Since 2 days ago, I've started to receive this email to the root account every 4 hours.
Cron <root@server> /usr/bin/kcarectl --auto-update
Cron <root@server> /usr/bin/kcarectl --auto-update
Current kernel version is 2.6.32-754.18.2.el6.x86_64 x86_64 on CentOS 6Updates already downloaded
No updates are needed for this kernel