{"id":"CVE-2026-48741","revision":"1c30f40777d14db4ae04055ec3385bd2","records":[{"revision":"1c30f40777d14db4ae04055ec3385bd2","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-48741","aliases":[],"title":"libIEC61850: Remote NULL dereference in MMS Read alternate-access sub-array path leads to server-side DoS","description":"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.","state":0,"publishedAt":"2026-10-16T15:45:32.68+00:00","modifiedAt":"2026-10-21T02:22:38.275+00:00","affected":[{"ecosystem":"Vendor product","name":"libiec61850","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"mz-automation\",\n                    \"product\": \"libiec61850\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< 1.6.2\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5,"severity":"HIGH"}],"references":["https://github.com/mz-automation/libiec61850/security/advisories/GHSA-8mfr-hq64-9w33","https://github.com/mz-automation/libiec61850/commit/7c15310405def00cac628ebde4ce1404bfb8a411","https://github.com/mz-automation/libiec61850/releases/tag/v1.6.2"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-48741","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-48741","identifiers":["CVE-2026-48741"]},"retained":false,"historicalAffected":[]}],"coverage":[]}