CVE-2021-20321

    Dashboard / Vulnerabilities / CVE-2021-20321

    CVE-2021-20321

    Published: 18 Feb 2022Last Modified: 16 Apr 2026

    Summary:

    Details: A race condition accessing file object in the Linux kernel OverlayFS subsystem was found in the way users do rename in specific way with OverlayFS. A local user could use this flaw to crash the system.

    References: https://lore.kernel.org/all/20211011134508.748956131%40linuxfoundation.org/, https://lists.debian.org/debian-lts-announce/2022/03/msg00012.html, https://www.debian.org/security/2022/dsa-5096, https://bugzilla.redhat.com/show_bug.cgi?id=2013242

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: N/A

    Events:

    Introduced- None
    Fixed -None

    Affected versions

    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
    CVE-2021-20321 | CVE-DB