7s are errors indicating a hardware error in memory or on the bus. This can be due to problems in executables or with the hardware of the system. The Linux kernel uses a lot more capabilities of the CPU, Cache, and memory, and is more prone to faulting on marginal hardware. Red Hat Inc. Check the errata for updates and also the FTP site to see if newer versions are available. If the latest images still fail, it may be due to hardware.
Common suspects are memory or CPU-cache.
Try turning off the CPU-cache in the BIOS and see if the problem goes away. Also try swapping memory around in the motherboard slots to see if it is either slot or memory related.