CVE-2025-2704

NameCVE-2025-2704
DescriptionOpenVPN 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
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs1101935

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
openvpn (PTS)bullseye2.5.1-3vulnerable
bullseye (security)2.5.1-3+deb11u1vulnerable
bookworm, bookworm (security)2.6.3-1+deb12u2vulnerable
trixie2.6.13-1vulnerable
sid2.6.14-1fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
openvpnsource(unstable)2.6.14-11101935

Notes

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)

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