CVE-2026-48741 (GCVE-0-2026-48741)

Vulnerability from cvelistv5 – Published: 2026-10-16 15:45 – Updated: 2026-10-16 15:45
VLAI
Title
libIEC61850: Remote NULL dereference in MMS Read alternate-access sub-array path leads to server-side DoS
Summary
libIEC61850 is an open-source implementation of IEC 61850 client and server protocols including MMS, GOOSE, Sampled Values, and R-Session. Prior to 1.6.2, alternateArrayAccess in src/mms/iso_mms/server/mms_read_service.c does not validate an alternate-access sub-array range when numberOfElements is greater than zero. An out-of-range MmsValue_getElement call returns NULL, and the sub-array branch passes that value to MmsValue_isDeletable, causing a NULL pointer dereference. A remote MMS Read request can therefore crash servers whose data models contain arrays, while the single-element error path handles the same invalid index safely. This issue is fixed in version 1.6.2.
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE
  • CWE-129 - Improper Validation of Array Index
  • CWE-252 - Unchecked Return Value
  • CWE-476 - NULL Pointer Dereference
  • CWE-754 - Improper Check for Unusual or Exceptional Conditions
Assigner
GitHub_M CNA under the mitre root
CNA scorecard C 72/100 over 7771 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
mz-automation libiec61850 Affected: < 1.6.2
guessed Create a notification for this product.
Show details on NVD website
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{
  "containers": {
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        {
          "product": "libiec61850",
          "vendor": "mz-automation",
          "versions": [
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              "version": "\u003c 1.6.2"
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          "value": "libIEC61850 is an open-source implementation of IEC 61850 client and server protocols including MMS, GOOSE, Sampled Values, and R-Session. Prior to 1.6.2, alternateArrayAccess in src/mms/iso_mms/server/mms_read_service.c does not validate an alternate-access sub-array range when numberOfElements is greater than zero. An out-of-range MmsValue_getElement call returns NULL, and the sub-array branch passes that value to MmsValue_isDeletable, causing a NULL pointer dereference. A remote MMS Read request can therefore crash servers whose data models contain arrays, while the single-element error path handles the same invalid index safely. This issue is fixed in version 1.6.2."
        }
      ],
      "metrics": [
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            "attackVector": "NETWORK",
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            "baseScore": 7.5,
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            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
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            "scope": "UNCHANGED",
            "userInteraction": "NONE",
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        {
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              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
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              "cweId": "CWE-754",
              "description": "CWE-754: Improper Check for Unusual or Exceptional Conditions",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-16T15:45:32.680Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
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          "name": "https://github.com/mz-automation/libiec61850/security/advisories/GHSA-8mfr-hq64-9w33",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/mz-automation/libiec61850/security/advisories/GHSA-8mfr-hq64-9w33"
        },
        {
          "name": "https://github.com/mz-automation/libiec61850/commit/7c15310405def00cac628ebde4ce1404bfb8a411",
          "tags": [
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        {
          "name": "https://github.com/mz-automation/libiec61850/releases/tag/v1.6.2",
          "tags": [
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          "url": "https://github.com/mz-automation/libiec61850/releases/tag/v1.6.2"
        }
      ],
      "source": {
        "advisory": "GHSA-8mfr-hq64-9w33",
        "discovery": "UNKNOWN"
      },
      "title": "libIEC61850: Remote NULL dereference in MMS Read alternate-access sub-array path leads to server-side DoS"
    }
  },
  "cveMetadata": {
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    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-48741",
    "datePublished": "2026-10-16T15:45:32.680Z",
    "dateReserved": "2026-05-22T19:10:35.747Z",
    "dateUpdated": "2026-10-16T15:45:32.680Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
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      "date": "2026-10-17",
      "epss": "0.00432",
      "percentile": "0.35963"
    },
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                "vendor": "mz-automation",
                "versions": [
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                    "version": "\u003c 1.6.2"
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        "descriptions": [
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            "value": "libIEC61850 is an open-source implementation of IEC 61850 client and server protocols including MMS, GOOSE, Sampled Values, and R-Session. Prior to 1.6.2, alternateArrayAccess in src/mms/iso_mms/server/mms_read_service.c does not validate an alternate-access sub-array range when numberOfElements is greater than zero. An out-of-range MmsValue_getElement call returns NULL, and the sub-array branch passes that value to MmsValue_isDeletable, causing a NULL pointer dereference. A remote MMS Read request can therefore crash servers whose data models contain arrays, while the single-element error path handles the same invalid index safely. This issue is fixed in version 1.6.2."
          }
        ],
        "id": "CVE-2026-48741",
        "lastModified": "2026-10-16T20:04:29.760",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
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                "baseSeverity": "HIGH",
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                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
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        "published": "2026-10-16T16:18:11.943",
        "references": [
          {
            "source": "security-advisories@github.com",
            "url": "https://github.com/mz-automation/libiec61850/commit/7c15310405def00cac628ebde4ce1404bfb8a411"
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            "url": "https://github.com/mz-automation/libiec61850/security/advisories/GHSA-8mfr-hq64-9w33"
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        "vulnStatus": "Deferred",
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                "value": "CWE-476"
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            "source": "security-advisories@github.com",
            "type": "Primary"
          }
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    }
  }
}



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