{"id":"CVE-2022-37394","aliases":["GHSA-v725-c588-h936","PYSEC-2026-882"],"title":"OpenStack Nova Changing vnic_type breaks compute service restart","summary":"OpenStack Nova Changing vnic_type breaks compute service restart","severity":"low","cvss":3.3,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L","vendor":"nova","product":"nova","ecosystem":"pip","affected":["nova < 23.2.2","nova >= 24.0.0, < 24.1.2","nova >= 25.0.0, < 25.0.2"],"patched":["nova 23.2.2","nova 24.1.2","nova 25.0.2"],"published":"2022-08-04","updated":"2026-07-07","source":"OSV","sourceUrl":"https://osv.dev/vulnerability/GHSA-v725-c588-h936","references":[{"url":"https://nvd.nist.gov/vuln/detail/CVE-2022-37394"},{"url":"https://github.com/openstack/nova/commit/0c87681135cfb3ce61d2a0392928c1dbc1fe5fde"},{"url":"https://github.com/openstack/nova/commit/1a98a1a650d065a8ab3e1c474f3b9fd537dc2206"},{"url":"https://github.com/openstack/nova/commit/4954f993680c75fd9d3d507f2dcd00300c9b3d44"},{"url":"https://github.com/openstack/nova/commit/a28c82719545d5c8ee7f3ff1361b3a796e05095a"},{"url":"https://github.com/openstack/nova/commit/e43bf900dc8ca66578603bed333c56b215b1876e"},{"url":"https://github.com/openstack/nova/commit/f8c91eb75fc5504a37fc3b4be1d65d33dbc9b511"},{"url":"https://bugs.launchpad.net/ossa/+bug/1981813"},{"url":"https://github.com/openstack/nova"},{"url":"https://review.opendev.org/c/openstack/nova/+/849985"},{"url":"https://review.opendev.org/c/openstack/nova/+/850003"}],"tags":["osv","pip"],"epss":0.00309,"epssPercentile":0.2382,"ingestedAt":"2026-07-08T18:25:53.111Z","slug":"CVE-2022-37394","body":"## Overview\n\nAn issue was discovered in OpenStack Nova before 23.2.2, 24.x before 24.1.2, and 25.x before 25.0.2. By creating a neutron port with the direct vnic_type, creating an instance bound to that port, and then changing the vnic_type of the bound port to macvtap, an authenticated user may cause the compute service to fail to restart, resulting in a possible denial of service. Only Nova deployments configured with SR-IOV are affected.\n\n## Affected packages\n\n- `nova < 23.2.2`\n- `nova >= 24.0.0, < 24.1.2`\n- `nova >= 25.0.0, < 25.0.2`\n\n## Remediation\n\nUpgrade to a patched release:\n\n- `nova 23.2.2`\n- `nova 24.1.2`\n- `nova 25.0.2`","depth":"sunlit","depthScore":18,"depthScoreParts":{"impact":18.2,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}