lib/gssapi/krb5/iakerb.c in MIT Kerberos 5 (aka krb5) before 1.14 relies on an inappropriate context handle, which allows remote attackers to cause a denial of service (incorrect pointer read and process crash) via a crafted IAKERB packet that is mishandled during a gss_inquire_context call.
http://lists.opensuse.org/opensuse-security-announce/2015-11/msg00006.html
http://lists.opensuse.org/opensuse-security-announce/2015-11/msg00014.html
http://lists.opensuse.org/opensuse-security-announce/2015-11/msg00022.html
https://github.com/krb5/krb5/commit/e04f0283516e80d2f93366e0d479d13c9b5c8c2a
https://security.gentoo.org/glsa/201611-14
http://www.debian.org/security/2015/dsa-3395