USN-3690-2

    Dashboard / Vulnerabilities / USN-3690-2

    USN-3690-2

    Published: 5 Jul 2018Last Modified: 10 Feb 2026

    Summary: amd64-microcode regression

    Details: USN-3690-1 provided updated microcode for AMD processors to address CVE-2017-5715 (aka Spectre). Unfortunately, the update caused some systems to fail to boot. This update reverts the update for Ubuntu 14.04 LTS. We apologize for the inconvenience. Original advisory details: Jann Horn discovered that microprocessors utilizing speculative execution and branch prediction may allow unauthorized memory reads via sidechannel attacks. This flaw is known as Spectre. A local attacker could use this to expose sensitive information, including kernel memory. This update provides the microcode updates for AMD 17H family processors required for the corresponding Linux kernel updates.

    References: https://ubuntu.com/security/notices/USN-3690-2, https://launchpad.net/bugs/1779092

    Affected packages

    Package

    Name: amd64-microcode

    Purl: pkg:deb/ubuntu/[email protected]~ubuntu0.14.04.2+really20130710.1?arch=source&distro=trusty

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -3.20180524.1~ubuntu0.14.04.2+really20130710.1

    Affected versions

    1.20120910-3

    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