CVE-2017-13720: Improper check for end of string in PatterMatch caused invalid reads (bsc#1054285)
CVE-2017-13722: Malformed PCF file could have caused DoS or leak information (bsc#1049692)
Prevent the X server from accessing arbitrary files as root. It is not possible to leak information, but special files can be touched allowing for causing side effects (bsc#1050459)