just this:
[root@ip-172-31-37-118 tools]# yum check-update
Failed to set locale, defaulting to C
Loaded plugins: priorities, update-motd, upgrade-helper
amzn-main | 2.1 kB 00:00:00
amzn-updates | 3.8 kB 00:00:00
Security: kernel-4.14.193-113.317.amzn1.x86_64 is an installed security update
Security: kernel-4.14.181-108.257.amzn1.x86_64 is the currently running version