unknown root username

hello - when i look in the mysql.user table, i see the following entry for root:

MariaDB [(none)]> select user, host from mysql.user where user = 'root' ;
| user | host      |
| root | |
| root | ::1       |
| root | localhost |
| root | centos7.is.cc |
4 rows in set (0.00 sec)

i do not recognize the "root centos7.is.cc" one, so i changed the username.

when i did a new install on another centos7 box, this user entry was not there.

could some rogue process have left some sort of secret back-door in my system?

thank you all very much for your patience.

Answer Answered by Anel Husakovic in this comment.

Hi can you give any details on your setup, mariadb version, configuration etc.


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