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Fencer Vulns
high 7.5

CVE-2025-2704 json

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…

published 2025-04-02 19 mo ago modified 2026-06-17 4 mo ago also EUVD-2025-9571

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.8%
EPSS 0.8% chance of exploitation in 30 days, percentile 58%
public exploits
0
none known

Summary

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

Patch / fix

  • openvpn openvpn 2.6.14
  • openvpn Debian 12 2.6.3-1+deb12u3
  • openvpn Debian 14, Debian 13 2.6.14-1

debian advisories DEBIAN-CVE-2025-2704

  • openvpn Ubuntu 24.04 LTS 2.6.12-0ubuntu0.24.04.3

ubuntu advisories UBUNTU-CVE-2025-2704

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • openvpn SLE Module for Basesystem 15 SP7, SLE Module for Basesystem 15 SP6, openSUSE Leap 15.6 2.6.8-150600.3.17.1
  • openvpn-dco SLE Module for Basesystem 15 SP7, SLE Module for Basesystem 15 SP6, openSUSE Leap 15.6 2.6.8-150600.3.17.1

suse advisories SUSE-SU-2025:01508-1SUSE-SU-2025:1508-1

  • openvpn openSUSE Tumbleweed 2.6.14-1.1

opensuse advisories openSUSE-SU-2025:14979-1

  • openvpn Alpine 3.20, Alpine 3.19 2.6.16-r0
  • openvpn Alpine 3.24, Alpine 3.23, Alpine 3.22 +1 more 2.6.14-r0

alpine advisories ALPINE-CVE-2025-2704

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2025-2704 updated cvss 5.9

openvpn: OpenVPN in a server role with tls-crypt-v2 enabled can reach an assertion failed state when receiving specially crafted packets

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
19 mo ago

Exploit prediction

0.84% chance of exploitation in the next 30 days, higher than 58% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

  • OpenVPN OpenVPN

Classification

Weakness
  • CWE-754 Improper Check for Unusual or Exceptional Conditions

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.