CVE-2021-20317

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    CVE-2021-20317

    Published: 27 Sept 2021Last Modified: 15 Mar 2026

    Summary:

    Details: A flaw was found in the Linux kernel. A corrupted timer tree caused the task wakeup to be missing in the timerqueue_add function in lib/timerqueue.c. This flaw allows a local attacker with special user privileges to cause a denial of service, slowing and eventually stopping the system while running OSP.

    References: https://cert-portal.siemens.com/productcert/pdf/ssa-222547.pdf, https://lists.debian.org/debian-lts-announce/2022/03/msg00012.html, https://www.debian.org/security/2022/dsa-5096, https://lists.debian.org/debian-lts-announce/2021/12/msg00012.html, https://bugzilla.redhat.com/show_bug.cgi?id=2005258, https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/commit/?id=511885d7061eda3eb1faf3f57dcc936ff75863f1

    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-2021-20317 | CVE-DB