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    CVE-2021-20317

    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.

    Published:Sep 23, 2021
    Last Modified:Nov 21, 2024
    EPS:Sep 27, 2021
    EPSS Score:0.00018
    CVSS Score:4.4

    Affected Products

    Vendor
    Debian
    Product
    Debian Linux
    Vendor
    Linux
    Product
    Linux Kernel
    Vendor
    Redhat
    Product
    Enterprise Linux
    Vendor
    Redhat
    Product
    Rhel Eus

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-665 Improper Initialization

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    References

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

    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