The bluetooth subsystem in the Linux kernel before 3.0-rc4 does not properly initialize certain data structures, which allows local users to obtain potentially sensitive information from kernel memory via a crafted getsockopt system call, related to (1) the l2cap_sock_getsockopt_old function in net/bluetooth/l2cap_sock.c and (2) the rfcomm_sock_getsockopt_old function in net/bluetooth/rfcomm/sock.c.
http://marc.info/?l=bugtraq&m=139447903326211&w=2
http://permalink.gmane.org/gmane.linux.bluez.kernel/12909
http://rhn.redhat.com/errata/RHSA-2011-0927.html
http://securitytracker.com/id?1025778
http://www.kernel.org/pub/linux/kernel/v3.0/testing/ChangeLog-3.0-rc4
http://www.openwall.com/lists/oss-security/2011/06/24/2