UBUNTU-CVE-2021-3631

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    UBUNTU-CVE-2021-3631

    Published: 2 Mar 2022Last Modified: 20 Aug 2026
    Upstream:
    CVE-2021-3631
    Aliases:
    USN-5399-1

    Summary:

    Details: A flaw was found in libvirt while it generates SELinux MCS category pairs for VMs' dynamic labels. This flaw allows one exploited guest to access files labeled for another guest, resulting in the breaking out of sVirt confinement. The highest threat from this vulnerability is to confidentiality and integrity.

    References: https://ubuntu.com/security/CVE-2021-3631, https://ubuntu.com/security/notices/USN-5399-1, https://www.cve.org/CVERecord?id=CVE-2021-3631

    Affected packages

    Package

    Name: libvirt

    Purl: pkg:deb/ubuntu/libvirt?arch=source&distro=esm-infra-legacy%2Ftrusty

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -None

    Affected versions

    1.1.1-0ubuntu8
    1.1.1-0ubuntu9
    1.1.4-0ubuntu2
    1.1.4-0ubuntu3
    1.1.4-0ubuntu4
    1.1.4-0ubuntu5

    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-2021-3631 | CVE-DB