It was discovered that the zebra daemon in Quagga before 1.0.20161017 suffered from a stack-based buffer overflow when processing IPv6 Neighbor Discovery messages. The root cause was relying on BUFSIZ to be compatible with a message size; however, BUFSIZ is system-dependent.
https://www.debian.org/security/2016/dsa-3695
https://security.gentoo.org/glsa/201701-48
https://github.com/Quagga/quagga/commit/cfb1fae25f8c092e0d17073eaf7bd428ce1cd546
https://bugzilla.redhat.com/show_bug.cgi?id=1386109
http://www.securityfocus.com/bid/93775