CVSS 3.0
5.9 mediumCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:NCVE-2017-7543
Medium (5.9). EPSS 1.8% chance of exploitation in the next 30 days. Fixed in neutron 10.0.2-1.1, 7.2.0-12.1, 8.3.0-11.1.
A race-condition flaw was discovered in openstack-neutron before 7.2.0-12.1, 8.x before 8.3.0-11.1, 9.x before 9.3.1-2.1, and 10.x before 10.0.2-1.1, where, following a minor overcloud update, neutron security groups were disabled. Specifically, the following were reset to 0: net.bridge.bridge-nf-call-ip6tables and net.bridge.bridge-nf-call-iptables. The race was only triggered by an update, at which point an attacker could access exposed tenant VMs and network resources.
Severity
- EPSS
- 1.8% chance of exploitation in the next 30 days; higher than 78% of CVEs (scores of 2026-10-31)
- CWE
- CWE-362
- Published
- Modified
- Record from
- the NVD, synced
Affected
- openstack:neutron
- redhat:openstack
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-hvxr-2fvv-c3wq | PyPI | neutron | <7.2.0-12.1 | 7.2.0-12.1 |
| GHSA-hvxr-2fvv-c3wq | PyPI | neutron | >=8.0.0 <8.3.0-11.1 | 8.3.0-11.1 |
| GHSA-hvxr-2fvv-c3wq | PyPI | neutron | >=9.0.0 <9.3.1-2.1 | 9.3.1-2.1 |
| GHSA-hvxr-2fvv-c3wq | PyPI | neutron | >=10.0.0 <10.0.2-1.1 | 10.0.2-1.1 |
| PYSEC-2026-686 | PyPI | neutron | <7.2.0-12.1 >=8.0.0 <8.3.0-11.1 >=9.0.0 <9.3.1-2.1 >=10.0.0 <10.0.2-1.1 | 7.2.0-12.1, 8.3.0-11.1, 9.3.1-2.1, 10.0.2-1.1 |