Medium
kamailio — security advisory
A vulnerability has been found in Kamailio 5.5. This affects the function yyerror_at of the file src/core/cfg.y of the component Grammar Rule Handler. Such manipulation leads to null pointer dereference. The attack needs to be performed locally. The exploit has been disclosed to the public and may be used. The actual existence of this vulnerability is currently in question. This attack requires manipulating config files which might not be a realistic scenario in many cases. The vendor was contacted early about this disclosure but did not respond in any way.
- Products
- kamailio
- Affected versions
- 5.6.3-2, 5.6.4-1, 5.7.0-1, 5.7.2-1, 5.7.3-1, 5.7.4-1, 5.8.2-2, 5.8.2-3, 5.8.2-4, 5.8.3-1, 5.8.4-1, 5.8.5-1, 6.0.0-1, 6.0.1-1, 6.0.1-1+deb13u1, 6.0.1-1+deb13u2, 6.0.2-1, 6.0.2-2, 6.0.2-3, 6.0.3-1, 6.0.3-2, 6.0.3-3, 6.0.4-1, 6.0.5-1, 6.1.1-2, 6.1.1-2.1, 6.1.2-1, 6.1.3-1, 6.1.3-2, 6.1.4-1, 6.1.5-1
- Fixed versions
- Not specified
- CVEs
- CVE-2025-12207
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 01:16 UTC · Revision 1
Source evidence
A vulnerability has been found in Kamailio 5.5. This affects the function yyerror_at of the file src/core/cfg.y of the component Grammar Rule Handler. Such manipulation leads to null pointer dereference. The attack needs to be performed locally. The exploit has been disclosed to the public and may be used. The actual existence of this vulnerability is currently in question. This attack requires manipulating config files which might not be a realistic scenario in many cases. The vendor was contacted early about this disclosure but did not respond in any way.
osv:DEBIAN-CVE-2025-12207
kamailio
Fixed versions: Not specified
kamailio
Fixed versions: Not specified
kamailio
Fixed versions: Not specified
Complete source record
{
"id": "a8d17ecd7a9328039f5821dd367aec5c5c9733938ceb4c059d2be3fcf81f66a6",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2025-12207",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2025-12207",
"summary": "A vulnerability has been found in Kamailio 5.5. This affects the function yyerror_at of the file src/core/cfg.y of the component Grammar Rule Handler. Such manipulation leads to null pointer dereference. The attack needs to be performed locally. The exploit has been disclosed to the public and may be used. The actual existence of this vulnerability is currently in question. This attack requires manipulating config files which might not be a realistic scenario in many cases. The vendor was contacted early about this disclosure but did not respond in any way.",
"evidence": "osv:DEBIAN-CVE-2025-12207",
"products": [
{
"name": {
"value": "kamailio",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "5.6.3-2",
"evidence": "/affected/0/versions"
},
{
"value": "5.6.4-1",
"evidence": "/affected/0/versions"
},
{
"value": "5.7.0-1",
"evidence": "/affected/0/versions"
},
{
"value": "5.7.2-1",
"evidence": "/affected/0/versions"
},
{
"value": "5.7.3-1",
"evidence": "/affected/0/versions"
},
{
"value": "5.7.4-1",
"evidence": "/affected/0/versions"
},
{
"value": "5.8.2-2",
"evidence": "/affected/0/versions"
},
{
"value": "5.8.2-3",
"evidence": "/affected/0/versions"
},
{
"value": "5.8.2-4",
"evidence": "/affected/0/versions"
},
{
"value": "5.8.3-1",
"evidence": "/affected/0/versions"
},
{
"value": "5.8.4-1",
"evidence": "/affected/0/versions"
},
{
"value": "5.8.5-1",
"evidence": "/affected/0/versions"
},
{
"value": "6.0.0-1",
"evidence": "/affected/0/versions"
},
{
"value": "6.0.1-1",
"evidence": "/affected/0/versions"
},
{
"value": "6.0.2-1",
"evidence": "/affected/0/versions"
},
{
"value": "6.0.2-2",
"evidence": "/affected/0/versions"
},
{
"value": "6.0.2-3",
"evidence": "/affected/0/versions"
},
{
"value": "6.0.3-1",
"evidence": "/affected/0/versions"
},
{
"value": "6.0.3-2",
"evidence": "/affected/0/versions"
},
{
"value": "6.0.3-3",
"evidence": "/affected/0/versions"
},
{
"value": "6.0.4-1",
"evidence": "/affected/0/versions"
},
{
"value": "6.0.5-1",
"evidence": "/affected/0/versions"
},
{
"value": "6.1.1-2",
"evidence": "/affected/0/versions"
},
{
"value": "6.1.1-2.1",
"evidence": "/affected/0/versions"
},
{
"value": "6.1.2-1",
"evidence": "/affected/0/versions"
},
{
"value": "6.1.3-1",
"evidence": "/affected/0/versions"
},
{
"value": "6.1.3-2",
