CVE-2015-8555

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    CVE-2015-8555

    Published: 13 Apr 2016Last Modified: 16 Apr 2026

    Summary:

    Details: Xen 4.6.x, 4.5.x, 4.4.x, 4.3.x, and earlier do not initialize x86 FPU stack and XMM registers when XSAVE/XRSTOR are not used to manage guest extended register state, which allows local guest domains to obtain sensitive information from other domains via unspecified vectors.

    References: http://www.debian.org/security/2016/dsa-3519, http://xenbits.xen.org/xsa/advisory-165.html, https://security.gentoo.org/glsa/201604-03, http://xenbits.xen.org/xsa/advisory-165.html, http://support.citrix.com/article/CTX203879, http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html, http://www.securityfocus.com/bid/79543, http://www.securitytracker.com/id/1034477

    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-2015-8555 | CVE-DB