I just came across this.
*NIX vulnerability lets attackers hijack VPN connections.
CVE-2019-14899
https://www.bleepingcomputer.com/news/security/new-linux-vulnerability-lets-attackers-hijack-vpn-connections/
More information on the topic: https://seclists.org/oss-sec/2019/q4/122
The NVD-entry is reserved at the moment of writing: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-14899