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CVE-2019-15753
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…
Critical9.1EPSS 2.6%
- Published
- Updated
- Reserved
- Assigned by
- mitre
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.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.0 | Critical9.1 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H |
- EPSS (exploitation in 30 days)
- 2.6% · top 15% of all CVEs (6 Nov 2026)
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The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.1.
Weakness
Affected products
n/a
- affected n/a
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- PyPIos-vifGHSA-mcpw-cp35-p3h8 (opens in a new tab)
References (5)
- https://launchpad.net/bugs/1837252 (opens in a new tab)x_refsource_MISCx_transferred
- https://review.opendev.org/672834 (opens in a new tab)x_refsource_MISCx_transferred
- https://review.opendev.org/678098 (opens in a new tab)x_refsource_MISCx_transferred
- https://security.openstack.org/ossa/OSSA-2019-004.html (opens in a new tab)x_refsource_CONFIRMx_transferred
- [oss-security] 20190829 [OSSA-2019-004] Ageing time of 0 disables linuxbridge MAC learning (CVE-2019-15753) (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-mcpw-cp35-p3h8 (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2019-15753)Record last updated .