UBUNTU-CVE-2016-3157

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    UBUNTU-CVE-2016-3157

    Published: 12 Apr 2016Last Modified: 26 Aug 2026
    Upstream:
    CVE-2016-3157
    Aliases:
    USN-2965-1
    USN-2965-2
    USN-2965-3

    Summary:

    Details: The __switch_to function in arch/x86/kernel/process_64.c in the Linux kernel does not properly context-switch IOPL on 64-bit PV Xen guests, which allows local guest OS users to gain privileges, cause a denial of service (guest OS crash), or obtain sensitive information by leveraging I/O port access.

    References: https://ubuntu.com/security/CVE-2016-3157, http://xenbits.xen.org/xsa/advisory-171.html, http://xenbits.xen.org/xsa/xsa171.patch, https://ubuntu.com/security/notices/USN-2965-1, https://ubuntu.com/security/notices/USN-2965-4, https://ubuntu.com/security/notices/USN-2965-3, https://ubuntu.com/security/notices/USN-2965-2, https://ubuntu.com/security/notices/USN-2971-2, https://ubuntu.com/security/notices/USN-2971-3, https://ubuntu.com/security/notices/USN-2971-1, https://ubuntu.com/security/notices/USN-2970-1, https://ubuntu.com/security/notices/USN-2969-1, https://ubuntu.com/security/notices/USN-2968-1, https://ubuntu.com/security/notices/USN-2968-2, https://ubuntu.com/security/notices/USN-2996-1, https://ubuntu.com/security/notices/USN-2997-1, https://www.cve.org/CVERecord?id=CVE-2016-3157

    Affected packages

    Package

    Name: linux

    Purl: pkg:deb/ubuntu/linux?arch=source&distro=trusty

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -3.13.0-86.130

    Affected versions

    3.11.0-12.19

    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
    UBUNTU-CVE-2016-3157 | CVE-DB