CVE-2016-4480

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    CVE-2016-4480

    Published: 18 May 2016Last Modified: 16 Apr 2026

    Summary:

    Details: The guest_walk_tables function in arch/x86/mm/guest_walk.c in Xen 4.6.x and earlier does not properly handle the Page Size (PS) page table entry bit at the L4 and L3 page table levels, which might allow local guest OS users to gain privileges via a crafted mapping of memory.

    References: http://www.securityfocus.com/bid/90710, http://www.securitytracker.com/id/1035901, http://www.debian.org/security/2016/dsa-3633, http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html, http://xenbits.xen.org/xsa/advisory-176.html

    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