PYSEC-2026-874

    Dashboard / Vulnerabilities / PYSEC-2026-874

    PYSEC-2026-874

    Published: 6 Jul 2026Last Modified: 7 Jul 2026

    Summary: OpenStack Nova DoS through ephemeral disk backing files

    Details: The libvirt driver in OpenStack Compute (Nova) before 2013.2.2 and icehouse before icehouse-2 allows remote authenticated users to cause a denial of service (disk consumption) by creating and deleting instances with unique os_type settings, which triggers the creation of a new ephemeral disk backing file.

    References: https://nvd.nist.gov/vuln/detail/CVE-2013-6437, https://github.com/openstack/nova/commit/3e451f1bac57d24e47171cffb3ad59bb1610d836, https://github.com/openstack/nova/commit/6e455cd97f04bf26bbe022be17c57e089cf502f4, https://github.com/openstack/nova/commit/ca38774ebcf5b67d16c202c8f218c0c433973ca9, https://bugs.launchpad.net/nova/+bug/1253980, https://github.com/openstack/nova, http://lists.openstack.org/pipermail/openstack-announce/2013-December/000179.html, http://rhn.redhat.com/errata/RHSA-2014-0231.html, https://pypi.org/project/nova, https://github.com/advisories/GHSA-hrv9-4x4c-9jc8

    Affected packages

    Package

    Name: nova

    Purl: pkg:pypi/nova

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -12.0.0a0

    Affected versions

    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
    PYSEC-2026-874 | CVE-DB