UBUNTU-CVE-2021-42327

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    UBUNTU-CVE-2021-42327

    Published: 21 Oct 2021Last Modified: 4 Feb 2026
    Upstream:
    CVE-2021-42327

    Summary:

    Details: dp_link_settings_write in drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c in the Linux kernel through 5.14.14 allows a heap-based buffer overflow by an attacker who can write a string to the AMD GPU display drivers debug filesystem. There are no checks on size within parse_write_buffer_into_params when it uses the size of copy_from_user to copy a userspace buffer into a 40-byte heap buffer.

    References: https://ubuntu.com/security/CVE-2021-42327, https://lists.freedesktop.org/archives/amd-gfx/2021-October/070170.html, https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/log/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c, https://www.mail-archive.com/[email protected]/msg69080.html, https://ubuntu.com/security/notices/USN-5165-1, https://ubuntu.com/security/notices/USN-5265-1, https://ubuntu.com/security/notices/USN-5362-1, https://www.cve.org/CVERecord?id=CVE-2021-42327

    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-2021-42327 | CVE-DB