OCaml before 4.03.0 does not properly handle sign extensions, which allows remote attackers to conduct buffer overflow attacks or obtain sensitive information as demonstrated by a long string to the String.copy function.
https://security.gentoo.org/glsa/201702-15
https://access.redhat.com/errata/RHSA-2016:1296
http://www.securityfocus.com/bid/89318
http://www.oracle.com/technetwork/topics/security/linuxbulletinjul2016-3090544.html
http://www.openwall.com/lists/oss-security/2016/04/29/6
http://www.openwall.com/lists/oss-security/2016/04/29/1
http://rhn.redhat.com/errata/RHSA-2017-0565.html
http://rhn.redhat.com/errata/RHSA-2017-0564.html
http://rhn.redhat.com/errata/RHSA-2016-2576.html
http://lists.opensuse.org/opensuse-updates/2016-09/msg00037.html
http://lists.opensuse.org/opensuse-updates/2016-05/msg00081.html
http://lists.fedoraproject.org/pipermail/package-announce/2016-May/184507.html