{"id":"CVE-2026-106803","title":"A stack-based buffer overflow exists in Kamailio v6.1.3 and v6.1.4 in the ims_registrar_pcscf module","summary":"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 a…","severity":"critical","cvss":9.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cvssSource":"adp","ssvc":{"exploitation":"poc","automatable":"yes","technicalImpact":"total","timestamp":"2026-11-03T13:31:38.995410Z"},"exploitAvailable":true,"published":"2026-11-02","updated":"2026-11-03","sourceUpdated":"2026-11-03T13:33:16.962Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-106803","references":[{"url":"https://github.com/kamailio/kamailio/issues/4954"},{"url":"https://github.com/kamailio/kamailio/pull/4958"},{"url":"https://github.com/kamailio/kamailio/commit/21261436492f0014930e804e20586e3833bb91b9"},{"url":"https://gist.github.com/hackeryounow/7d7ccc9ec501a5d8c9143b2e1bcc11cb"}],"tags":["cve.org","exploit-available"],"epss":0.00505,"epssPercentile":0.43416,"ingestedAt":"2026-11-05T19:30:42.949Z","slug":"CVE-2026-106803","body":"## Overview\n\nA 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"abyssal","depthScore":66,"depthScoreParts":{"impact":53.9,"likelihood":0.1,"exploitation":12,"ransomware":0},"changes":[]}