lib/gssapi/spnego/spnego_mech.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 SPNEGO packet that is mishandled during a gss_inquire_context call.
https://security.gentoo.org/glsa/201611-14
https://github.com/krb5/krb5/commit/b51b33f2bc5d1497ddf5bd107f791c101695000d
http://www.ubuntu.com/usn/USN-2810-1
http://www.securitytracker.com/id/1034084
http://www.securityfocus.com/bid/90687
http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html
http://www.debian.org/security/2015/dsa-3395
http://lists.opensuse.org/opensuse-security-announce/2015-11/msg00022.html
http://lists.opensuse.org/opensuse-security-announce/2015-11/msg00014.html
http://lists.opensuse.org/opensuse-security-announce/2015-11/msg00007.html
http://lists.opensuse.org/opensuse-security-announce/2015-11/msg00006.html