CriticalFix available
frr — security advisory
bgpd/bgp_flowspec.c in FRRouting (FRR) before 8.4.3 mishandles an nlri length of zero, aka a "flowspec overflow."
- Products
- frr
- Affected versions
- 8.4.2-1, 8.4.4-1
- Fixed versions
- 8.4.4-1, 8.4.4-1.1~deb12u1
- CVEs
- CVE-2023-38406
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 16:24 UTC · Revision 1
Source evidence
bgpd/bgp_flowspec.c in FRRouting (FRR) before 8.4.3 mishandles an nlri length of zero, aka a "flowspec overflow."
osv:DEBIAN-CVE-2023-38406
frr
Fixed versions: 8.4.4-1.1~deb12u1
frr
Fixed versions: 8.4.4-1
frr
Fixed versions: 8.4.4-1
Complete source record
{
"id": "717d0661fe078d999a1b8496b7622cfe8ab24459cbb384aeabdda1410e853c1f",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2023-38406",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2023-38406",
"summary": "bgpd/bgp_flowspec.c in FRRouting (FRR) before 8.4.3 mishandles an nlri length of zero, aka a \"flowspec overflow.\"",
"evidence": "osv:DEBIAN-CVE-2023-38406",
"products": [
{
"name": {
"value": "frr",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "8.4.4-1.1~deb12u1",
"evidence": "/affected/0/ranges"
}
],
"affected_versions": [
{
"value": "8.4.2-1",
"evidence": "/affected/0/versions"
},
{
"value": "8.4.4-1",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "frr",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "8.4.4-1",
"evidence": "/affected/1/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "frr",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "8.4.4-1",
"evidence": "/affected/2/ranges"
}
],
"affected_versions": []
}
],
"severity": "critical",
"structured": {
"id": "DEBIAN-CVE-2023-38406",
"aliases": [
"DEBIAN-CVE-2023-38406"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "8.4.4-1.1~deb12u1"
}
]
}
],
"package": {
"name": "frr",
"purl": "pkg:deb/debian/frr?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"8.4.2-1",
"8.4.4-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2023-38406.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "8.4.4-1"
}
]
}
],
"package": {
"name": "frr",
"purl": "pkg:deb/debian/frr?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2023-38406.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "8.4.4-1"
}
]
}
],
"package": {
"name": "frr",
"purl": "pkg:deb/debian/frr?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2023-38406.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
],
"modified": "2026-10-26T18:03:06.037728853Z",
"provider": "osv",
"upstream": [
"CVE-2023-38406"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2023-38406"
]
},
"related_cves": [
{
"value": "CVE-2023-38406",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 457621,
"published_at": "2023-11-06T06:15:40.85+00:00"
}