The ib_uverbs_poll_cq function in drivers/infiniband/core/uverbs_cmd.c in the Linux kernel before 2.6.37 does not initialize a certain response buffer, which allows local users to obtain potentially sensitive information from kernel memory via vectors that cause this buffer to be only partially filled, a different vulnerability than CVE-2010-4649.
http://rhn.redhat.com/errata/RHSA-2011-0927.html
http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.37
http://www.securityfocus.com/bid/46488