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medium5.6

CVE-2019-3887

A flaw was found in the way KVM hypervisor handled x2APIC Machine Specific Rregister (MSR) access with nested(=1) virtualization enabled.

Impact

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.

Affected products

VendorProductAffected versions
LinuxLinux Kernel
from 4.16
FedoraprojectFedora
Version 29
CanonicalUbuntu Linux
Versions 18.04, 18.10, 19.04
RedhatEnterprise Linux
Version 8.0
RedhatEnterprise Linux Eus
Versions 8.1, 8.2, 8.4
RedhatEnterprise Linux For Real Time
Version 8
RedhatEnterprise Linux For Real Time For Nfv
Version 8
RedhatEnterprise Linux For Real Time For Nfv Tus
Versions 8.2, 8.4
RedhatEnterprise Linux For Real Time Tus
Versions 8.2, 8.4
RedhatEnterprise Linux Server Aus
Versions 8.2, 8.4
RedhatEnterprise Linux Server Tus
Versions 8.2, 8.4

Weakness classification

CWE-863

References