This page tracks the Debian fix status. The vulnerability itself is described on the main CVE page. View CVE-2026-11771 →

DEBIAN-CVE-2026-11771

OpenVPN version 2.1.0 through 2.6.20 and 2.7_alpha1 through 2.7.4 allows attackers via an off-by-one buffer write in the NTLM proxy authentication to...

Original description

The description as published by the source.

OpenVPN version 2.1.0 through 2.6.20 and 2.7_alpha1 through 2.7.4 allows attackers via an off-by-one buffer write in the NTLM proxy authentication to potentially cause a crash via a crafted NTLM response from a malicious proxy server

Source: OSV.dev (Open Source Vulnerabilities) OSV

Affected packages

Debian:12 openvpn

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.6.14-0+deb12u2"}]}]

Debian:13 openvpn

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.6.14-1+deb13u3"}]}]

Debian:14 openvpn

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.7.5-1"}]}]

References

advisory security-tracker.debian.org