UBUNTU-CVE-2021-46916

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    UBUNTU-CVE-2021-46916

    Published: 27 Feb 2024Last Modified: 24 Oct 2025
    Upstream:
    CVE-2021-46916

    Summary:

    Details: In the Linux kernel, the following vulnerability has been resolved: ixgbe: Fix NULL pointer dereference in ethtool loopback test The ixgbe driver currently generates a NULL pointer dereference when performing the ethtool loopback test. This is due to the fact that there isn't a q_vector associated with the test ring when it is setup as interrupts are not normally added to the test rings. To address this I have added code that will check for a q_vector before returning a napi_id value. If a q_vector is not present it will return a value of 0.

    References: https://ubuntu.com/security/CVE-2021-46916, https://git.kernel.org/linus/31166efb1cee348eb6314e9c0095d84cbeb66b9d, https://git.kernel.org/stable/c/758d19098df4b0bbca9f40d6ae6c82c9c18b9bba, https://git.kernel.org/stable/c/31166efb1cee348eb6314e9c0095d84cbeb66b9d, https://www.cve.org/CVERecord?id=CVE-2021-46916

    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-2021-46916 | CVE-DB