{"id":"CVE-2026-57199","state":"PUBLISHED","title":"Asterisk: Asterisk app_sms.c copies externally controlled SMS lengths into fixed in-struct buffers","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, `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.","publishedAt":"2026-10-27T21:52:42.436Z","updatedAt":"2026-10-27T21:52:42.436Z","severity":{"score":2.3,"label":"Low","version":"4.0","vector":"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","source":"GitHub_M"},"assigner":"GitHub_M","products":["asterisk asterisk","asterisk certified-asterisk"],"affected":[{"vendor":"asterisk","product":"asterisk","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"}]},{"vendor":"asterisk","product":"certified-asterisk","versions":[{"version":"< 20.7-cert11","status":"affected"},{"version":">= 22.8-cert1-pre1, < 22.8-cert3","status":"affected"}]}],"references":["https://github.com/asterisk/asterisk/security/advisories/GHSA-q9fr-m7g8-6ph5","https://github.com/asterisk/asterisk/commit/15c66022dc441ec63d7bd5f53cf7f35db72964be","https://github.com/asterisk/asterisk/commit/38a2059eb77a91a6b6e76eeba5875c2b96027368","https://github.com/asterisk/asterisk/commit/59b74276f24ba104d859f3f05897c9b8d835a28a","https://github.com/asterisk/asterisk/commit/60f4ef3deac6b9af30519b46c13f103264038b82","https://github.com/asterisk/asterisk/commit/661d6a2fc5cc7744ab9d849ed3c73ae5066386df","https://github.com/asterisk/asterisk/commit/7048a3841df99e090b9d87246600373581629c98","https://github.com/asterisk/asterisk/commit/f46f63bd4d33665d336cf8b5998650b915222549","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"],"weaknesses":["CWE-787"],"ingestedAt":"2026-10-29T20:12:24.861Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/57xxx/CVE-2026-57199.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-57199","state":"PUBLISHED","datePublished":"2026-10-27T21:52:42.436Z","dateUpdated":"2026-10-27T21:52:42.436Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-06-24T02:00:46.800Z"},"containers":{"cna":{"title":"Asterisk: Asterisk app_sms.c copies externally controlled SMS lengths into fixed in-struct buffers","descriptions":[{"lang":"en","value":"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 `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."}],"affected":[{"vendor":"asterisk","product":"asterisk","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"}]},{"vendor":"asterisk","product":"certified-asterisk","versions":[{"version":"< 20.7-cert11","status":"affected"},{"version":">= 22.8-cert1-pre1, < 22.8-cert3","status":"affected"}]}],"references":[{"url":"https://github.com/asterisk/asterisk/security/advisories/GHSA-q9fr-m7g8-6ph5","name":"https://github.com/asterisk/asterisk/security/advisories/GHSA-q9fr-m7g8-6ph5","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/asterisk/asterisk/commit/15c66022dc441ec63d7bd5f53cf7f35db72964be","name":"https://github.com/asterisk/asterisk/commit/15c66022dc441ec63d7bd5f53cf7f35db72964be","tags":["x_refsource_MISC"]},{"url":"https://github.com/asterisk/asterisk/commit/38a2059eb77a91a6b6e76eeba5875c2b96027368","name":"https://github.com/asterisk/asterisk/commit/38a2059eb77a91a6b6e76eeba5875c2b96027368","tags":["x_refsource_MISC"]},{"url":"https://github.com/asterisk/asterisk/commit/59b74276f24ba104d859f3f05897c9b8d835a28a","name":"https://github.com/asterisk/asterisk/commit/59b74276f24ba104d859f3f05897c9b8d835a28a","tags":["x_refsource_MISC"]},{"url":"https://github.com/asterisk/asterisk/commit/60f4ef3deac6b9af30519b46c13f103264038b82","name":"https://github.com/asterisk/asterisk/commit/60f4ef3deac6b9af30519b46c13f103264038b82","tags":["x_refsource_MISC"]},{"url":"https://github.com/asterisk/asterisk/commit/661d6a2fc5cc7744ab9d849ed3c73ae5066386df","name":"https://github.com/asterisk/asterisk/commit/661d6a2fc5cc7744ab9d849ed3c73ae5066386df","tags":["x_refsource_MISC"]},{"url":"https://github.com/asterisk/asterisk/commit/7048a3841df99e090b9d87246600373581629c98","name":"https://github.com/asterisk/asterisk/commit/7048a3841df99e090b9d87246600373581629c98","tags":["x_refsource_MISC"]},{"url":"https://github.com/asterisk/asterisk/commit/f46f63bd4d33665d336cf8b5998650b915222549","name":"https://github.com/asterisk/asterisk/commit/f46f63bd4d33665d336cf8b5998650b915222549","tags":["x_refsource_MISC"]},{"url":"https://github.com/asterisk/asterisk/releases/tag/20.20.1","name":"https://github.com/asterisk/asterisk/releases/tag/20.20.1","tags":["x_refsource_MISC"]},{"url":"https://github.com/asterisk/asterisk/releases/tag/21.12.3","name":"https://github.com/asterisk/asterisk/releases/tag/21.12.3","tags":["x_refsource_MISC"]},{"url":"https://github.com/asterisk/asterisk/releases/tag/22.10.1","name":"https://github.com/asterisk/asterisk/releases/tag/22.10.1","tags":["x_refsource_MISC"]},{"url":"https://github.com/asterisk/asterisk/releases/tag/23.4.1","name":"https://github.com/asterisk/asterisk/releases/tag/23.4.1","tags":["x_refsource_MISC"]},{"url":"https://github.com/asterisk/asterisk/releases/tag/certified-20.7-cert11","name":"https://github.com/asterisk/asterisk/releases/tag/certified-20.7-cert11","tags":["x_refsource_MISC"]},{"url":"https://github.com/asterisk/asterisk/releases/tag/certified-22.8-cert3","name":"https://github.com/asterisk/asterisk/releases/tag/certified-22.8-cert3","tags":["x_refsource_MISC"]},{"url":"https://github.com/asterisk/asterisk/tree/24.0.0-pre1","name":"https://github.com/asterisk/asterisk/tree/24.0.0-pre1","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"PRESENT","privilegesRequired":"LOW","userInteraction":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","vulnAvailabilityImpact":"LOW","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":2.3,"baseSeverity":"LOW","vectorString":"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","version":"4.0"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-787","lang":"en","description":"CWE-787: Out-of-bounds Write","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-10-27T21:52:42.436Z"},"source":{"advisory":"GHSA-q9fr-m7g8-6ph5","discovery":"UNKNOWN"}}}}}