UBUNTU-CVE-2022-42327

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    UBUNTU-CVE-2022-42327

    Published: 1 Nov 2022Last Modified: 17 Oct 2026
    Upstream:
    CVE-2022-42327

    Summary:

    Details: x86: unintended memory sharing between guests On Intel systems that support the "virtualize APIC accesses" feature, a guest can read and write the global shared xAPIC page by moving the local APIC out of xAPIC mode. Access to this shared page bypasses the expected isolation that should exist between two guests.

    References: https://ubuntu.com/security/CVE-2022-42327, https://xenbits.xen.org/xsa/advisory-412.html, https://xenbits.xenproject.org/xsa/advisory-412.txt, http://xenbits.xen.org/xsa/advisory-412.html, http://www.openwall.com/lists/oss-security/2022/11/01/3, https://www.cve.org/CVERecord?id=CVE-2022-42327

    Affected packages

    Package

    Name: xen

    Purl: pkg:deb/ubuntu/xen?arch=source&distro=xenial

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -None

    Affected versions

    4.5.1-0ubuntu1
    4.5.1-0ubuntu2

    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
    UBUNTU-CVE-2022-42327 | CVE-DB