Use-after-free vulnerability in a certain Red Hat patch for the RPC server sockets functionality in the Linux kernel 2.6.32 on Red Hat Enterprise Linux (RHEL) 6 might allow remote attackers to cause a denial of service (crash) via malformed data in a packet, related to lockd and the svc_xprt_received function.
https://rhn.redhat.com/errata/RHSA-2011-0329.html
https://bugzilla.redhat.com/show_bug.cgi?id=678144