It was reported by XEN security team about a bug where a buggy or malicious HVM gues can crash the host or read data relating to other guests or the hypervisor itself. This certainly cause a bigger security risk in public cloud environment - such as Amazon Web Services or RackSpace Public Cloud where they use XEN has a choice of hypervisor for guest VM.
Probably that's the reason it was reported last week of AWS reboot across regions.
Probably that's the reason it was reported last week of AWS reboot across regions.
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