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    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.

    Published:Apr 5, 2019
    Last Modified:Nov 21, 2024
    EPS:Apr 9, 2019
    EPSS Score:0.00011
    CVSS Score:5.6

    Affected Products

    Vendor
    Canonical
    Product
    Ubuntu Linux
    Vendor
    Fedoraproject
    Product
    Fedora
    Vendor
    Linux
    Product
    Linux Kernel
    Vendor
    Redhat
    Product
    Enterprise Linux
    Vendor
    Redhat
    Product
    Enterprise Linux Eus
    Vendor
    Redhat
    Product
    Enterprise Linux For Real Time
    Vendor
    Redhat
    Product
    Enterprise Linux For Real Time For Nfv
    Vendor
    Redhat
    Product
    Enterprise Linux For Real Time For Nfv Tus
    Vendor
    Redhat
    Product
    Enterprise Linux For Real Time Tus
    Vendor
    Redhat
    Product
    Enterprise Linux Server Aus
    Vendor
    Redhat
    Product
    Enterprise Linux Server Tus

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-863 Incorrect Authorization

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

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    References

    http://www.securityfocus.com/bid/107850
    https://access.redhat.com/errata/RHSA-2019:2703
    https://access.redhat.com/errata/RHSA-2019:2741
    https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3887
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IWPOIII2L73HV5PGXSGMRMKQIK47UIYE/
    https://usn.ubuntu.com/3979-1/
    https://usn.ubuntu.com/3980-1/
    https://usn.ubuntu.com/3980-2/
    http://www.securityfocus.com/bid/107850
    https://access.redhat.com/errata/RHSA-2019:2703
    https://access.redhat.com/errata/RHSA-2019:2741
    https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3887
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IWPOIII2L73HV5PGXSGMRMKQIK47UIYE/
    https://usn.ubuntu.com/3979-1/
    https://usn.ubuntu.com/3980-1/
    https://usn.ubuntu.com/3980-2/

    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