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DEBIAN-CVE-2026-39863

Type: advisorySource: OSV1 source record

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.

Announced Group revision 1
Original source ↗

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/versions

5.6.4-1

Source reference: /affected/0/versions

5.7.0-1

Source reference: /affected/0/versions

5.7.2-1

Source reference: /affected/0/versions

5.7.3-1

Source reference: /affected/0/versions

5.7.4-1

Source reference: /affected/0/versions

5.8.2-2

Source reference: /affected/0/versions

5.8.2-3

Source reference: /affected/0/versions

5.8.2-4

Source reference: /affected/0/versions

5.8.3-1

Source reference: /affected/0/versions

5.8.4-1

Source reference: /affected/0/versions

5.8.5-1

Source reference: /affected/0/versions

6.0.0-1

Source reference: /affected/0/versions

6.0.1-1

Source reference: /affected/0/versions

6.0.2-1

Source reference: /affected/0/versions

6.0.2-2

Source reference: /affected/0/versions

6.0.2-3

Source reference: /affected/0/versions

6.0.3-1

Source reference: /affected/0/versions

6.0.3-2

Source reference: /affected/0/versions

6.0.3-3

Source reference: /affected/0/versions

6.0.4-1

Source reference: /affected/0/versions

6.0.5-1

Source reference: /affected/0/versions

6.1.1-2

Source reference: /affected/0/versions

6.1.1-2.1

Source reference: /affected/0/versions

6.1.2-1

Source reference: /affected/0/versions

6.1.3-1

Source reference: /affected/0/versions

6.1.3-2

Source reference: /affected/0/versions

6.1.4-1

Source 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/versions

6.0.1-1+deb13u1

Source 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/versions

6.0.2-1

Source reference: /affected/2/versions

6.0.2-2

Source reference: /affected/2/versions

6.0.2-3

Source reference: /affected/2/versions

6.0.3-1

Source reference: /affected/2/versions

6.0.3-2

Source reference: /affected/2/versions

6.0.3-3

Source reference: /affected/2/versions

6.0.4-1

Source reference: /affected/2/versions

6.0.5-1

Source 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
Read the original announcement

Revision history

  1. DEBIAN-CVE-2026-39863 · Revision 1Source updated