CVE-2016-3158

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    CVE-2016-3158

    Published: 13 Apr 2016Last Modified: 16 Apr 2026

    Summary:

    Details: The xrstor function in arch/x86/xstate.c in Xen 4.x does not properly handle writes to the hardware FSW.ES bit when running on AMD64 processors, which allows local guest OS users to obtain sensitive register content information from another guest by leveraging pending exception and mask bits. NOTE: this vulnerability exists because of an incorrect fix for CVE-2013-2076.

    References: http://support.citrix.com/article/CTX209443, http://lists.fedoraproject.org/pipermail/package-announce/2016-April/181699.html, http://www.debian.org/security/2016/dsa-3554, http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html, http://www.securityfocus.com/bid/85714, http://xenbits.xen.org/xsa/advisory-172.html, http://lists.fedoraproject.org/pipermail/package-announce/2016-April/181729.html, http://www.securitytracker.com/id/1035435, http://xenbits.xen.org/xsa/xsa172-4.3.patch, http://xenbits.xen.org/xsa/xsa172.patch

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: N/A

    Events:

    Introduced- None
    Fixed -None

    Affected versions

    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
    CVE-2016-3158 | CVE-DB