CVE-2019-15753

Name: CVE-2019-15753
Creator: NVD / NIST
Published: 2019-08-28T21:15:10.943+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 2.59%

Last modified Jun 17, 2026

CVE-2019-15753 is a vulnerability of currently unknown severity. In OpenStack os-vif 1.15.x before 1.15.2, and 1.16.0, a hard-coded MAC aging time of 0 disables MAC learning in linuxbridge, forcing obligatory Ethernet flooding of non-local destinations, which both impedes network performance and allows users to possibly view the content of packets for instances belonging to other tenants sharing the same network. Only deployments using the linuxbridge backend are affected. EPSS estimates a 2.59% chance of exploitation in the next 30 days.

Description

In OpenStack os-vif 1.15.x before 1.15.2, and 1.16.0, a hard-coded MAC aging time of 0 disables MAC learning in linuxbridge, forcing obligatory Ethernet flooding of non-local destinations, which both impedes network performance and allows users to possibly view the content of packets for instances belonging to other tenants sharing the same network. Only deployments using the linuxbridge backend are affected. This occurs in PyRoute2.add() in internal/command/ip/linux/impl_pyroute2.py.

Metrics

EPSS Probability

2.59%

83.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-770

Affected Software

Vendor	Product	Versions
Openstack	Os-Vif	>= 1.15.0, < 1.15.2
Openstack	Os-Vif	1.16.0

References

http://www.openwall.com/lists/oss-security/2019/08/29/2Mailing List, Patch, Third Party Advisory
https://launchpad.net/bugs/1837252Issue Tracking, Third Party Advisory
https://review.opendev.org/672834Patch
https://review.opendev.org/678098Patch
https://security.openstack.org/ossa/OSSA-2019-004.htmlPatch, Vendor Advisory
http://www.openwall.com/lists/oss-security/2019/08/29/2Mailing List, Patch, Third Party Advisory
https://launchpad.net/bugs/1837252Issue Tracking, Third Party Advisory
https://review.opendev.org/672834Patch
https://review.opendev.org/678098Patch
https://security.openstack.org/ossa/OSSA-2019-004.htmlPatch, Vendor Advisory

Timeline

Published: Aug 28, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-15753?

How severe is CVE-2019-15753?

Severity scoring for CVE-2019-15753 is pending analysis. The EPSS model estimates a 2.59% probability of exploitation in the next 30 days.

How do I fix CVE-2019-15753?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2019-15753?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST