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    CVE-2019-20794

    An issue was discovered in the Linux kernel 4.18 through 5.6.11 when unprivileged user namespaces are allowed. A user can create their own PID namespace, and mount a FUSE filesystem. Upon interaction with this FUSE filesystem, if the userspace component is terminated via a kill of the PID namespace's pid 1, it will result in a hung task, and resources being permanently locked up until system reboot. This can result in resource exhaustion.

    Published:May 9, 2020
    Last Modified:Nov 21, 2024
    EPS:May 9, 2020
    EPSS Score:0.00093
    CVSS Score:4.7

    Affected Products

    Vendor
    Linux
    Product
    Linux Kernel

    Exploits

    https://github.com/sargun/fuse-examplehttps://sourceforge.net/p/fuse/mailman/message/36598753/https://github.com/sargun/fuse-examplehttps://sourceforge.net/p/fuse/mailman/message/36598753/

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    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