Asterisk: Asterisk app_sms.c copies externally controlled SMS lengths into fixed in-struct buffers

{
  "id": "34ce8c8cf3621107c0946108f4a74c4e7be6b7334bc2452cbfb6f4282d09d506",
  "url": "https://www.cve.org/CVERecord?id=CVE-2026-57199",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "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 `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.",
    "evidence": "cve:CVE-2026-57199",
    "products": [
      {
        "name": {
          "value": "asterisk",
          "evidence": "/containers/cna/affected/0/product"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": []
      },
      {
        "name": {
          "value": "certified-asterisk",
          "evidence": "/containers/cna/affected/1/product"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": []
      }
    ],
    "severity": "low",
    "structured": {
      "id": "CVE-2026-57199",
      "aliases": [
        "CVE-2026-57199"
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "version": "4.0",
            "baseScore": 2.3,
            "attackVector": "NETWORK",
            "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",
            "userInteraction": "NONE",
            "attackComplexity": "LOW",
            "attackRequirements": "PRESENT",
            "privilegesRequired": "LOW",
            "subIntegrityImpact": "NONE",
            "vulnIntegrityImpact": "NONE",
            "subAvailabilityImpact": "NONE",
            "vulnAvailabilityImpact": "LOW",
            "subConfidentialityImpact": "NONE",
            "vulnConfidentialityImpact": "NONE"
          }
        }
      ],
      "affected": [
        {
          "vendor": "asterisk",
          "product": "asterisk",
          "versions": [
            {
              "status": "affected",
              "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"
            }
          ]
        },
        {
          "vendor": "asterisk",
          "product": "certified-asterisk",
          "versions": [
            {
              "status": "affected",
              "version": "< 20.7-cert11"
            },
            {
              "status": "affected",
              "version": ">= 22.8-cert1-pre1, < 22.8-cert3"
            }
          ]
        }
      ],
      "modified": "2026-10-27T21:52:42.436Z",
      "provider": "cve",
      "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"
      ],
      "provider_metadata": {
        "cna": {
          "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
          "shortName": "GitHub_M",
          "dateUpdated": "2026-10-27T21:52:42.436Z"
        }
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-57199",
        "evidence": "/cveMetadata/cveId"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/containers/cna/metrics"
  },
  "source_id": "core-cve",
  "document_id": 400615,
  "published_at": "2026-10-27T21:52:42.436+00:00"
}