OpenVPN 2.5.1 and earlier versions allows a remote attackers to bypass authentication and access control channel data on servers configured with deferred authentication, which can be used to potentially trigger further information leaks.
community.openvpn.net/openvpn/wiki/CVE-2020-15078
community.openvpn.net/openvpn/wiki/SecurityAnnouncements
lists.debian.org/debian-lts-announce/2022/05/msg00002.html
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GJUXEYHUPREEBPX23VPEKMFXUPVO3PMU/
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JGEGLC4YGBDN5CGHTNWN2GH6DJJA36T2/
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PLDB3OBQ3AODYYRN7NRCABV6I4AUFAT6/
security.gentoo.org/glsa/202105-25
usn.ubuntu.com/usn/usn-4933-1