CVE-2016-9588 Kernel: kvm: nVMX: uncaught software exceptions in L1 guest lead to DoS

[P J P <ppandit () redhat com>]

  Hello,

Linux kernel built with the KVM virtualisation support(CONFIG_KVM), with 
nested virtualisation(nVMX) feature enabled(nested=1), is vulnerable to an 
uncaught exceptions issue. It could occur if a L2 guest was to throw an 
exception which is not handled by L1 guest.

A L1 guest user could use this flaw to crash the guest resulting in DoS.

Upstream patch
--------------
  -> https://www.spinics.net/lists/kvm/msg142495.html

'CVE-2016-9588' has been assigned to this issue by Red Hat Inc.

Thank you.
--
Prasad J Pandit / Red Hat Product Security Team
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