UBUNTU-CVE-2021-37159

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    UBUNTU-CVE-2021-37159

    Published: 21 Jul 2021Last Modified: 9 Sept 2026
    Upstream:
    CVE-2021-37159
    Aliases:
    USN-5092-1
    USN-5092-2
    USN-5096-1

    Summary:

    Details: hso_free_net_device in drivers/net/usb/hso.c in the Linux kernel through 5.13.4 calls unregister_netdev without checking for the NETREG_REGISTERED state, leading to a use-after-free and a double free.

    References: https://ubuntu.com/security/CVE-2021-37159, https://www.spinics.net/lists/linux-usb/msg202228.html, https://lore.kernel.org/linux-usb/[email protected]/, https://ubuntu.com/security/notices/USN-5092-1, https://ubuntu.com/security/notices/USN-5092-2, https://ubuntu.com/security/notices/USN-5096-1, https://ubuntu.com/security/notices/USN-5115-1, https://ubuntu.com/security/notices/USN-5163-1, https://ubuntu.com/security/notices/USN-5164-1, https://ubuntu.com/security/notices/USN-5361-1, https://www.cve.org/CVERecord?id=CVE-2021-37159, https://ubuntu.com/security/notices/USN-6971-1

    Affected packages

    Package

    Name: linux

    Purl: pkg:deb/ubuntu/linux?arch=source&distro=trusty%2Fesm

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -3.13.0-199.250

    Affected versions

    3.11.0-12.19

    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-2021-37159 | CVE-DB