{"id":"CVE-2026-106803","details":"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.","modified":"2026-11-03T02:45:38.563878236Z","published":"2026-11-02T00:00:00Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/106xxx/CVE-2026-106803.json","cna_assigner":"mitre"},"references":[{"type":"WEB","url":"https://gist.github.com/hackeryounow/7d7ccc9ec501a5d8c9143b2e1bcc11cb"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/106xxx/CVE-2026-106803.json"},{"type":"FIX","url":"https://github.com/kamailio/kamailio/commit/21261436492f0014930e804e20586e3833bb91b9"},{"type":"REPORT","url":"https://github.com/kamailio/kamailio/issues/4954"},{"type":"FIX","url":"https://github.com/kamailio/kamailio/pull/4958"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-106803"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/kamailio/kamailio","events":[{"introduced":"0"},{"fixed":"21261436492f0014930e804e20586e3833bb91b9"}],"database_specific":{"extracted_events":[{"range":[{"fixed":"21261436492f0014930e804e20586e3833bb91b9"}],"source":"REFERENCES_COMMIT"}]}}],"versions":["sr_3.1_freeze","3.0_pre1","sr_before_modules_merge","before_dest_info_changes_2","before_tm_timers","new_timers","before_new_timers","tmp_pcl_tag_17368Js8","after_0_9_4_pkg_merge","last_merge_to_janakj","rel_0_9_0_root","after_makefile_merges","before_malloc_changes","before_db_api_changes","after_testing_0_8_12_r1_merge","before_testing_0_8_12_r1_merge","after_testing_0_8_12_r0_merge","before_testing_0_8_12_r0_merge","before_tcp_port_aliases","before_socket_info_lists","before_lumps_split","testing_0_8_12_root","v0_8_13dev-t16","v0_8_12dev_t13","v0_8_12dev_t05","v0_8_12dev-t03","v0_8_12_t02_merged_w_v0_8_11pre35","v0_8_11dev34","rel_0_8_11_root","v0_8_11pre29-prerelease-cd","v0_8_11pre29-prerelease","v0_8_11pre29","pre22","bflmpsvz","before_kill_repl_add_rm","v0_8_11_pre9","mem-fixes","v0_8_11pre8","old_mod_iface","after_xl","before_replication_patch","before_xl","pre6-tcp4","pre6-tcp5-tm","tcp2","wo_sp","post-zt","pre-zt","ser_0_8_10","ser_0_8_10_pre5","ser_0_8_10_pre4","ser_0_8_10_pre2","ser_0_8_10_pre3","myself_port_lo","new_hash","ser_0_8_9-release","ser_0_8_9","ser_0_8_8-final-cd-release","v0_8_8","fixstats","pre_fixstats","gpled","pregpl","listen_ifs","before_str2ip_changes","budvar","bigbang","pre-bigbang","srv","ipv6","ipv4_working","ser_0_8_7-0-unstable","ser_0_8_6-6-beer-release","ser_0_8_6-5-stable","ser_0-8-6-4","bogdan_final_version","ser_0839_errors","ser_0_8_3_2","ser_0_8_3_1","sip_083","ser_082","ser_081-plugins","sip_pre-plugin","ser_0_7","new_cfg_compiles","sr_simpleconfig","v03","v0_2"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-106803.json"}}],"schema_version":"1.9.2"}