CVE-2015-4164

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    CVE-2015-4164

    Published: 15 Jun 2015Last Modified: 16 Apr 2026

    Summary:

    Details: The compat_iret function in Xen 3.1 through 4.5 iterates the wrong way through a loop, which allows local 32-bit PV guest administrators to cause a denial of service (large loop and system hang) via a hypercall_iret call with EFLAGS.VM set.

    References: http://www.debian.org/security/2015/dsa-3286, http://xenbits.xen.org/xsa/advisory-136.html, https://security.gentoo.org/glsa/201604-03, http://lists.opensuse.org/opensuse-security-announce/2015-06/msg00004.html, http://lists.opensuse.org/opensuse-security-announce/2015-06/msg00007.html, http://lists.opensuse.org/opensuse-security-announce/2015-06/msg00029.html, http://lists.opensuse.org/opensuse-security-announce/2015-06/msg00030.html, http://lists.opensuse.org/opensuse-security-announce/2015-07/msg00014.html, http://lists.opensuse.org/opensuse-security-announce/2015-09/msg00027.html, http://support.citrix.com/article/CTX201145, http://www.securityfocus.com/bid/75149, http://www.securitytracker.com/id/1032569

    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