nova — security advisory
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.
- Products
- nova
- Affected versions
- Not specified
- Fixed versions
- 2:26.0.0~rc1-3
- CVEs
- CVE-2022-37394
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 30 Oct 2026, 14:51 UTC · Revision 1
Source evidence
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.
osv:DEBIAN-CVE-2022-37394
nova
Fixed versions: 2:26.0.0~rc1-3
nova
Fixed versions: 2:26.0.0~rc1-3
nova
Fixed versions: 2:26.0.0~rc1-3
Complete source record
{
"id": "51efe951866f2f34e564111e9b5f32c9304e68df27f6a174093db222622d3e6b",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2022-37394",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2022-37394",
"summary": "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.",
"evidence": "osv:DEBIAN-CVE-2022-37394",
"products": [
{
"name": {
"value": "nova",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2:26.0.0~rc1-3",
"evidence": "/affected/0/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "nova",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2:26.0.0~rc1-3",
"evidence": "/affected/1/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "nova",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2:26.0.0~rc1-3",
"evidence": "/affected/2/ranges"
}
],
"affected_versions": []
}
],
"severity": "low",
"structured": {
"id": "DEBIAN-CVE-2022-37394",
"aliases": [
"DEBIAN-CVE-2022-37394"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2:26.0.0~rc1-3"
}
]
}
],
"package": {
"name": "nova",
"purl": "pkg:deb/debian/nova?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2022-37394.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2:26.0.0~rc1-3"
}
]
}
],
"package": {
"name": "nova",
"purl": "pkg:deb/debian/nova?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2022-37394.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2:26.0.0~rc1-3"
}
]
}
],
"package": {
"name": "nova",
"purl": "pkg:deb/debian/nova?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2022-37394.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
],
"modified": "2026-10-15T08:02:31.971122624Z",
"provider": "osv",
"upstream": [
"CVE-2022-37394"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2022-37394"
]
},
"related_cves": [
{
"value": "CVE-2022-37394",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 323536,
"published_at": "2022-08-03T07:15:07.757+00:00"
}