CVE-2013-2076

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    CVE-2013-2076

    Published: 28 Aug 2013Last Modified: 16 Apr 2026

    Summary:

    Details: Xen 4.0.x, 4.1.x, and 4.2.x, when running on AMD64 processors, only save/restore the FOP, FIP, and FDP x87 registers in FXSAVE/FXRSTOR when an exception is pending, which allows one domain to determine portions of the state of floating point instructions of other domains, which can be leveraged to obtain sensitive information such as cryptographic keys, a similar vulnerability to CVE-2006-1056. NOTE: this is the documented behavior of AMD64 processors, but it is inconsistent with Intel processors in a security-relevant fashion that was not addressed by the kernels.

    References: http://secunia.com/advisories/55082, http://security.gentoo.org/glsa/glsa-201309-24.xml, http://www.debian.org/security/2014/dsa-3006, http://lists.opensuse.org/opensuse-security-announce/2014-03/msg00021.html, http://www.openwall.com/lists/oss-security/2013/06/03/1

    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-2013-2076 | CVE-DB