CentOS Errata and Bugfix Advisory 2015:C003 

Upstream details at : http://bugs.centos.org/view.php?id=6809

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

i386:
2b179666c4cc9e2e551dd501cb1eb5782587b07fbc3ab2e25b0c992f935e94b4  xorg-x11-server-common-1.15.0-26.el6.centos.0.1.i686.rpm
cfd4bdd646b43bd1e408ec185683ad1ad5f41ae733e949162cbecd7d75f46932  xorg-x11-server-devel-1.15.0-26.el6.centos.0.1.i686.rpm
1e5b73bd45927926e4ccdf10c7638c1187f19b6654c3aeedea4602b60b677837  xorg-x11-server-source-1.15.0-26.el6.centos.0.1.noarch.rpm
b9aada45c6d65b669f06a93de77bba894acfd6070cccb140b6f28ab4abcea85d  xorg-x11-server-Xdmx-1.15.0-26.el6.centos.0.1.i686.rpm
2694b10619ced7fdc8e575084906f7eeb9b7a4198422db44095841d2c0d792c3  xorg-x11-server-Xephyr-1.15.0-26.el6.centos.0.1.i686.rpm
336e333a6be40da9f101773d25fc7b19ffc4ce9784edd765824a8a03aaa985f8  xorg-x11-server-Xnest-1.15.0-26.el6.centos.0.1.i686.rpm
917b3fe03a281ce3e29a05e478bee90422f2d7ba770e49f2857692c1b22a6a8e  xorg-x11-server-Xorg-1.15.0-26.el6.centos.0.1.i686.rpm
6db15af10bfb8196b4bc35a07989086834286751f7c3b1ff6a6c1dbd6afde843  xorg-x11-server-Xvfb-1.15.0-26.el6.centos.0.1.i686.rpm

x86_64:
2ca61ed81ecea1eb6645b0bf2529b8de43e12de07afbf470f3e674712e046c06  xorg-x11-server-common-1.15.0-26.el6.centos.0.1.x86_64.rpm
cfd4bdd646b43bd1e408ec185683ad1ad5f41ae733e949162cbecd7d75f46932  xorg-x11-server-devel-1.15.0-26.el6.centos.0.1.i686.rpm
c868e0fcf8740a3cde3de10cca3a2990afdbb9ffe672c651691f417f3346cc4b  xorg-x11-server-devel-1.15.0-26.el6.centos.0.1.x86_64.rpm
1e5b73bd45927926e4ccdf10c7638c1187f19b6654c3aeedea4602b60b677837  xorg-x11-server-source-1.15.0-26.el6.centos.0.1.noarch.rpm
485b71485e2a02823f6acf56ec95400da5bf99d49ef4e550c749ba919b3fa50d  xorg-x11-server-Xdmx-1.15.0-26.el6.centos.0.1.x86_64.rpm
13b01f94c94cf781b45713a4ab519b1d19a5e8fe78795795c434c4cf9b57840c  xorg-x11-server-Xephyr-1.15.0-26.el6.centos.0.1.x86_64.rpm
abff1971ae3afb6ad72f9b6bf8a71fcd617456e0d10c5d572b72266af3714a85  xorg-x11-server-Xnest-1.15.0-26.el6.centos.0.1.x86_64.rpm
c15b7ceff5729117e137decde42f78882c65b9a2bc471320eae39ea2e6641ea4  xorg-x11-server-Xorg-1.15.0-26.el6.centos.0.1.x86_64.rpm
7dbf0776cc4df9022c57b9784b4e3a2a03a0edd9476081325dd20cdca43011da  xorg-x11-server-Xvfb-1.15.0-26.el6.centos.0.1.x86_64.rpm

Source:
53dd0f31ccc34d4446dfd0900067d002ccbda900a570ab70935b0e161bd400ca  xorg-x11-server-1.15.0-26.el6.centos.0.1.src.rpm