{"id":"CVE-2026-57199","title":"Asterisk: Asterisk app_sms.c copies externally controlled SMS lengths into fixed in-struct buffers","summary":"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, `app_sms.c` copies externally controlled `SMS` lengths into `fi…","severity":"low","cvss":2.3,"cvssVector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N","cvssSource":"cna","cwe":["CWE-787"],"vendor":"asterisk","product":"asterisk","affected":["asterisk < 20.20.1","asterisk >= 21.0.0-pre1, < 21.12.3","asterisk >= 22.0.0-pre1, < 22.10.1","asterisk >= 23.0.0-pre1, < 23.4.1","certified-asterisk < 20.7-cert11","certified-asterisk >= 22.8-cert1-pre1, < 22.8-cert3"],"published":"2026-10-27","updated":"2026-10-27","sourceUpdated":"2026-10-27T21:52:42.436Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-57199","references":[{"url":"https://github.com/asterisk/asterisk/security/advisories/GHSA-q9fr-m7g8-6ph5","label":"https://github.com/asterisk/asterisk/security/advisories/GHSA-q9fr-m7g8-6ph5"},{"url":"https://github.com/asterisk/asterisk/commit/15c66022dc441ec63d7bd5f53cf7f35db72964be","label":"https://github.com/asterisk/asterisk/commit/15c66022dc441ec63d7bd5f53cf7f35db72964be"},{"url":"https://github.com/asterisk/asterisk/commit/38a2059eb77a91a6b6e76eeba5875c2b96027368","label":"https://github.com/asterisk/asterisk/commit/38a2059eb77a91a6b6e76eeba5875c2b96027368"},{"url":"https://github.com/asterisk/asterisk/commit/59b74276f24ba104d859f3f05897c9b8d835a28a","label":"https://github.com/asterisk/asterisk/commit/59b74276f24ba104d859f3f05897c9b8d835a28a"},{"url":"https://github.com/asterisk/asterisk/commit/60f4ef3deac6b9af30519b46c13f103264038b82","label":"https://github.com/asterisk/asterisk/commit/60f4ef3deac6b9af30519b46c13f103264038b82"},{"url":"https://github.com/asterisk/asterisk/commit/661d6a2fc5cc7744ab9d849ed3c73ae5066386df","label":"https://github.com/asterisk/asterisk/commit/661d6a2fc5cc7744ab9d849ed3c73ae5066386df"},{"url":"https://github.com/asterisk/asterisk/commit/7048a3841df99e090b9d87246600373581629c98","label":"https://github.com/asterisk/asterisk/commit/7048a3841df99e090b9d87246600373581629c98"},{"url":"https://github.com/asterisk/asterisk/commit/f46f63bd4d33665d336cf8b5998650b915222549","label":"https://github.com/asterisk/asterisk/commit/f46f63bd4d33665d336cf8b5998650b915222549"},{"url":"https://github.com/asterisk/asterisk/releases/tag/20.20.1","label":"https://github.com/asterisk/asterisk/releases/tag/20.20.1"},{"url":"https://github.com/asterisk/asterisk/releases/tag/21.12.3","label":"https://github.com/asterisk/asterisk/releases/tag/21.12.3"},{"url":"https://github.com/asterisk/asterisk/releases/tag/22.10.1","label":"https://github.com/asterisk/asterisk/releases/tag/22.10.1"},{"url":"https://github.com/asterisk/asterisk/releases/tag/23.4.1","label":"https://github.com/asterisk/asterisk/releases/tag/23.4.1"},{"url":"https://github.com/asterisk/asterisk/releases/tag/certified-20.7-cert11","label":"https://github.com/asterisk/asterisk/releases/tag/certified-20.7-cert11"},{"url":"https://github.com/asterisk/asterisk/releases/tag/certified-22.8-cert3","label":"https://github.com/asterisk/asterisk/releases/tag/certified-22.8-cert3"},{"url":"https://github.com/asterisk/asterisk/tree/24.0.0-pre1","label":"https://github.com/asterisk/asterisk/tree/24.0.0-pre1"}],"tags":["cve.org"],"ingestedAt":"2026-10-27T22:58:58.463Z","slug":"CVE-2026-57199","body":"## Overview\n\nAsterisk 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, `app_sms.c` copies externally controlled `SMS` lengths into `fixed in-struct buffers` without sufficient bounds checks, allowing an attacker to corrupt memory or crash Asterisk. The administrator must explicitly use the `SMS` dialplan application, which is useful when routing calls to or from `analog devices`, and must not have ensured that data passed to the application is valid. 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.\n\n## Affected\n\n- `asterisk < 20.20.1`\n- `asterisk >= 21.0.0-pre1, < 21.12.3`\n- `asterisk >= 22.0.0-pre1, < 22.10.1`\n- `asterisk >= 23.0.0-pre1, < 23.4.1`\n- `certified-asterisk < 20.7-cert11`\n- `certified-asterisk >= 22.8-cert1-pre1, < 22.8-cert3`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":13,"depthScoreParts":{"impact":12.6,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}