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Red Hat OpenShift: CVE-2019-3887: Kernel: KVM: nVMX: guest accesses L0 MSR causes potential DoS

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Red Hat OpenShift: CVE-2019-3887: Kernel: KVM: nVMX: guest accesses L0 MSR causes potential DoS

Severity
5
CVSS
(AV:L/AC:M/Au:N/C:N/I:N/A:C)
Published
04/09/2019
Created
12/30/2020
Added
12/29/2020
Modified
12/29/2020

Description

A flaw was found in the way KVM hypervisor handled x2APIC Machine Specific Rregister (MSR) access with nested(=1) virtualization enabled. In that, L1 guest could access L0's APIC register values via L2 guest, when 'virtualize x2APIC mode' is enabled. A guest could use this flaw to potentially crash the host kernel resulting in DoS issue. Kernel versions from 4.16 and newer are vulnerable to this issue.

Solution(s)

  • linuxrpm-upgrade-redhat-coreos

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