{"id":"CVE-2022-37394","aliases":["GHSA-v725-c588-h936","PYSEC-2026-882"],"url":"https://o3.security/vulnerability/CVE-2022-37394","summary":"OpenStack Nova Changing vnic_type breaks compute service restart","details":"An 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.","published":"2022-08-03T06:43:44Z","modified":"2026-08-12T03:51:16.169536197Z","cvss":{"score":3.3,"severity":"LOW","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L"},"epss":{"score":0.00309,"percentile":0.2366,"asOf":"2026-09-16"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"PyPI","name":"nova","fixedVersion":"23.2.2"},{"ecosystem":"PyPI","name":"nova","fixedVersion":"24.1.2"},{"ecosystem":"PyPI","name":"nova","fixedVersion":"25.0.2"}],"fix":{"url":"https://github.com/openstack/nova/commit/0c87681135cfb3ce61d2a0392928c1dbc1fe5fde","label":"openstack/nova@0c87681"},"references":[{"type":"WEB","url":"https://bugs.launchpad.net/ossa/+bug/1981813"},{"type":"WEB","url":"https://review.opendev.org/c/openstack/nova/+/849985"},{"type":"WEB","url":"https://review.opendev.org/c/openstack/nova/+/850003"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/37xxx/CVE-2022-37394.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2022-37394"},{"type":"WEB","url":"https://github.com/openstack/nova/commit/0c87681135cfb3ce61d2a0392928c1dbc1fe5fde"},{"type":"WEB","url":"https://github.com/openstack/nova/commit/1a98a1a650d065a8ab3e1c474f3b9fd537dc2206"},{"type":"WEB","url":"https://github.com/openstack/nova/commit/4954f993680c75fd9d3d507f2dcd00300c9b3d44"},{"type":"WEB","url":"https://github.com/openstack/nova/commit/a28c82719545d5c8ee7f3ff1361b3a796e05095a"},{"type":"WEB","url":"https://github.com/openstack/nova/commit/e43bf900dc8ca66578603bed333c56b215b1876e"},{"type":"WEB","url":"https://github.com/openstack/nova/commit/f8c91eb75fc5504a37fc3b4be1d65d33dbc9b511"},{"type":"PACKAGE","url":"https://github.com/openstack/nova"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:16.169536197Z"}}