| Name | CVE-2025-2704 |
| Description | OpenVPN version 2.6.1 through 2.6.13 in server mode using TLS-crypt-v2 allows remote attackers to trigger a denial of service by corrupting and replaying network packets in the early handshake phase |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| Debian Bugs | 1101935 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| openvpn (PTS) | bullseye | 2.5.1-3 | fixed |
| bullseye (security) | 2.5.1-3+deb11u1 | fixed |
| bookworm, bookworm (security) | 2.6.3-1+deb12u2 | vulnerable |
| sid, trixie | 2.6.14-1 | 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 | (not affected) | | | |
| openvpn | source | (unstable) | 2.6.14-1 | | | 1101935 |
Notes
[bullseye] - openvpn <not-affected> (vulnerable code introduced later)
https://community.openvpn.net/openvpn/wiki/CVE-2025-2704
Introduced after: https://github.com/OpenVPN/openvpn/commit/788ce35cf09aff09b79f428cdd6cfc0ff8627934 (v2.6_beta1)
Fixed by: https://github.com/OpenVPN/openvpn/commit/d3015bfd65348db629dab51e20a9d4e2f3b23493 (v2.6.14)