Integer overflow in the ib_uverbs_poll_cq function in drivers/infiniband/core/uverbs_cmd.c in the Linux kernel before 2.6.37 allows local users to cause a denial of service (memory corruption) or possibly have unspecified other impact via a large value of a certain structure member.
https://bugzilla.redhat.com/show_bug.cgi?id=667916
http://www.securityfocus.com/bid/46073