glibc exploit - update your servers
I'm using CentOS 7 on all my servers and RHEL/CentOS rpm packages have been released as of today. Unfortunately, linode mirrors aren't up-to-date, but you can by-pas the mirrors and hit the main CentOS repository.
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If a mirror is a bit late to update, you can always modify your /etc/yum.repos.d/ files to bypass mirrors and to hit centos.org directly.
Thanks rmcintosh for letting us know, hopefully everyone will be running some kind of yum-cron to load updates automatically.
PS:
glibc can stay memory resident even after an update if its being used by something and since this is a major (and I MEAN MAJOR) library in Linux, your best bet is to reboot.