{"id":"CVE-2026-39863","aliases":["ALPINE-CVE-2026-39863","DEBIAN-CVE-2026-39863","EUVD-2026-20616","GHSA-2wj4-f825-2h2f","UBUNTU-CVE-2026-39863"],"status":"published","title":"Kamailio Core: TCP Data Processing Vulnerability","description":"Kamailio is an open source implementation of a SIP Signaling Server. Prior to 6.1.1, 6.0.6, and 5.8.8, an out-of-bounds access in the core of Kamailio (formerly OpenSER and SER) allows remote attackers to cause a denial of service (process crash) via a specially crafted data packet sent over TCP. The issue impacts Kamailio instances having TCP or TLS listeners. This vulnerability is fixed in 5.1.1, 6.0.6, and 5.8.8.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00471,"percentile":0.41214,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-119"],"published":"2026-04-08T19:55:56Z","modified":"2026-10-28T02:30:45Z","fixes":[{"ecosystem":"Alpine:v3.14","package":"kamailio","fixed_in":["5.4.5-r2"],"sources":["osv"]},{"ecosystem":"Alpine:v3.20","package":"kamailio","fixed_in":["5.8.8-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.21","package":"kamailio","fixed_in":["5.8.8-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.22","package":"kamailio","fixed_in":["6.0.6-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.23","package":"kamailio","fixed_in":["6.0.6-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.24","package":"kamailio","fixed_in":["6.0.6-r0"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"kamailio","fixed_in":["6.0.1-1+deb13u2"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"kamailio","fixed_in":["6.1.1-2"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Alpine:v3.14","package":"kamailio","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.0.0"},{"fixed":"5.4.5-r2"}]}]},{"source":"osv","ecosystem":"Alpine:v3.20","package":"kamailio","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.0.0"},{"fixed":"5.8.8-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.21","package":"kamailio","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.0.0"},{"fixed":"5.8.8-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.22","package":"kamailio","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.0.0"},{"fixed":"6.0.6-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.23","package":"kamailio","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.0.0"},{"fixed":"6.0.6-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.24","package":"kamailio","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.0.0"},{"fixed":"6.0.6-r0"}]}]},{"source":"osv","ecosystem":"Debian:12","package":"kamailio","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.6.3-2","5.6.4-1","5.7.0-1","5.7.2-1","5.7.3-1","5.7.4-1","5.8.2-2","5.8.2-3","5.8.2-4","5.8.3-1","5.8.4-1","5.8.5-1","6.0.0-1","6.0.1-1","6.0.2-1","6.0.2-2","6.0.2-3","6.0.3-1","6.0.3-2","6.0.3-3","6.0.4-1","6.0.5-1","6.1.1-2","6.1.1-2.1","6.1.2-1","6.1.3-1","6.1.3-2","6.1.4-1"]},{"source":"osv","ecosystem":"Debian:13","package":"kamailio","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.0.1-1+deb13u2"}]}],"versions":["6.0.1-1","6.0.1-1+deb13u1"]},{"source":"osv","ecosystem":"Debian:14","package":"kamailio","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.1.1-2"}]}],"versions":["6.0.1-1","6.0.2-1","6.0.2-2","6.0.2-3","6.0.3-1","6.0.3-2","6.0.3-3","6.0.4-1","6.0.5-1"]},{"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:25.10","package":"kamailio","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.8.4-1build1","6.0.1-1build2","6.0.2-2"]},{"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"]}],"products":[{"vendor":"kamailio","product":"kamailio"}],"references":[{"url":"https://github.com/kamailio/kamailio/security/advisories/GHSA-2wj4-f825-2h2f","tags":["x_refsource_CONFIRM","Vendor Advisory","advisory","report"]},{"url":"https://security.alpinelinux.org/vuln/CVE-2026-39863","tags":["advisory"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/39xxx/CVE-2026-39863.json","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-39863","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-39863","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-39863","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-39863","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2026-39863","title":"Kamailio Core: TCP Data Processing Vulnerability","description":"Kamailio is an open source implementation of a SIP Signaling Server. Prior to 6.1.1, 