libIEC61850: Server-side double free in MMS ObtainFile task reuse due to stale FILE* handle

{
  "id": "9700816dbd69f80498cd72f74084a5597dd9b730f10b89b148eef520b2388e57",
  "url": "https://www.cve.org/CVERecord?id=CVE-2026-57446",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "libIEC61850: Server-side double free in MMS ObtainFile task reuse due to stale FILE* handle",
    "summary": "libIEC61850 is an open-source implementation of IEC 61850 client and server protocols including MMS, GOOSE, Sampled Values, and R-Session. From 1.6.1 until 1.6.2, a successful MMS ObtainFile operation closes MmsObtainFileTask::fileHandle but leaves the stale non-NULL value in a task marked MMS_FILE_UPLOAD_STATE_NOT_USED. If a later ObtainFile request reuses that task and destination creation fails, MMS_FILE_UPLOAD_STATE_SEND_OBTAIN_FILE_ERROR_DESTINATION cleanup closes the stale FILE object again. Servers with the MMS file service and ObtainFile enabled can therefore be crashed remotely by the success-then-failure request sequence. This issue is fixed in version 1.6.2.",
    "evidence": "cve:CVE-2026-57446",
    "products": [
      {
        "name": {
          "value": "libiec61850",
          "evidence": "/containers/cna/affected/0/product"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": []
      }
    ],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-57446",
      "aliases": [
        "CVE-2026-57446"
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "scope": "UNCHANGED",
            "version": "3.1",
            "baseScore": 5.3,
            "attackVector": "NETWORK",
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
            "integrityImpact": "NONE",
            "userInteraction": "NONE",
            "attackComplexity": "LOW",
            "availabilityImpact": "LOW",
            "privilegesRequired": "NONE",
            "confidentialityImpact": "NONE"
          }
        }
      ],
      "affected": [
        {
          "vendor": "mz-automation",
          "product": "libiec61850",
          "versions": [
            {
              "status": "affected",
              "version": ">= 1.6.1, < 1.6.2"
            }
          ]
        }
      ],
      "modified": "2026-10-28T18:23:51.341Z",
      "provider": "cve",
      "references": [
        "https://github.com/mz-automation/libiec61850/security/advisories/GHSA-cxgr-7v9h-fj9p",
        "https://github.com/mz-automation/libiec61850/commit/d86b4a9c7a903641819235e1678b18901518f3cd",
        "https://github.com/mz-automation/libiec61850/releases/tag/v1.6.2"
      ],
      "provider_metadata": {
        "adp": [
          {
            "title": "CISA ADP Vulnrichment",
            "metrics": [
              {
                "other": {
                  "type": "ssvc",
                  "content": {
                    "id": "CVE-2026-57446",
                    "role": "CISA Coordinator",
                    "options": [
                      {
                        "Exploitation": "poc"
                      },
                      {
                        "Automatable": "yes"
                      },
                      {
                        "Technical Impact": "partial"
                      }
                    ],
                    "version": "2.0.3",
                    "timestamp": "2026-10-28T18:23:43.634635Z"
                  }
                }
              }
            ],
            "references": [
              {
                "url": "https://github.com/mz-automation/libiec61850/security/advisories/GHSA-cxgr-7v9h-fj9p",
                "tags": [
                  "exploit"
                ]
              }
            ],
            "providerMetadata": {
              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "shortName": "CISA-ADP",
              "dateUpdated": "2026-10-28T18:23:51.341Z"
            }
          }
        ],
        "cna": {
          "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
          "shortName": "GitHub_M",
          "dateUpdated": "2026-10-16T15:46:33.549Z"
        }
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-57446",
        "evidence": "/cveMetadata/cveId"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/containers/cna/metrics"
  },
  "source_id": "core-cve",
  "document_id": 472580,
  "published_at": "2026-10-16T15:46:33.549+00:00"
}