{"id":"CVE-2026-106803","aliases":["EUVD-2026-115344","GHSA-g9r9-79hc-j698","UBUNTU-CVE-2026-106803"],"status":"published","title":"A stack-based buffer overflow exists in Kamailio v6.1.3 and v6.1.4 in the ims_registrar_pcscf...","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.","severity":{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"adp","from":"cve"},"epss":{"day":"2026-11-12","score":0.00505,"percentile":0.43681,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-121"],"published":"2026-11-02T00:00:00Z","modified":"2026-11-04T03:30:29Z","affected":[{"source":"osv","ecosystem":"Ubuntu:Pro:16.04:LTS","package":"kamailio","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.3.1-2ubuntu1","4.3.4-1.1ubuntu1","4.3.4-1.1ubuntu2","4.3.4-1.1ubuntu2.1","4.3.4-1.1ubuntu2.1+esm1","4.3.4-1.1ubuntu2.1+esm2"]},{"source":"osv","ecosystem":"Ubuntu:Pro:18.04:LTS","package":"kamailio","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.4.2-3ubuntu5","5.0.4-1ubuntu1","5.1.1-1ubuntu1","5.1.1-1ubuntu4","5.1.2-1ubuntu1","5.1.2-1ubuntu2","5.1.2-1ubuntu2+esm1","5.1.2-1ubuntu2+esm2"]},{"source":"osv","ecosystem":"Ubuntu:Pro:20.04:LTS","package":"kamailio","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.2.3-1build3","5.2.3-1build4","5.3.0-2","5.3.1-1","5.3.2-1build1","5.3.2-1build2","5.3.2-1build3","5.3.2-1ubuntu0.1~esm1","5.3.2-1ubuntu0.1~esm2"]},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"kamailio","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.4.4-1build1","5.4.4-1ubuntu1","5.4.4-1ubuntu2","5.5.4-1"]},{"source":"osv","ecosystem":"Ubuntu:24.04:LTS","package":"kamailio","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.7.0-1build1","5.7.2-1build1","5.7.3-1","5.7.4-1","5.7.4-1build1","5.7.4-1build5","5.7.4-1build7"]},{"source":"osv","ecosystem":"Ubuntu:26.10","package":"kamailio","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["6.0.5-1ubuntu1","6.1.2-1ubuntu2","6.1.2-1ubuntu3","6.1.2-1ubuntu4"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"kamailio","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["6.0.2-2","6.0.5-1","6.0.5-1build1","6.0.5-1ubuntu1"]}],"references":[{"url":"https://github.com/kamailio/kamailio/issues/4954","tags":["exploit","report"]},{"url":"https://github.com/kamailio/kamailio/pull/4958","tags":["fix","report"]},{"url":"https://github.com/kamailio/kamailio/commit/21261436492f0014930e804e20586e3833bb91b9","tags":["fix","report"]},{"url":"https://gist.github.com/hackeryounow/7d7ccc9ec501a5d8c9143b2e1bcc11cb","tags":["web","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-106803","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-g9r9-79hc-j698"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/106xxx/CVE-2026-106803.json","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-106803","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-106803","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2026-106803","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.","status":"published","published":"2026-11-02T00:00:00Z","modified":"2026-11-03T13:33:16.962Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"adp"}],"cwes":["CWE-121"],"updated_at":"2026-11-03T14:28:05.368159Z"}],"euvd":[{"id":"EUVD-2026-115344","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.","status":"published","published":"2026-11-02T00:00:00Z","modified":"2026-11-03T13:33:16Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-03T15:18:10.516363Z"}],"ghsa":[{"id":"GHSA-g9r9-79hc-j698","title":"A stack-based buffer overflow exists in Kamailio v6.1.3 and v6.1.4 in the ims_registrar_pcscf...","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.","status":"published","published":"2026-11-02T18:32:27Z","modified":"2026-11-03T15:32:50Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-121"],"updated_at":"2026-11-03T15:57:24.491182Z"}],"nvd":[{"id":"CVE-2026-106803","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.","status":"published","published":"2026-11-02T17:17:33.27Z","modified":"2026-11-03T14:17:17.387Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"secondary"}],"cwes":["CWE-121"],"updated_at":"2026-11-03T18:16:47.713454Z"}],"osv":[{"id":"CVE-2026-106803","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.","status":"published","published":"2026-11-02T00:00:00Z","modified":"2026-11-05T08:04:06.754686125Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-05T09:08:14.330889Z"},{"id":"UBUNTU-CVE-2026-106803","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.","status":"published","published":"2026-11-02T17:17:00Z","modified":"2026-11-05T11:45:23.207930824Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-05T13:30:49.23793Z"}]}}