Spice-xpi uses predictable name for usbrdrctl log file which a malicious user could use to overwrite arbitrary files via a symlink attack, with the privileges of the user running spice-xpi.
This issue has been addressed in following products: Red Hat Enterprise Linux 6 Via RHSA-2011:0426 https://rhn.redhat.com/errata/RHSA-2011-0426.html
This bug has been fixed almost a year ago, closing.