neutron: In OpenStack Neutron before 28.0.1, a project manager can create or update a port on a shared network owned by anothe...
CVE-2026-50266 is fixed in neutron on 1 platform, first by DEBIAN-CVE-2026-50266, released June 24, 2026. It is not reported as exploited. Patch Radar priority: Routine.
In OpenStack Neutron before 28.0.1, a project manager can create or update a port on a shared network owned by another project and set device_owner to a value that has "network:" at the beginning ("network:dhcp" for example). The default port RBAC policies incorrectly included PROJECT_MANAGER without requiring network ownership, allowing any project manager to obtain trusted network-service port behavior on shared networks. Depending on backend and deployment, this can bypass anti-spoofing and security group protections, enabling DHCP, MAC, or IP spoofing against other tenants on the shared network. This is a regression of CVE-2015-5240 (OSSA-2015-018).
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| neutron · Debian 13.5 (trixie) | 2:26.0.3-0+deb13u2 | DEBIAN-CVE-2026-50266 | Jun 24, 2026 |
| neutron · Debian 14 | 2:28.0.0-7 | DEBIAN-CVE-2026-50266 | Jun 24, 2026 |
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