CVE-2026-106803
criticalA stack-based buffer overflow exists in Kamailio v6.1.3 and v6.1.4 in the ims_registrar_pcscf module.
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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Affected products
Not reported by the source (unknown — not "none").
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://gist.github.com/hackeryounow/7d7ccc9ec501a5d8c9143b2e1bcc11cb cve@mitre.org
- https://github.com/kamailio/kamailio/commit/21261436492f0014930e804e20586e3833bb91b9 cve@mitre.org
- https://github.com/kamailio/kamailio/issues/4954 cve@mitre.org
- https://github.com/kamailio/kamailio/pull/4958 cve@mitre.org
- https://github.com/kamailio/kamailio/issues/4954 134c704f-9b21-4f2e-91b3-4a467353bcc0