How severe is CVE-2015-3241?

No CVSS score has been assigned to CVE-2015-3241 yet. Review the advisory details and affected package list to assess your exposure.

Which packages are affected by CVE-2015-3241?

CVE-2015-3241 affects the following packages: nova (PyPI). Ecosystems affected: PyPI.

How do I fix CVE-2015-3241?

Update nova to 112.0.0.0b3 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2015-3241 is resolved across your whole dependency graph.

How do I detect CVE-2015-3241 in my PyPI dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for nova, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

How do I mitigate CVE-2015-3241 if there is no patch (or I can't update yet)?

Cap what an attacker can consume: apply request size, rate and timeout limits in front of the affected component, and run it with memory and CPU limits so exhaustion degrades one worker rather than the whole service.

Is CVE-2015-3241 actively exploited in the wild?

No public exploit code has been indexed for CVE-2015-3241 yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

What is the EPSS score for CVE-2015-3241?

CVE-2015-3241 has an EPSS (Exploit Prediction Scoring System) score of 3.5%, placing it in the 89th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score indicates relatively lower exploitation probability, though the CVSS severity should still guide your patching priority.

What type of vulnerability is CVE-2015-3241?

CVE-2015-3241 is classified as CWE-399 (CWE-399). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation.

When was CVE-2015-3241 published, and has it been updated?

CVE-2015-3241 was published on September 8, 2015 and was last updated on July 7, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

🐍 PyPI

Not in CISA KEV

CVE-2015-3241 — nova

Fix: openstack/nova@7ab75d5

CVE-2015-3241 is a CWE-399 vulnerability in nova. A fix is available for nova — see the affected versions and patch details below.

OpenStack Nova instance migration process does not stop when instance is deleted

Also known asGHSA-3vx7-xff6-h2vxPYSEC-2026-861

Published

Sep 8, 2015

Updated

Jul 7, 2026

Affected

1 pkg

Patched

1 / 1

Exploits

None indexed

Exploitation data as of Oct 28, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗

3.5%probability of exploitation in next 30 days

Lower Risk0.00%

Lower risk than most CVEs89th percentile — riskier than 89% of all scored CVEsHighest risk

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

Real-World Exposure

1 pkg affected

🐍nova

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects PyPI packages — download data is not available via public APIs for these ecosystems.

Description

OpenStack Compute (nova) 2015.1 through 2015.1.1, 2014.2.3, and earlier does not stop the migration process when the instance is deleted, which allows remote authenticated users to cause a denial of service (disk, network, and other resource consumption) by resizing and then deleting an instance.

Affected Packages

1 total 1 fixed

Ecosystem	Package	Vulnerable range	Fix
🐍PyPI	`nova`	all versions	112.0.0.0b3`pip install --upgrade 'nova==112.0.0.0b3'`

Affected Products

1 product · 2 configurations

Application

novaopenstack

≥ 2015.1.0 && ≤ 2015.1.1

range

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for nova, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update nova to 112.0.0.0b3 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2015-3241 is resolved across your whole dependency graph.
Workarounds
Cap what an attacker can consume: apply request size, rate and timeout limits in front of the affected component, and run it with memory and CPU limits so exhaustion degrades one worker rather than the whole service.

Fixing This On Your OS

If you run this on a Linux distribution, patch through your package manager against the distro's own security advisory below — it tracks the exact backported fix for your release, which can ship on a different timeline (and sometimes a different severity) than the upstream project.

Red HatModerate

Product	Fixed in	Advisory
Red Hat Enterprise Linux OpenStack Platform 5.0 (Icehouse) for RHEL 6	`openstack-nova-0:2014.1.5-3.el6ost`	RHSA-2015:1898
Red Hat Enterprise Linux OpenStack Platform 7.0 (Kilo) for RHEL 7	`openstack-nova-0:2015.1.0-18.el7ost`	RHSA-2015:1723

Ubuntu

USN-3449-1Ubuntu

Frequently Asked Questions

O3 Security · Impact-Aware SCA

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