Description

The nested_vmx_check_vmptr function in arch/x86/kvm/vmx.c in the Linux kernel through 4.9.8 improperly emulates the VMXON instruction, which allows KVM L1 guest OS users to cause a denial of service (host OS memory consumption) by leveraging the mishandling of page references.

References

http://www.debian.org/security/2017/dsa-3791

http://www.openwall.com/lists/oss-security/2017/01/31/4

http://www.securityfocus.com/bid/95878

https://access.redhat.com/errata/RHSA-2017:1842

https://access.redhat.com/errata/RHSA-2017:2077

https://bugzilla.redhat.com/show_bug.cgi?id=1417812

Details

Risk Information

CVSS v2

CVSS v3