kvm_vcpu_events.interrupt.pad field must be initialized before being copied to userspace, otherwise kernel memory is leaked. Acknowledgements: Red Hat would like to thank Stephan Mueller of atsec information security for reporting this issue.
This issue has been addressed in following products: Red Hat Enterprise Linux 6 Via RHSA-2011:0007 https://rhn.redhat.com/errata/RHSA-2011-0007.html
This issue has been addressed in following products: Red Hat Enterprise Linux 5 Via RHSA-2011:0028 https://rhn.redhat.com/errata/RHSA-2011-0028.html