The xmlParseElementDecl function in parser.c in libxml2 before 2.9.4 allows context-dependent attackers to cause a denial of service (heap-based buffer underread and application crash) via a crafted file, involving xmlParseName.
https://www.tenable.com/security/tns-2016-18
https://www.debian.org/security/2016/dsa-3593
https://support.apple.com/HT206905
https://support.apple.com/HT206904
https://support.apple.com/HT206903
https://support.apple.com/HT206902
https://support.apple.com/HT206901
https://support.apple.com/HT206899
https://kc.mcafee.com/corporate/index?page=content&id=SB10170
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05194709
https://git.gnome.org/browse/libxml2/commit/?id=00906759053986b8079985644172085f74331f83
https://access.redhat.com/errata/RHSA-2016:1292
http://www.ubuntu.com/usn/USN-2994-1
http://www.securitytracker.com/id/1036348
http://www.securityfocus.com/bid/90864
http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html
http://www.oracle.com/technetwork/topics/security/linuxbulletinjul2016-3090544.html
http://www.oracle.com/technetwork/topics/security/bulletinjul2016-3090568.html
http://www.openwall.com/lists/oss-security/2016/05/25/2
http://rhn.redhat.com/errata/RHSA-2016-2957.html
http://lists.apple.com/archives/security-announce/2016/Jul/msg00005.html
http://lists.apple.com/archives/security-announce/2016/Jul/msg00003.html
http://lists.apple.com/archives/security-announce/2016/Jul/msg00002.html
http://lists.apple.com/archives/security-announce/2016/Jul/msg00001.html
http://lists.apple.com/archives/security-announce/2016/Jul/msg00000.html