"No packages marked for update" -> Yet ALAS-2017-901 bulletin exists

Seeing an issue w/ 2017.07 AMI missing this package. Any idea where to locate it??

Advisory: https://alas.aws.amazon.com/ALAS-2017-901.html
kernel-4.9.51-10.52.amzn1.x86_64

[ec2-user@ip-172-31-xxx-xxx ~]$ rpm -qa | grep -i kernel
kernel-tools-4.9.43-17.39.amzn1.x86_64
kernel-4.9.38-16.35.amzn1.x86_64
kernel-4.9.43-17.39.amzn1.x86_64

[ec2-user@ip-172-31-xxx-xxx ~]$ sudo yum update
Loaded plugins: priorities, update-motd, upgrade-helper
amzn-main | 2.1 kB 00:00:00
amzn-updates | 2.3 kB 00:00:00
No packages marked for update