CVE-2021-4083

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    CVE-2021-4083

    Published: 18 Jan 2022Last Modified: 16 Apr 2026

    Summary:

    Details: A read-after-free memory flaw was found in the Linux kernel's garbage collection for Unix domain socket file handlers in the way users call close() and fget() simultaneously and can potentially trigger a race condition. This flaw allows a local user to crash the system or escalate their privileges on the system. This flaw affects Linux kernel versions prior to 5.16-rc4.

    References: https://lists.debian.org/debian-lts-announce/2022/03/msg00011.html, https://lists.debian.org/debian-lts-announce/2022/03/msg00012.html, https://security.netapp.com/advisory/ntap-20220217-0005/, https://www.debian.org/security/2022/dsa-5096, https://bugzilla.redhat.com/show_bug.cgi?id=2029923, https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=054aa8d439b9, https://www.oracle.com/security-alerts/cpujul2022.html

    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-2021-4083 | CVE-DB