UBUNTU-CVE-2019-3887

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    UBUNTU-CVE-2019-3887

    Published: 9 Apr 2019Last Modified: 4 Feb 2026
    Upstream:
    CVE-2019-3887

    Summary:

    Details: 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.

    References: https://ubuntu.com/security/CVE-2019-3887, https://www.openwall.com/lists/oss-security/2019/04/08/1, https://ubuntu.com/security/notices/USN-3979-1, https://ubuntu.com/security/notices/USN-3980-1, https://ubuntu.com/security/notices/USN-3980-2, https://www.cve.org/CVERecord?id=CVE-2019-3887

    Affected packages

    Package

    Name: linux-azure

    Purl: pkg:deb/ubuntu/[email protected]~18.04.1?arch=source&distro=bionic

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -4.18.0-1018.18~18.04.1

    Affected versions

    4.15.0-1002.2
    4.15.0-1003.3
    4.15.0-1004.4
    4.15.0-1008.8
    4.15.0-1009.9
    4.15.0-1012.12
    4.15.0-1013.13
    4.15.0-1014.14
    4.15.0-1018.18
    4.15.0-1019.19
    4.15.0-1021.21
    4.15.0-1022.23
    4.15.0-1023.24
    4.15.0-1025.26
    4.15.0-1028.29
    4.15.0-1030.31
    4.15.0-1031.32
    4.15.0-1032.33
    4.15.0-1035.36
    4.15.0-1036.38
    4.15.0-1037.39

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High