{"id":"CVE-2026-57194","aliases":[],"title":"Asterisk: chan_unistim DIALPAGE digit handling can overflow phone_number and crash Asterisk","titleSource":"GitHub_M","descriptionSource":"GitHub_M","products":[{"vendor":"asterisk","name":"asterisk","platforms":[],"versions":[{"version":"< 20.20.1","status":"affected"},{"version":">= 21.0.0-pre1, < 21.12.3","status":"affected"},{"version":">= 22.0.0-pre1, < 22.10.1","status":"affected"},{"version":">= 23.0.0-pre1, < 23.4.1","status":"affected"}],"source":"GitHub_M","url":"https://www.cve.org/CVERecord?id=CVE-2026-57194"},{"vendor":"asterisk","name":"certified-asterisk","platforms":[],"versions":[{"version":"< 20.7-cert11","status":"affected"},{"version":">= 22.8-cert1-pre1, < 22.8-cert3","status":"affected"}],"source":"GitHub_M","url":"https://www.cve.org/CVERecord?id=CVE-2026-57194"}],"remediation":[],"description":"Asterisk is an open source private branch exchange and telephony toolkit. Prior to Asterisk 20.20.1, 21.12.3, 22.10.1, 23.4.1 and Certified Asterisk 20.7-cert11, 22.8-cert3, an out-of-bounds write in `chan_unistim` `DIALPAGE` digit handling can overflow the `phone_number` field and crash Asterisk when an attacker sends a carefully crafted incoming request packet. The `chan_unistim` module must be loaded and configured with a valid `UNISTIM UDP port` that the attacker can reach. The attacker must register as a configured `phone MAC`, or the deployment must have an equivalent `production/autoprovisioning` path that allows the client to reach the main page. This issue is fixed in Asterisk 20.20.1, 21.12.3, 22.10.1, 23.4.1 and Certified Asterisk 20.7-cert11, 22.8-cert3.","severity":"medium","score":5.9,"published":"2026-10-27T16:52:47.225Z","modified":"2026-10-27T16:52:47.225Z","withdrawn":false,"knownExploited":false,"affected":[],"references":["https://github.com/asterisk/asterisk/security/advisories/GHSA-3g56-cgrh-95p5","https://github.com/asterisk/asterisk/commit/430f423c84e4e32a462d907632b66c9793236e96","https://github.com/asterisk/asterisk/commit/6da8e10c210d8e014c27c67235252e1dfc794446","https://github.com/asterisk/asterisk/commit/6f414ec771eaa3318a4b2d28f70fa387196ae283","https://github.com/asterisk/asterisk/commit/ce6e2233599b76bc30c33b4816b15609c8ddc8b6","https://github.com/asterisk/asterisk/commit/d803b5370b05f39a6241b2556eb9894b02148e6a","https://github.com/asterisk/asterisk/commit/fc3a1cb3c386c962bfca8cd9d533d1390d4ad933","https://github.com/asterisk/asterisk/commit/ff65e4b0867bee12cdcb3a6219b976ee7ee08963","https://github.com/asterisk/asterisk/releases/tag/20.20.1","https://github.com/asterisk/asterisk/releases/tag/21.12.3","https://github.com/asterisk/asterisk/releases/tag/22.10.1","https://github.com/asterisk/asterisk/releases/tag/23.4.1","https://github.com/asterisk/asterisk/releases/tag/certified-20.7-cert11","https://github.com/asterisk/asterisk/releases/tag/certified-22.8-cert3","https://github.com/asterisk/asterisk/tree/24.0.0-pre1"],"sources":[{"name":"CVE","id":"CVE-2026-57194","modified":"2026-10-27T16:52:47.225Z","url":"https://www.cve.org/CVERecord?id=CVE-2026-57194"}],"assessments":[{"source":"GitHub_M","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","score":5.9}],"sourceAffected":[],"kev":{"status":"not-listed","checkedAt":"2026-10-28T10:00:32.459Z"},"coverage":[{"source":"NVD","status":"not-checked"},{"source":"GHSA","status":"not-checked"},{"source":"EUVD","status":"not-checked"},{"source":"EPSS","status":"not-checked"}],"evidence":[]}