You might have seen widely reported Linux vulnerability in the media named CVE-2015-7547 reported by Google and RedHat.
The SME Appliance is not affected by this vulnerability. The SME Appliance currently uses CentOS 5.x as the base operating system and it is not affected.
Steps we have taken to test the Vulnerability
We have checked SME is not vulnerable by executing the Proof of Concept exploit and confirmed the appliance is not vulnerable.
RedHat has also confirmed that CentOS/RedHat 5.x are not affected by this vulnerability.
“This issue does not affect the versions of glibc as shipped with Red Hat Enterprise Linux 4 and 5.” See https://access.redhat.com/security/cve/cve-2015-7547