High
kamailio — security advisory
A vulnerability was detected in Kamailio 5.5. The affected element is the function sr_push_yy_state of the file src/core/cfg.lex of the component Configuration File Handler. The manipulation results in use after free. The attack must be initiated from a local position. The exploit is now public and may be used. The real existence of this vulnerability is still doubted at the moment. 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-2025-12205
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 01:16 UTC · Revision 1
Source evidence
A vulnerability was detected in Kamailio 5.5. The affected element is the function sr_push_yy_state of the file src/core/cfg.lex of the component Configuration File Handler. The manipulation results in use after free. The attack must be initiated from a local position. The exploit is now public and may be used. The real existence of this vulnerability is still doubted at the moment. 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-2025-12205
kamailio
Fixed versions: Not specified
kamailio
Fixed versions: Not specified
kamailio
Fixed versions: Not specified
Complete source record
{
"id": "58f14dcd64925501438cc5383c302146c5807c515ead50ed599cdb89383b2c03",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2025-12205",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2025-12205",
"summary": "A vulnerability was detected in Kamailio 5.5. The affected element is the function sr_push_yy_state of the file src/core/cfg.lex of the component Configuration File Handler. The manipulation results in use after free. The attack must be initiated from a local position. The exploit is now public and may be used. The real existence of this vulnerability is still doubted at the moment. 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-2025-12205",
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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"evidence": "/affected/2/versions"
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{
"value": "6.1.1-2",
"evidence": "/affected/2/versions"
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{
"value": "6.1.1-2.1",
"evidence": "/affected/2/versions"
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{
"value": "6.1.2-1",
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{
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{
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{
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{
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"severity": "high",
"structured": {
"id": "DEBIAN-CVE-2025-12205",
"aliases": [
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],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
}
],
"affected": [
{
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"type": "ECOSYSTEM",
"events": [
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"package": {
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"purl": "pkg:deb/debian/kamailio?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
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"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-2025-12205.json"
},
"ecosystem_specific": {
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}
},
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"purl": "pkg:deb/debian/kamailio?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
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"6.0.2-3",
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"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"
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"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2025-12205.json"
},
"ecosystem_specific": {
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},
{
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],
"package": {
"name": "kamailio",
"purl": "pkg:deb/debian/kamailio?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
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},
"ecosystem_specific": {
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}
}
],
"modified": "2026-10-23T18:04:33.289406116Z",
"provider": "osv",
"upstream": [
"CVE-2025-12205"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2025-12205"
]
},
"related_cves": [
{
"value": "CVE-2025-12205",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 423573,
"published_at": "2025-10-27T03:15:49.56+00:00"
}