Asterisk: Possible RED T.140 Heap Buffer Overflow

{
  "id": "e700cdeee588024c28047ef8e52461866fc54c12e005567cd146986b52b5d907",
  "url": "https://www.cve.org/CVERecord?id=CVE-2026-57198",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Asterisk: Possible RED T.140 Heap Buffer Overflow",
    "summary": "Asterisk is an open source private branch exchange and telephony toolkit. In affected deployments, an authenticated attacker may cause a `T.140 RED` heap buffer overflow using carefully crafted packets, potentially allowing remote code execution or causing Asterisk to crash. The `chan_sip` channel driver must be installed and configured, and its `textsupport` option must be enabled; `textsupport` defaults to no. `The chan_sip driver was deprecated in Asterisk 20 and completely removed in all later versions.` Repository comparisons verify patch containment in Asterisk 20.20.1, 21.12.3, 22.10.1 and 23.4.1, and Certified Asterisk 20.7-cert11 and 22.8-cert3. The affected release-track scope remains unresolved: structured metadata includes later release tracks even though the advisory says the required `chan_sip` driver was removed there.",
    "evidence": "cve:CVE-2026-57198",
    "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-2026-57198",
      "aliases": [
        "CVE-2026-57198"
      ],
      "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:L/VI:L/VA:L/SC:N/SI:N/SA:N",
            "userInteraction": "NONE",
            "attackComplexity": "LOW",
            "attackRequirements": "PRESENT",
            "privilegesRequired": "LOW",
            "subIntegrityImpact": "NONE",
            "vulnIntegrityImpact": "LOW",
            "subAvailabilityImpact": "NONE",
            "vulnAvailabilityImpact": "LOW",
            "subConfidentialityImpact": "NONE",
            "vulnConfidentialityImpact": "LOW"
          }
        }
      ],
      "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": "2026-10-27T16:47:20.717Z",
      "provider": "cve",
      "references": [
        "https://github.com/asterisk/asterisk/security/advisories/GHSA-vfhr-r9x9-c687",
        "https://github.com/asterisk/asterisk/commit/0601c33d4edf8c8f221de91cead59460fb1e7180",
        "https://github.com/asterisk/asterisk/commit/111487298a954a029daae941eac423f0609b1261",
        "https://github.com/asterisk/asterisk/commit/536218a86b797996e8e8844deacc8207de373701",
        "https://github.com/asterisk/asterisk/commit/a89b61d7c756f816c7fa5327ead9e889f1531202",
        "https://github.com/asterisk/asterisk/commit/eaa108c68a32c080d7a168ef1d8bf784d5d830f4",
        "https://github.com/asterisk/asterisk/commit/eef894282be203cb9e6d8e9692e9c360a0b569b4",
        "https://github.com/asterisk/asterisk/commit/fde69a1f3ff17f507a1578ae27b528f43ceb5efd",
        "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": "2026-10-27T16:47:20.717Z"
        }
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-57198",
        "evidence": "/cveMetadata/cveId"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/containers/cna/metrics"
  },
  "source_id": "core-cve",
  "document_id": 394471,
  "published_at": "2026-10-27T16:47:20.717+00:00"
}