{"id":"CVE-2026-106804","title":"A stack-based buffer overflow exists in Kamailio v6.1.3 and v6.1.4 in the ims_qos_npn module","summary":"A stack-based buffer overflow exists in Kamailio v6.1.3 and v6.1.4 in the ims_qos_npn module. The w_rx_aar_register() function copies the attacker-controlled host field from the SIP `Via` header into a fixed 46-byte stack buffer without …","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cvssSource":"adp","ssvc":{"exploitation":"poc","automatable":"yes","technicalImpact":"partial","timestamp":"2026-11-02T18:54:35.760686Z"},"exploitAvailable":true,"published":"2026-11-02","updated":"2026-11-02","sourceUpdated":"2026-11-02T18:55:18.235Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-106804","references":[{"url":"https://github.com/kamailio/kamailio/issues/4953"},{"url":"https://gist.github.com/hackeryounow/f5af75502ea6df600428c46bb9bbf39e"}],"tags":["cve.org","exploit-available"],"epss":0.00573,"epssPercentile":0.47567,"ingestedAt":"2026-11-05T19:30:42.780Z","slug":"CVE-2026-106804","body":"## Overview\n\nA stack-based buffer overflow exists in Kamailio v6.1.3 and v6.1.4 in the ims_qos_npn module. The w_rx_aar_register() function copies the attacker-controlled host field from the SIP `Via` header into a fixed 46-byte stack buffer without validating its length. An unauthenticated remote attacker can trigger the vulnerability with a crafted SIP `REGISTER` request, causing stack corruption and termination of the affected Kamailio instance, resulting in denial of service.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"midnight","depthScore":53,"depthScoreParts":{"impact":41.3,"likelihood":0.1,"exploitation":12,"ransomware":0},"changes":[]}