vsftpd saying 500 OOPS: priv_sock_get_cmd (after update?..) (Page 1) / Networking, Server, and Protection / Arch Linux Forums
There is an obscure, non selinux, problem with Fedora vsftpd when running on a VM.
Below is a one line fix that will save you lots of debug time :)
The log file will report various selinux failures, but that is NOT the problem. The ftp sessions will get a few error messages, and be dropped from the server.
It occurs when running Fedora in a VM.
yum -y install vsftpd
# Workaround for 500 OOPS: priv_sock_get_cmd