UBUNTU-CVE-2021-4148

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    UBUNTU-CVE-2021-4148

    Published: 23 Mar 2022Last Modified: 25 Sept 2026
    Upstream:
    CVE-2021-4148

    Summary:

    Details: A vulnerability was found in the Linux kernel's block_invalidatepage in fs/buffer.c in the filesystem. A missing sanity check may allow a local attacker with user privilege to cause a denial of service (DOS) problem.

    References: https://ubuntu.com/security/CVE-2021-4148, https://lkml.org/lkml/2021/9/17/1037, https://lkml.org/lkml/2021/9/12/323, https://lore.kernel.org/linux-mm/[email protected]/, https://lore.kernel.org/lkml/CACkBjsYwLYLRmX8GpsDpMthagWOjWWrNxqY6ZLNQVr6yx+f5vA@mail.gmail.com/, https://lore.kernel.org/lkml/CAHbLzkrdGva2dzO36r62LKv_ip5trbMK0BO3vCeSBk2_7OE-zA@mail.gmail.com/, https://www.cve.org/CVERecord?id=CVE-2021-4148

    Affected packages

    Package

    Name: linux-hwe-edge

    Purl: pkg:deb/ubuntu/linux-hwe-edge?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-2021-4148 | CVE-DB