Session save path suddenly not working. Joomla won't install

I've set up literally dozens of sites on my VPS server using Joomla and Akeeba Backup. Never had any problems...

Today I went in to restore a site for a client using the same method and I am getting the following error messages:

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Warning: session_start() [function.session-start]: open(/tmp/sess_e137d61534287741b67d435e2df246e9, O_RDWR) failed: Permission denied (13) in /home/......../installation/includes/storage.php on line 221

Warning: Unknown: open(/tmp/sess_e137d61534287741b67d435e2df246e9, O_RDWR) failed: Permission denied (13) in Unknown on line 0

Warning: Unknown: Failed to write session data (files). Please verify that the current setting of session.save_path is correct (/tmp) in Unknown on line 0

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No changes have been made by me to the server aside from a "yum update" about a week ago and that potentially may have changed something but I don't know what.

When running a php-info check it returns that my session save path is /tmp That directory is set to 0755 for permissions.

Any idea what may have become misconfigured on this? Any idea how I might be able to fix it?

 

I am the server admin and I have root access. It's a private VPS system running CentOS and cPanel. I just need to know what to do to fix the problem... Anyone know? The home/username/tmp directories are all set to 755.

By the way, here is my server info:
Server Version: Apache/2.2.26 (Unix) mod_ssl/2.2.26 OpenSSL/1.0.1e-fips mod_bwlimited/1.4
Easy::Apache v3.24.17
CentOS 6.5
PHP 5 suphp suEXEC on