The Linux kernel component in IBM PowerKVM 2.1 before 2.1.1.3-65.10 and 3.1 before 3.1.0.2 allows guest OS users to cause a denial of service (host OS infinite loop and hang) via unspecified vectors.
http://www.securityfocus.com/bid/92123
http://www-01.ibm.com/support/docview.wss?uid=isg3T1023969