6.0.6, and 5.8.8, an out-of-bounds access in the core of Kamailio (formerly OpenSER and SER) allows remote attackers to cause a denial of service (process crash) via a specially crafted data packet sent over TCP. The issue impacts Kamailio instances having TCP or TLS listeners. This vulnerability is fixed in 5.1.1, 6.0.6, and 5.8.8.","status":"published","published":"2026-04-08T19:55:56.632Z","modified":"2026-04-09T13:52:38.03Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-119"],"updated_at":"2026-11-02T14:20:02.290587Z"}],"euvd":[{"id":"EUVD-2026-20616","description":"Kamailio is an open source implementation of a SIP Signaling Server. Prior to 6.1.1, 6.0.6, and 5.8.8, an out-of-bounds access in the core of Kamailio (formerly OpenSER and SER) allows remote attackers to cause a denial of service (process crash) via a specially crafted data packet sent over TCP. The issue impacts Kamailio instances having TCP or TLS listeners. This vulnerability is fixed in 5.1.1, 6.0.6, and 5.8.8.","status":"published","published":"2026-04-08T19:55:56Z","modified":"2026-04-09T13:52:38Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T19:24:31.230458Z"}],"nvd":[{"id":"CVE-2026-39863","description":"Kamailio is an open source implementation of a SIP Signaling Server. Prior to 6.1.1, 6.0.6, and 5.8.8, an out-of-bounds access in the core of Kamailio (formerly OpenSER and SER) allows remote attackers to cause a denial of service (process crash) via a specially crafted data packet sent over TCP. The issue impacts Kamailio instances having TCP or TLS listeners. This vulnerability is fixed in 5.1.1, 6.0.6, and 5.8.8.","status":"published","published":"2026-04-08T20:16:26.55Z","modified":"2026-07-24T21:10:00.143Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-119"],"updated_at":"2026-11-02T14:12:13.902911Z"}],"osv":[{"id":"ALPINE-CVE-2026-39863","description":"Kamailio is an open source implementation of a SIP Signaling Server. Prior to 6.1.1, 6.0.6, and 5.8.8, an out-of-bounds access in the core of Kamailio (formerly OpenSER and SER) allows remote attackers to cause a denial of service (process crash) via a specially crafted data packet sent over TCP. The issue impacts Kamailio instances having TCP or TLS listeners. This vulnerability is fixed in 5.1.1, 6.0.6, and 5.8.8.","status":"published","published":"2026-04-08T20:16:26.55Z","modified":"2026-10-01T02:17:49.27107801Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:27:50.764331Z"},{"id":"CVE-2026-39863","title":"Kamailio Core: TCP Data Processing Vulnerability","description":"Kamailio is an open source implementation of a SIP Signaling Server. Prior to 6.1.1, 6.0.6, and 5.8.8, an out-of-bounds access in the core of Kamailio (formerly OpenSER and SER) allows remote attackers to cause a denial of service (process crash) via a specially crafted data packet sent over TCP. The issue impacts Kamailio instances having TCP or TLS listeners. This vulnerability is fixed in 5.1.1, 6.0.6, and 5.8.8.","status":"published","published":"2026-04-08T19:55:56.632Z","modified":"2026-10-28T02:30:45.447529434Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-119"],"updated_at":"2026-11-02T15:45:03.040464Z"},{"id":"DEBIAN-CVE-2026-39863","description":"Kamailio is an open source implementation of a SIP Signaling Server. Prior to 6.1.1, 6.0.6, and 5.8.8, an out-of-bounds access in the core of Kamailio (formerly OpenSER and SER) allows remote attackers to cause a denial of service (process crash) via a specially crafted data packet sent over TCP. The issue impacts Kamailio instances having TCP or TLS listeners. This vulnerability is fixed in 5.1.1, 6.0.6, and 5.8.8.","status":"published","published":"2026-04-08T20:16:26.55Z","modified":"2026-10-01T03:03:11.863641904Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:45:54.892385Z"},{"id":"UBUNTU-CVE-2026-39863","description":"Kamailio is an open source implementation of a SIP Signaling Server. Prior to 6.1.1, 6.0.6, and 5.8.8, an out-of-bounds access in the core of Kamailio (formerly OpenSER and SER) allows remote attackers to cause a denial of service (process crash) via a specially crafted data packet sent over TCP. The issue impacts Kamailio instances having TCP or TLS listeners. This vulnerability is fixed in 5.1.1, 6.0.6, and 5.8.8.","status":"published","published":"2026-04-08T20:16:00Z","modified":"2026-10-17T12:58:13.902276837Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T16:56:16.686388Z"}]}}