The 5.0.8 release of the host drivers were tested with and support the following OSes.
Oracle Linux 5 Update 10 with a Red Hat Enterprise Linux kernel.
Oracle Linux with 6 Update 5 with a Red Hat Enterprise Linux kernel.
Although Red Hat Enterprise kernels are supported, Oracle Virtual Networking host drivers are tested and qualified on Oracle Linux with RHEL-compatible kernels, not “pure” Red Hat Enterprise Linux ISO images.