In OpenStack os-vif 1.15.x before 1.15.2, and 1.16.0, a hard-coded MAC aging time of 0…
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- High · None · High
- Fix status
- Partial Red Hat: 1 without a fix
Attack profile from CVSS 3.0 · NVD. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-770.
Summary
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.
Why it matters now
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
| — | os-vif (PyPI) | 1.15.0 to before 1.15.2 | 1.15.2 | Patch available | GHSA-mcpw-cp35-p3h8 |
| — | os-vif (PyPI) | 1.16.0 to before 1.17.0 | 1.17.0 | Patch available | GHSA-mcpw-cp35-p3h8 |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
- os-vif (PyPI) Vendor— Affected 1.15.0 to before 1.15.2 Fixed in 1.15.2 Patch available GHSA-mcpw-cp35-p3h8
- os-vif (PyPI) Vendor— Affected 1.16.0 to before 1.17.0 Fixed in 1.17.0 Patch available GHSA-mcpw-cp35-p3h8
Remediation
- Fix · GHSA-mcpw-cp35-p3h8 os-vif (PyPI) Fixed in 1.15.2 Advisory →
- Fix · GHSA-mcpw-cp35-p3h8 os-vif (PyPI) Fixed in 1.17.0 Advisory →
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat OpenStack Platform 15 (Stein) | Affected | No fix planned: Will not fix |
Not affected: 3 products
- Red Hat OpenStack Platform 10 (Newton)
- Red Hat OpenStack Platform 13 (Queens)
- Red Hat OpenStack Platform 14 (Rocky)
Timeline
- 2026-10-02 Threatist record created from CVE-2019-15753
- 2026-10-03 Alias added: GHSA-mcpw-cp35-p3h8
References
Patch 4
Sources
- CVE-2019-15753 · CVE Program
- CVE-2019-15753 · NVD
- FIRST EPSS
- GHSA-mcpw-cp35-p3h8 · GitHub Advisory Database · CC BY 4.0
- CVE-2019-15753 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences