UBUNTU-CVE-2021-46920

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    UBUNTU-CVE-2021-46920

    Published: 27 Feb 2024Last Modified: 24 Oct 2025
    Upstream:
    CVE-2021-46920

    Summary:

    Details: In the Linux kernel, the following vulnerability has been resolved: dmaengine: idxd: Fix clobbering of SWERR overflow bit on writeback Current code blindly writes over the SWERR and the OVERFLOW bits. Write back the bits actually read instead so the driver avoids clobbering the OVERFLOW bit that comes after the register is read.

    References: https://ubuntu.com/security/CVE-2021-46920, https://git.kernel.org/linus/ea941ac294d75d0ace50797aebf0056f6f8f7a7f, https://git.kernel.org/stable/c/a5ad12d5d69c63af289a37f05187a0c6fe93553d, https://git.kernel.org/stable/c/02981a44a0e402089775416371bd2e0c935685f8, https://git.kernel.org/stable/c/ea941ac294d75d0ace50797aebf0056f6f8f7a7f, https://www.cve.org/CVERecord?id=CVE-2021-46920

    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-2021-46920 | CVE-DB