openvswitch — security advisory
A flaw was found in openvswitch (OVS). When processing an IP packet with protocol 0, OVS will install the datapath flow without the action modifying the IP header. This issue results (for both kernel and userspace datapath) in installing a datapath flow matching all IP protocols (nw_proto is wildcarded) for this flow, but with an incorrect action, possibly causing incorrect handling of other IP packets with a != 0 IP protocol that matches this dp flow.
- Products
- openvswitch
- Affected versions
- Not specified
- Fixed versions
- 3.1.0-2
- CVEs
- CVE-2023-1668
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 15:22 UTC · Revision 1
Source evidence
A flaw was found in openvswitch (OVS). When processing an IP packet with protocol 0, OVS will install the datapath flow without the action modifying the IP header. This issue results (for both kernel and userspace datapath) in installing a datapath flow matching all IP protocols (nw_proto is wildcarded) for this flow, but with an incorrect action, possibly causing incorrect handling of other IP packets with a != 0 IP protocol that matches this dp flow.
osv:DEBIAN-CVE-2023-1668
openvswitch
Fixed versions: 3.1.0-2
openvswitch
Fixed versions: 3.1.0-2
openvswitch
Fixed versions: 3.1.0-2
Complete source record
{
"id": "cdd0c6d204a6c810455c5a22aa8ce12eb9aac5cb8f0a15671a3731e72e74cb0c",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2023-1668",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2023-1668",
"summary": "A flaw was found in openvswitch (OVS). When processing an IP packet with protocol 0, OVS will install the datapath flow without the action modifying the IP header. This issue results (for both kernel and userspace datapath) in installing a datapath flow matching all IP protocols (nw_proto is wildcarded) for this flow, but with an incorrect action, possibly causing incorrect handling of other IP packets with a != 0 IP protocol that matches this dp flow.",
"evidence": "osv:DEBIAN-CVE-2023-1668",
"products": [
{
"name": {
"value": "openvswitch",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "3.1.0-2",
"evidence": "/affected/0/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "openvswitch",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "3.1.0-2",
"evidence": "/affected/1/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "openvswitch",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "3.1.0-2",
"evidence": "/affected/2/ranges"
}
],
"affected_versions": []
}
],
"severity": "high",
"structured": {
"id": "DEBIAN-CVE-2023-1668",
"aliases": [
"DEBIAN-CVE-2023-1668"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "3.1.0-2"
}
]
}
],
"package": {
"name": "openvswitch",
"purl": "pkg:deb/debian/openvswitch?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2023-1668.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "3.1.0-2"
}
]
}
],
"package": {
"name": "openvswitch",
"purl": "pkg:deb/debian/openvswitch?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2023-1668.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "3.1.0-2"
}
]
}
],
"package": {
"name": "openvswitch",
"purl": "pkg:deb/debian/openvswitch?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2023-1668.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
],
"modified": "2026-10-26T18:00:24.260493452Z",
"provider": "osv",
"upstream": [
"CVE-2023-1668"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2023-1668"
]
},
"related_cves": [
{
"value": "CVE-2023-1668",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 454998,
"published_at": "2023-04-10T22:15:09.133+00:00"
}