CVE-2013-6437

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.

Published: 2014-03-06 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2013-6437 is rated Moderate Risk (45/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 2.02%). EPSS rose +1.59% over the last day, indicating growing attacker interest. Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2013-6437

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.43% 2.02% +1.59%
2 2025-03-30 1.25% 0.43% -0.81%
3 2025-03-29 — 1.25% —

Full EPSS history (8 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2013-6437

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
4.0 2.0 MEDIUM
AV:N/AC:L/Au:S/C:N/I:N/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:S)
A single authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 8.0 2.9 [email protected]

Weakness enumeration for CVE-2013-6437

GitHub Security Advisory for CVE-2013-6437

GHSA-hrv9-4x4c-9jc8 · Severity: medium · Ecosystem: pip — OpenStack Nova DoS through ephemeral disk backing files

OS Trackers for CVE-2013-6437

vendor priority summary link
debian not yet assigned CVE-2013-6437 not yet assigned priority: Debian including 1 source packages (nova), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2013-6437
redhat medium — https://access.redhat.com/security/cve/CVE-2013-6437
ubuntu medium CVE-2013-6437 medium priority: Ubuntu including 1 source packages (nova), 6 status rows across 6 suites (lucid, precise, quantal, raring, saucy, upstream): not-affected 3, DNE 1, ignored 1, needs-triage 1. https://ubuntu.com/security/CVE-2013-6437

Affected software / configurations for CVE-2013-6437

Vendor Product Version Raw CPE
openstack nova >= 2013.1, < 2013.1.5 cpe:2.3:a:openstack:nova:*:*:*:*:*:*:*:*
openstack nova >= 2013.2, < 2013.2.2 cpe:2.3:a:openstack:nova:*:*:*:*:*:*:*:*
openstack nova 2014.1 cpe:2.3:a:openstack:nova:2014.1:milestone1:*:*:*:*:*:*

References for CVE-2013-6437

cvelogic Threat Intelligence