Addressing the issue with DST Root CA X3 Expiration, you might face a situation where CLoudLinux OS repositories are not accessible.
It can affect CloudLinux OS 6 ELS, CloudLinux OS 7, and KernelCare customers using CentOS 7.
To solve the issue, get the following updates.
yum update openssl* --enablerepo=cloudlinux-rollout-3-bypass
For CentOS 6 ELS:
yum update openssl* --enablerepo=ELS6-rollout-4-bypass
yum clean all
yum update ca-certificates