{"id":"CVE-2013-6437","aliases":["GHSA-hrv9-4x4c-9jc8","PYSEC-2026-874"],"title":"OpenStack Nova DoS through ephemeral disk backing files","summary":"OpenStack Nova DoS through ephemeral disk backing files","severity":"medium","vendor":"nova","product":"nova","ecosystem":"pip","affected":["nova < 12.0.0a0"],"patched":["nova 12.0.0a0"],"published":"2022-05-14","updated":"2026-07-07","source":"OSV","sourceUrl":"https://osv.dev/vulnerability/GHSA-hrv9-4x4c-9jc8","references":[{"url":"https://nvd.nist.gov/vuln/detail/CVE-2013-6437"},{"url":"https://github.com/openstack/nova/commit/3e451f1bac57d24e47171cffb3ad59bb1610d836"},{"url":"https://github.com/openstack/nova/commit/6e455cd97f04bf26bbe022be17c57e089cf502f4"},{"url":"https://github.com/openstack/nova/commit/ca38774ebcf5b67d16c202c8f218c0c433973ca9"},{"url":"https://bugs.launchpad.net/nova/+bug/1253980"},{"url":"https://github.com/openstack/nova"},{"url":"http://lists.openstack.org/pipermail/openstack-announce/2013-December/000179.html"},{"url":"http://rhn.redhat.com/errata/RHSA-2014-0231.html"}],"tags":["osv","pip"],"epss":0.02037,"epssPercentile":0.79977,"ingestedAt":"2026-07-08T18:25:50.317Z","slug":"CVE-2013-6437","body":"## Overview\n\nThe 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.\n\n## Affected packages\n\n- `nova < 12.0.0a0`\n\n## Remediation\n\nUpgrade to a patched release:\n\n- `nova 12.0.0a0`","depth":"sunlit","depthScore":28,"depthScoreParts":{"impact":27.5,"likelihood":0.4,"exploitation":0,"ransomware":0},"changes":[]}