DEBIAN-CVE-2026-39863
Kamailio is an open source implementation of a SIP Signaling Server. Prior to 6.1.1, 6.0.6, and 5.8.8, an out-of-bounds access in the core of Kamailio (formerly OpenSER and SER) allows remote attackers to cause a denial of service (process crash) via a specially crafted data packet sent over TCP. The issue impacts Kamailio instances having TCP or TLS listeners. This vulnerability is fixed in 5.1.1, 6.0.6, and 5.8.8.
DEBIAN-CVE-2026-39863
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: osv:DEBIAN-CVE-2026-39863
kamailio
Source reference: /affected/0/package/name
- Affected versions
- 5.6.3-2
Source reference:
/affected/0/versions5.6.4-1Source reference:
/affected/0/versions5.7.0-1Source reference:
/affected/0/versions5.7.2-1Source reference:
/affected/0/versions5.7.3-1Source reference:
/affected/0/versions5.7.4-1Source reference:
/affected/0/versions5.8.2-2Source reference:
/affected/0/versions5.8.2-3Source reference:
/affected/0/versions5.8.2-4Source reference:
/affected/0/versions5.8.3-1Source reference:
/affected/0/versions5.8.4-1Source reference:
/affected/0/versions5.8.5-1Source reference:
/affected/0/versions6.0.0-1Source reference:
/affected/0/versions6.0.1-1Source reference:
/affected/0/versions6.0.2-1Source reference:
/affected/0/versions6.0.2-2Source reference:
/affected/0/versions6.0.2-3Source reference:
/affected/0/versions6.0.3-1Source reference:
/affected/0/versions6.0.3-2Source reference:
/affected/0/versions6.0.3-3Source reference:
/affected/0/versions6.0.4-1Source reference:
/affected/0/versions6.0.5-1Source reference:
/affected/0/versions6.1.1-2Source reference:
/affected/0/versions6.1.1-2.1Source reference:
/affected/0/versions6.1.2-1Source reference:
/affected/0/versions6.1.3-1Source reference:
/affected/0/versions6.1.3-2Source reference:
/affected/0/versions6.1.4-1Source reference:
/affected/0/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
kamailio
Source reference: /affected/1/package/name
- Affected versions
- 6.0.1-1
Source reference:
/affected/1/versions6.0.1-1+deb13u1Source reference:
/affected/1/versions - Fixed versions
- 6.0.1-1+deb13u2
Source reference:
/affected/1/ranges - Prerequisites
- Not stated in this record
kamailio
Source reference: /affected/2/package/name
- Affected versions
- 6.0.1-1
Source reference:
/affected/2/versions6.0.2-1Source reference:
/affected/2/versions6.0.2-2Source reference:
/affected/2/versions6.0.2-3Source reference:
/affected/2/versions6.0.3-1Source reference:
/affected/2/versions6.0.3-2Source reference:
/affected/2/versions6.0.3-3Source reference:
/affected/2/versions6.0.4-1Source reference:
/affected/2/versions6.0.5-1Source reference:
/affected/2/versions - Fixed versions
- 6.1.1-2
Source reference:
/affected/2/ranges - Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"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"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-39863.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "6.0.1-1+deb13u2"
}
]
}
],
"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"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-39863.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "6.1.1-2"
}
]
}
],
"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"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-39863.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
]Publisher severity
No explicit severity was provided.
- Event
- #56941 · Revision 1
- Added to Heist Feed
- Publisher date