CVE-2021-3631

    Dashboard / Vulnerabilities / CVE-2021-3631

    CVE-2021-3631

    Published: 2 Mar 2022Last Modified: 8 Jul 2026

    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://lists.debian.org/debian-lts-announce/2024/04/msg00000.html, https://access.redhat.com/errata/RHSA-2021:3631, https://security.gentoo.org/glsa/202210-06, https://security.netapp.com/advisory/ntap-20220331-0010/, https://bugzilla.redhat.com/show_bug.cgi?id=1977726, https://gitlab.com/libvirt/libvirt/-/commit/15073504dbb624d3f6c911e85557019d3620fdb2, https://gitlab.com/libvirt/libvirt/-/issues/153

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -03eadc86fc5cdadbc4ab18123d820b6e4e321abd

    Affected versions

    CVE-2021-3631

    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
    CVE-2021-3631 | CVE-DB