Do you get any additional errors when you run the "yum update" command on the system? If that isn't working properly, the cPanel updates won't work either.
It ends like this after the yum is over
---> Package yum.noarch 0:3.4.3-168.el7.cloudlinux will be an update
--> Processing Conflict: iproute-4.11.0-30.el7.cloudlinux.x86_64 conflicts kernel < 3.10.0-793.21.1.lve1.5.20
--> Finished Dependency Resolution
Error: iproute conflicts with kernel-3.10.0-327.el7.x86_64
You could try using --skip-broken to work around the problem
** Found 1 pre-existing rpmdb problem(s), 'yum check' output follows:
mod_fcgid-2.3.9-6.el7.x86_64 has missing requires of httpd-mmn = ('0', '20120211x8664', None)
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