The xmlNextChar function in libxml2 2.9.2 does not properly check the state, which allows context-dependent attackers to cause a denial of service (heap-based buffer over-read and application crash) or obtain sensitive information via crafted XML data.
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c04944172
https://git.gnome.org/browse/libxml2/commit/?id=ab2b9a93ff19cedde7befbf2fcc48c6e352b6cbe
https://bugzilla.redhat.com/show_bug.cgi?id=1281936
https://bugzilla.gnome.org/show_bug.cgi?id=756263
http://www.ubuntu.com/usn/USN-2834-1
http://www.securitytracker.com/id/1034243
http://www.securityfocus.com/bid/77621
http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html
http://www.oracle.com/technetwork/topics/security/bulletinjan2016-2867206.html
http://www.openwall.com/lists/oss-security/2015/11/18/23
http://www.openwall.com/lists/oss-security/2015/11/17/5
http://www.debian.org/security/2015/dsa-3430
http://rhn.redhat.com/errata/RHSA-2016-1089.html
http://rhn.redhat.com/errata/RHSA-2015-2550.html
http://rhn.redhat.com/errata/RHSA-2015-2549.html
http://marc.info/?l=bugtraq&m=145382616617563&w=2
http://lists.opensuse.org/opensuse-updates/2016-01/msg00031.html
http://lists.opensuse.org/opensuse-updates/2015-12/msg00120.html