The CVE-2015-4644 correction is not in rhel6
The problem and patch are described at
Bug 1234940 comment 2 explains why this is not planned to get backport as part of the usual security handling process.
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory, and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.