"evidence": "/affected/0/versions"
},
{
"value": "6.1.4-1",
"evidence": "/affected/0/versions"
},
{
"value": "6.1.5-1",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "kamailio",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "6.0.1-1",
"evidence": "/affected/1/versions"
},
{
"value": "6.0.1-1+deb13u1",
"evidence": "/affected/1/versions"
},
{
"value": "6.0.1-1+deb13u2",
"evidence": "/affected/1/versions"
},
{
"value": "6.0.2-1",
"evidence": "/affected/1/versions"
},
{
"value": "6.0.2-2",
"evidence": "/affected/1/versions"
},
{
"value": "6.0.2-3",
"evidence": "/affected/1/versions"
},
{
"value": "6.0.3-1",
"evidence": "/affected/1/versions"
},
{
"value": "6.0.3-2",
"evidence": "/affected/1/versions"
},
{
"value": "6.0.3-3",
"evidence": "/affected/1/versions"
},
{
"value": "6.0.4-1",
"evidence": "/affected/1/versions"
},
{
"value": "6.0.5-1",
"evidence": "/affected/1/versions"
},
{
"value": "6.1.1-2",
"evidence": "/affected/1/versions"
},
{
"value": "6.1.1-2.1",
"evidence": "/affected/1/versions"
},
{
"value": "6.1.2-1",
"evidence": "/affected/1/versions"
},
{
"value": "6.1.3-1",
"evidence": "/affected/1/versions"
},
{
"value": "6.1.3-2",
"evidence": "/affected/1/versions"
},
{
"value": "6.1.4-1",
"evidence": "/affected/1/versions"
},
{
"value": "6.1.5-1",
"evidence": "/affected/1/versions"
}
]
},
{
"name": {
"value": "kamailio",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "6.0.1-1",
"evidence": "/affected/2/versions"
},
{
"value": "6.0.2-1",
"evidence": "/affected/2/versions"
},
{
"value": "6.0.2-2",
"evidence": "/affected/2/versions"
},
{
"value": "6.0.2-3",
"evidence": "/affected/2/versions"
},
{
"value": "6.0.3-1",
"evidence": "/affected/2/versions"
},
{
"value": "6.0.3-2",
"evidence": "/affected/2/versions"
},
{
"value": "6.0.3-3",
"evidence": "/affected/2/versions"
},
{
"value": "6.0.4-1",
"evidence": "/affected/2/versions"
},
{
"value": "6.0.5-1",
"evidence": "/affected/2/versions"
},
{
"value": "6.1.1-2",
"evidence": "/affected/2/versions"
},
{
"value": "6.1.1-2.1",
"evidence": "/affected/2/versions"
},
{
"value": "6.1.2-1",
"evidence": "/affected/2/versions"
},
{
"value": "6.1.3-1",
"evidence": "/affected/2/versions"
},
{
"value": "6.1.3-2",
"evidence": "/affected/2/versions"
},
{
"value": "6.1.4-1",
"evidence": "/affected/2/versions"
},
{
"value": "6.1.5-1",
"evidence": "/affected/2/versions"
}
]
}
],
"severity": "medium",
"structured": {
"id": "DEBIAN-CVE-2025-12207",
"aliases": [
"DEBIAN-CVE-2025-12207"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "kamailio",
"purl": "pkg:deb/debian/kamailio?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"5.6.3-2",
"5.6.4-1",
"5.7.0-1",
"5.7.2-1",
"5.7.3-1",
"5.7.4-1",
"5.8.2-2",
"5.8.2-3",
"5.8.2-4",
"5.8.3-1",
"5.8.4-1",
"5.8.5-1",
"6.0.0-1",
"6.0.1-1",
"6.0.2-1",
"6.0.2-2",
"6.0.2-3",
"6.0.3-1",
"6.0.3-2",
"6.0.3-3",
"6.0.4-1",
"6.0.5-1",
"6.1.1-2",
"6.1.1-2.1",
"6.1.2-1",
"6.1.3-1",
"6.1.3-2",
"6.1.4-1",
"6.1.5-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2025-12207.json"
},
"ecosystem_specific": {
"urgency": "unimportant"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "kamailio",
"purl": "pkg:deb/debian/kamailio?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"6.0.1-1",
"6.0.1-1+deb13u1",
"6.0.1-1+deb13u2",
"6.0.2-1",
"6.0.2-2",
"6.0.2-3",
"6.0.3-1",
"6.0.3-2",
"6.0.3-3",
"6.0.4-1",
"6.0.5-1",
"6.1.1-2",
"6.1.1-2.1",
"6.1.2-1",
"6.1.3-1",
"6.1.3-2",
"6.1.4-1",
"6.1.5-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2025-12207.json"
},
"ecosystem_specific": {
"urgency": "unimportant"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "kamailio",
"purl": "pkg:deb/debian/kamailio?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"6.0.1-1",
"6.0.2-1",
"6.0.2-2",
"6.0.2-3",
"6.0.3-1",
"6.0.3-2",
"6.0.3-3",
"6.0.4-1",
"6.0.5-1",
"6.1.1-2",
"6.1.1-2.1",
"6.1.2-1",
"6.1.3-1",
"6.1.3-2",
"6.1.4-1",
"6.1.5-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2025-12207.json"
},
"ecosystem_specific": {
"urgency": "unimportant"
}
}
],
"modified": "2026-10-23T18:04:33.432510877Z",
"provider": "osv",
"upstream": [
"CVE-2025-12207"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2025-12207"
]
},
"related_cves": [
{
"value": "CVE-2025-12207",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 423580,
"published_at": "2025-10-27T03:15:49.937+00:00"
}