Snort before 2.8.5.1, when the -v option is enabled, allows remote attackers to cause a denial of service (application crash) via a crafted IPv6 packet that uses the (1) TCP or (2) ICMP protocol.
https://exchange.xforce.ibmcloud.com/vulnerabilities/53912
http://www.vupen.com/english/advisories/2009/3014
http://www.openwall.com/lists/oss-security/2009/10/25/5
http://vrt-sourcefire.blogspot.com/2009/10/snort-2851-release.html
http://securitytracker.com/id?1023076
http://secunia.com/advisories/37135