CVE-2014-7155

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    CVE-2014-7155

    Published: 2 Oct 2014Last Modified: 10 Apr 2026

    Summary:

    Details: The x86_emulate function in arch/x86/x86_emulate/x86_emulate.c in Xen 4.4.x and earlier does not properly check supervisor mode permissions, which allows local HVM users to cause a denial of service (guest crash) or gain guest kernel mode privileges via vectors involving an (1) HLT, (2) LGDT, (3) LIDT, or (4) LMSW instruction.

    References: http://lists.fedoraproject.org/pipermail/package-announce/2014-October/140418.html, http://lists.fedoraproject.org/pipermail/package-announce/2014-October/140483.html, http://lists.opensuse.org/opensuse-security-announce/2014-10/msg00002.html, http://lists.opensuse.org/opensuse-security-announce/2014-10/msg00003.html, http://secunia.com/advisories/61858, http://secunia.com/advisories/61890, http://security.gentoo.org/glsa/glsa-201412-42.xml, http://support.citrix.com/article/CTX200218, http://www.debian.org/security/2014/dsa-3041, http://www.securityfocus.com/bid/70057, http://www.securitytracker.com/id/1030888, http://xenbits.xen.org/xsa/advisory-105.html, http://xenbits.xen.org/xsa/advisory-105.html

    Affected packages

    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-2014-7155 | CVE-DB