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    CVE-2022-42327

    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.

    Published:Nov 1, 2022
    Last Modified:May 5, 2025
    EPS:Nov 1, 2022
    EPSS Score:0.00009
    CVSS Score:7.1

    Affected Products

    Vendor
    Fedoraproject
    Product
    Fedora
    Vendor
    Xen
    Product
    Xen

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-284 Improper Access Control

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    References

    http://www.openwall.com/lists/oss-security/2022/11/01/3
    http://xenbits.xen.org/xsa/advisory-412.html
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YTMITQBGC23MSDHUCAPCVGLMVXIBXQTQ/
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZLI2NPNEH7CNJO3VZGQNOI4M4EWLNKPZ/
    https://security.gentoo.org/glsa/202402-07
    https://xenbits.xenproject.org/xsa/advisory-412.txt
    http://www.openwall.com/lists/oss-security/2022/11/01/3
    http://xenbits.xen.org/xsa/advisory-412.html
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YTMITQBGC23MSDHUCAPCVGLMVXIBXQTQ/
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZLI2NPNEH7CNJO3VZGQNOI4M4EWLNKPZ/
    https://security.gentoo.org/glsa/202402-07
    https://xenbits.xenproject.org/xsa/advisory-412.txt

    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