https://bugzilla.redhat.com/show_bug.cgi?id=752375
http://rwmj.wordpress.com/2011/12/22/cve-2011-4127-privilege-escalation-from-...
The very unfortunate part about this is it easily allows guests to read and write parts of host devices that they are not supposed to. For example, if a guest was confined to host device /dev/sda3, it could read or write other partitions or the boot sector on /dev/sda.
вот так вот. уязвимы как минимум рхел4 и рхел6