USN-3652-1

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    USN-3652-1

    Published: 22 May 2018Last Modified: 3 Jun 2026

    Summary: linux, linux-aws, linux-azure, linux-gcp, linux-kvm, linux-oem vulnerability

    Details: Jann Horn and Ken Johnson discovered that microprocessors utilizing speculative execution of a memory read may allow unauthorized memory reads via a sidechannel attack. This flaw is known as Spectre Variant 4. A local attacker could use this to expose sensitive information, including kernel memory.

    References: https://ubuntu.com/security/notices/USN-3652-1, https://ubuntu.com/security/CVE-2018-3639

    Affected packages

    Package

    Name: linux

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

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -4.15.0-22.24

    Affected versions

    4.13.0-16.19
    4.13.0-17.20
    4.13.0-25.29
    4.13.0-32.35

    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