dnsmasq 2.25 allows remote attackers to cause a denial of service (daemon crash) by (1) renewing a nonexistent lease or (2) sending a DHCPREQUEST for an IP address that is not in the same network, related to the DHCP NAK response from the daemon.
https://exchange.xforce.ibmcloud.com/vulnerabilities/43929
http://www.thekelleys.org.uk/dnsmasq/CHANGELOG
http://www.openwall.com/lists/oss-security/2008/07/08/8
http://www.openwall.com/lists/oss-security/2008/07/03/4
http://www.openwall.com/lists/oss-security/2008/07/02/4
http://www.openwall.com/lists/oss-security/2008/07/01/8
http://www.openwall.com/lists/oss-security/2008/06/30/7
http://freshmeat.net/projects/dnsmasq/?branch_id=1991&release_id=217681