UBUNTU-CVE-2021-3546

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    UBUNTU-CVE-2021-3546

    Published: 2 Jun 2021Last Modified: 4 Feb 2026
    Upstream:
    CVE-2021-3546

    Summary:

    Details: An out-of-bounds write vulnerability was found in the virtio vhost-user GPU device (vhost-user-gpu) of QEMU in versions up to and including 6.0. The flaw occurs while processing the 'VIRTIO_GPU_CMD_GET_CAPSET' command from the guest. It could allow a privileged guest user to crash the QEMU process on the host, resulting in a denial of service condition, or potential code execution with the privileges of the QEMU process.

    References: https://ubuntu.com/security/CVE-2021-3546, https://lists.nongnu.org/archive/html/qemu-devel/2021-05/msg01155.html, https://lists.nongnu.org/archive/html/qemu-devel/2021-05/msg01154.html, https://ubuntu.com/security/notices/USN-5010-1, https://ubuntu.com/security/notices/USN-5307-1, https://www.cve.org/CVERecord?id=CVE-2021-3546

    Affected packages

    Package

    Name: qemu

    Purl: pkg:deb/ubuntu/qemu@1:4.2-3ubuntu6.17?arch=source&distro=focal

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -1:4.2-3ubuntu6.17

    Affected versions

    1:4.0+dfsg-0ubuntu9

    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-2021-3546 | CVE-DB