CentOS Errata and Bugfix Advisory 2015:1503 

Upstream details at : https://rhn.redhat.com/errata/RHBA-2015-1503.html

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

x86_64:
f2df06df74bff8b4fd5c7e38c60fb981867273a46295c727982cb429c603f912  docbook-style-dsssl-1.79-18.el7.noarch.rpm

Source:
8228a2ad4538fee2aa6870146ad9597400cab2c55af4acf649c5f3c6e07ca074  docbook-style-dsssl-1.79-18.el7.src.rpm