{"schema":"threatline.record/2","record":{"id":"CVE-2026-48741","aliases":["GHSA-8mfr-hq64-9w33"],"summary":"libIEC61850: Remote NULL dereference in MMS Read alternate-access sub-array path leads to server-side DoS","details":"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.","categories":["Unclassified"],"product":"libiec61850","vendor":"mz-automation","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-48741","source_modified_at":"2026-10-21T02:22:38.275Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"libiec61850","vendor":"mz-automation","versions":[{"version":"< 1.6.2","status":"affected"}],"defaultStatus":null}],"fixed_versions":[],"cvss":7.5,"severity":"High","kev":{"listed":false},"epss":{"probability":0.00432,"percentile":0.36385,"score_date":"2026-10-23"},"published_at":"2026-10-16T15:45:32.680Z","modified_at":"2026-10-21T02:22:38.275Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-48741","fetched_at":"2026-10-23T18:45:31.882637Z","source_modified_at":"2026-10-21T02:22:38.275Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-48741","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://github.com/mz-automation/libiec61850/security/advisories/GHSA-8mfr-hq64-9w33","tags":["exploit"]},{"source":"CVE List","url":"https://github.com/mz-automation/libiec61850/commit/7c15310405def00cac628ebde4ce1404bfb8a411","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/mz-automation/libiec61850/releases/tag/v1.6.2","tags":["x_refsource_MISC"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","ssvc":{"exploitation":"poc","automatable":"yes","technical_impact":"partial","assessed_at":"2026-10-21T02:22:14.586024Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-10-21T02:22:38.275Z","content_hash":"b726bc78031627918c202488abe88bbfeb5d4bd172d9cc7642936990b5ba8b8c"}}