UBUNTU-CVE-2020-29373

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    UBUNTU-CVE-2020-29373

    Published: 28 Nov 2020Last Modified: 24 Oct 2025
    Upstream:
    CVE-2020-29373

    Summary:

    Details: An issue was discovered in fs/io_uring.c in the Linux kernel before 5.6. It unsafely handles the root directory during path lookups, and thus a process inside a mount namespace can escape to unintended filesystem locations, aka CID-ff002b30181d.

    References: https://ubuntu.com/security/CVE-2020-29373, https://git.kernel.org/linus/ff002b30181d30cdfbca316dadd099c3ca0d739c, https://bugs.chromium.org/p/project-zero/issues/detail?id=2011, https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.6, https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ff002b30181d30cdfbca316dadd099c3ca0d739c, https://www.cve.org/CVERecord?id=CVE-2020-29373

    Affected packages

    Package

    Name: linux-hwe-edge

    Purl: pkg:deb/ubuntu/[email protected]~16.04.1?arch=source&distro=xenial

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -None

    Affected versions

    4.8.0-28.30~16.04.1
    4.8.0-30.32~16.04.1
    4.8.0-32.34~16.04.1
    4.8.0-34.36~16.04.1

    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
    UBUNTU-CVE-2020-29373 | CVE-DB