UBUNTU-CVE-2018-14678

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    UBUNTU-CVE-2018-14678

    Published: 28 Jul 2018Last Modified: 22 Apr 2026
    Upstream:
    CVE-2018-14678

    Summary:

    Details: An issue was discovered in the Linux kernel through 4.17.11, as used in Xen through 4.11.x. The xen_failsafe_callback entry point in arch/x86/entry/entry_64.S does not properly maintain RBX, which allows local users to cause a denial of service (uninitialized memory usage and system crash). Within Xen, 64-bit x86 PV Linux guest OS users can trigger a guest OS crash or possibly gain privileges.

    References: https://ubuntu.com/security/CVE-2018-14678, https://xenbits.xen.org/xsa/advisory-274.html, https://git.kernel.org/linus/b3681dd548d06deb2e1573890829dff4b15abf46, https://ubuntu.com/security/notices/USN-3931-1, https://ubuntu.com/security/notices/USN-3931-2, https://www.cve.org/CVERecord?id=CVE-2018-14678

    Affected packages

    Package

    Name: linux-azure

    Purl: pkg:deb/ubuntu/[email protected]~14.04.1?arch=source&distro=trusty

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -4.15.0-1041.45~14.04.1

    Affected versions

    4.15.0-1023.24~14.04.1
    4.15.0-1030.31~14.04.1
    4.15.0-1031.32~14.04.1
    4.15.0-1032.33~14.04.2
    4.15.0-1035.36~14.04.2
    4.15.0-1036.38~14.04.2
    4.15.0-1037.39~14.04.2
    4.15.0-1039.41~14.04.2
    4.15.0-1040.44~14.04.1

    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