UBUNTU-CVE-2021-4023

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    UBUNTU-CVE-2021-4023

    Published: 10 Mar 2022Last Modified: 24 Oct 2025
    Upstream:
    CVE-2021-4023

    Summary:

    Details: A flaw was found in the io-workqueue implementation in the Linux kernel versions prior to 5.15-rc1. The kernel can panic when an improper cancellation operation triggers the submission of new io-uring operations during a shortage of free space. This flaw allows a local user with permissions to execute io-uring requests to possibly crash the system.

    References: https://ubuntu.com/security/CVE-2021-4023, https://access.redhat.com/security/cve/CVE-2021-4023, https://lkml.org/lkml/2021/9/8/64, https://git.kernel.dk/cgit/linux-block/commit/?h=io_uring-5.15&id=713b9825a4c47897f66ad69409581e7734a8728e, https://www.cve.org/CVERecord?id=CVE-2021-4023

    Affected packages

    Package

    Name: linux-hwe-edge

    Purl: pkg:deb/ubuntu/[email protected]~16.04.1?arch=source&distro=xenial

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -None

    Affected versions

    4.8.0-28.30~16.04.1
    4.8.0-30.32~16.04.1
    4.8.0-32.34~16.04.1
    4.8.0-34.36~16.04.1

    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
    UBUNTU-CVE-2021-4023 | CVE-DB