Provide references for CVE-2013-7439.
Where can I find more information about CVE-2013-7439?
References are available at: http://www.ubuntu.com/usn/USN-2568-1, http://www.oracle.com/technetwork/topics/security/bulletinjul2015-2511963.html, http://www.securityfocus.com/bid/73962, http://www.debian.org/security/2015/dsa-3224, http://seclists.org/oss-sec/2015/q2/81, http://lists.x.org/archives/xorg-announce/2015-April/002561.html, https://bugs.freedesktop.org/show_bug.cgi?id=56508.