CentOS Errata and Enhancement Advisory 2015:1227 

Upstream details at : https://rhn.redhat.com/errata/RHEA-2015-1227.html

The following updated files have been uploaded and are currently 
syncing to the mirrors: ( sha256sum Filename ) 

i386:
08399eb21fc5ec516a4eb85d9c69654fcde5435d465991eea6fd2271cd1dd3c5  kmod-mmc_core_dup-0.1_rh1-1.el6_6.i686.rpm

x86_64:
5decccdd991618d635ac6647299f235227e90cb742f594531830e979683a7ed8  kmod-mmc_core_dup-0.1_rh1-1.el6_6.x86_64.rpm

Source:
eef4f6a6370f10f7fde85ec9e4fe1e3558460babd3f3387bafceea71aa5b6a1a  mmc_core_dup-0.1_rh1-1.el6_6.src.rpm