http://secunia.com/advisories/24618/. There exist multiple, local, IPv6 vulnerabilities in the Linux kernel prior to 220.127.116.11. These vulnerabilities could lead to local Denial of Service (DoS) attacks, including kernel crash. This can be exploited locally, no remote exploitation has been reported at this time.
http://secunia.com/advisories/24205/ It is recommended to upgrade to 18.104.22.168 or 22.214.171.124. These vulnerabilities include security restrictions bypass, cross site scripting, disclosure of personal data and even (possibly) system compromise.
http://madwifi.org/wiki/news/20061207/release-0-9-2-1-fixes-critical-sec... This affects Linux computers that use the madwifi driver for wireless cards. These drivers are typically used for wireless adapters using the Atheros chipset.
http://www.intel.com/support/network/sb/CS-023726.htm There is a buffer overflow that affects the drivers for all Intel PCI, PCI-X and PCIe network adapters. This could cause a privilege escalation on any computer that has one of these network drivers.