The aun_incoming function in net/econet/af_econet.c in the Linux kernel before 2.6.37-rc6, when Econet is enabled, allows remote attackers to cause a denial of service (NULL pointer dereference and OOPS) by sending an Acorn Universal Networking (AUN) packet over UDP.
http://www.vupen.com/english/advisories/2011/0375
http://www.securityfocus.com/bid/45321
http://secunia.com/advisories/43291
http://lists.opensuse.org/opensuse-security-announce/2011-02/msg00002.html