How severe is CVE-2015-3221?

CVE-2015-3221 has a CVSS 2.0 base score of 4.0, rated medium severity.

Is CVE-2015-3221 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 11% (95th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2015-3221?

CVE-2015-3221 affects Openstack Neutron. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2015-3221?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2015-3221 published?

CVE-2015-3221 was published on 2015-08-26 and last updated on 2026-06-17.

CVE-2015-3221

CVE-2015-3221 is a medium-severity vulnerability in Openstack Neutron with a CVSS 2.0 base score of 4.0. Its EPSS exploit-prediction score of 11% places it in the 95th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-20.

Key facts

Severity: Medium (CVSS 2.0 base score 4.0)
EPSS exploit prediction: 11% (95th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Openstack Neutron
Published: 2015-08-26
Last modified: 2026-06-17

Description

OpenStack Neutron before 2014.2.4 (juno) and 2015.1.x before 2015.1.1 (kilo), when using the IPTables firewall driver, allows remote authenticated users to cause a denial of service (L2 agent crash) by adding an address pair that is rejected by the ipset tool.

Frequently asked questions

What is CVE-2015-3221?: OpenStack Neutron before 2014.2.4 (juno) and 2015.1.x before 2015.1.1 (kilo), when using the IPTables firewall driver, allows remote authenticated users to cause a denial of service (L2 agent crash) by adding an address pair that is rejected by the ipset tool.
How severe is CVE-2015-3221?: CVE-2015-3221 has a CVSS 2.0 base score of 4.0, rated medium severity.
Is CVE-2015-3221 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 11% (95th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2015-3221?: CVE-2015-3221 affects Openstack Neutron. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2015-3221?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2015-3221 published?: CVE-2015-3221 was published on 2015-08-26 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:openstack:neutron:*:*:*:*:*:*:*:*

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