The prepare_vmcs02 function in arch/x86/kvm/vmx.c in the...
High severity
Unreviewed
Published
May 13, 2022
to the GitHub Advisory Database
•
Updated Feb 2, 2023
Description
Published by the National Vulnerability Database
Sep 26, 2017
Published to the GitHub Advisory Database
May 13, 2022
Last updated
Feb 2, 2023
The prepare_vmcs02 function in arch/x86/kvm/vmx.c in the Linux kernel through 4.13.3 does not ensure that the "CR8-load exiting" and "CR8-store exiting" L0 vmcs02 controls exist in cases where L1 omits the "use TPR shadow" vmcs12 control, which allows KVM L2 guest OS users to obtain read and write access to the hardware CR8 register.
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