The XRenderQueryFilters function in X.org libXrender before 0.9.10 allows remote X servers to trigger out-of-bounds write operations via vectors involving filter name lengths.
www.openwall.com/lists/oss-security/2016/10/04/2
www.openwall.com/lists/oss-security/2016/10/04/4
www.securityfocus.com/bid/93369
www.securitytracker.com/id/1036945
cgit.freedesktop.org/xorg/lib/libXrender/commit/?id=8fad00b0b647ee662ce4737ca15be033b7a21714
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7WCKZFMZ76APAVMIRCUKKHEB4GAS7ZUP/
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZHUT5YOSWVMBJNWZGUQNZRBFIZKRM4A6/
lists.x.org/archives/xorg-announce/2016-October/002720.html
security.gentoo.org/glsa/201704-03