A stack-based buffer overflow exists in Kamailio v6.1.3 and v6.1.4 in the ims_registrar_pcscf module. When processing a crafted application/reginfo+xml NOTIFY message, process_contact() copies an attacker-controlled port value from the alias parameter into a fixed 5-byte stack buffer without validating its length. An unauthenticated remote attacker can trigger stack corruption and terminate the P-CSCF process, resulting in denial of service.
History

Mon, 02 Nov 2026 18:45:00 +0000

Type Values Removed Values Added
Title Stack‑Based Buffer Overflow in Kamailio ims_registrar_pcscf Module Allowing Denial of Service
Weaknesses CWE-121

Mon, 02 Nov 2026 17:15:00 +0000

Type Values Removed Values Added
Description A stack-based buffer overflow exists in Kamailio v6.1.3 and v6.1.4 in the ims_registrar_pcscf module. When processing a crafted application/reginfo+xml NOTIFY message, process_contact() copies an attacker-controlled port value from the alias parameter into a fixed 5-byte stack buffer without validating its length. An unauthenticated remote attacker can trigger stack corruption and terminate the P-CSCF process, resulting in denial of service.
References

cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published: 2026-11-02T00:00:00.000Z

Updated: 2026-11-02T17:09:06.900Z

Reserved: 2026-10-07T00:00:00.000Z

Link: CVE-2026-106803

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-11-02T17:17:33.270

Modified: 2026-11-02T17:17:33.270

Link: CVE-2026-106803

cve-icon Redhat

No data.