CentOS Errata and Enhancement Advisory 2015:1600 

Upstream details at : https://rhn.redhat.com/errata/RHEA-2015-1600.html

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

i386:
6901cdee5ee315b81904f3883eff2aad14b0da4533097c566816e97ae64e8773  kmod-cfg80211_dup-0.1_rh1-1.el6_6.i686.rpm

x86_64:
067549365623676b6b63b781a43203fa24ff9e50f134f1ffce7bdeeb8ec048f7  kmod-cfg80211_dup-0.1_rh1-1.el6_6.x86_64.rpm

Source:
6043001ba4f5d6b8ebf4629495b7b2a5aff150800c8642190f52c1715d1d1e06  cfg80211_dup-0.1_rh1-1.el6_6.src.rpm