2-7ubuntu3.1 | USN-2430-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | openvpn | 2.3.11-3.1 | openSUSE-SU-2024:10211-1 |
Advisories 4
- DLA-98-1 openvpn - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-3084-1 openvpn - security update Debian Security (DSA / DLA) · Mar 9, 2026
- USN-2430-1 openvpn vulnerability Ubuntu Security Notices (USN) · Feb 10, 2026
- openSUSE-SU-2024:10211-1 openvpn-2.3.11-3.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
References
- MDVSA-2015:139 vendor-advisory
- http://advisories.mageia.org/MGASA-2014-0512.html
- USN-2430-1 vendor-advisory
- DSA-3084 vendor-advisory
- https://community.openvpn.net/openvpn/wiki/SecurityAnnouncement-97597e732b
- openSUSE-SU-2014:1594 vendor-advisory