CVE-2019-3887

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.

• CWE-863
• CWE-863

• https://www.securityfocus.com/bid/107850Third Party Advisory, VDB Entry
• https://access.redhat.com/errata/RHSA-2019:2703Third Party Advisory
• https://access.redhat.com/errata/RHSA-2019:2741Third Party Advisory
• https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3887Issue Tracking, Patch, Third Party Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IWPOIII2L73HV5PGXSGMRMKQIK47UIYE/
• https://usn.ubuntu.com/3979-1/Third Party Advisory
• https://usn.ubuntu.com/3980-1/Third Party Advisory
• https://usn.ubuntu.com/3980-2/Third Party Advisory
• https://www.securityfocus.com/bid/107850Third Party Advisory, VDB Entry
• https://access.redhat.com/errata/RHSA-2019:2703Third Party Advisory
• https://access.redhat.com/errata/RHSA-2019:2741Third Party Advisory
• https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3887Issue Tracking, Patch, Third Party Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IWPOIII2L73HV5PGXSGMRMKQIK47UIYE/
• https://usn.ubuntu.com/3979-1/Third Party Advisory
• https://usn.ubuntu.com/3980-1/Third Party Advisory
• https://usn.ubuntu.com/3980-2/Third Party Advisory

Published

Apr 9, 2019

Last Modified

Jun 17, 2026

Status

Modified

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