{"id":"CVE-2026-68907","summary":"libIEC61850: Server-side out-of-bounds stack read in association-specific dynamic dataset creation due to reversed StringUtils_copyStringToBuffer arguments","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, checkDataSetAccess reverses the source and destination arguments to StringUtils_copyStringToBuffer while constructing an MMS_ASSOCIATION_SPECIFIC dataset reference. The helper treats uninitialized dataSetRef[130] storage as a source string, causing strlen to read beyond the stack buffer, and then copies those bytes into the caller-owned listName buffer. A remote defineNamedVariableList request can crash servers that have dynamic dataset service enabled and a dataset access handler installed; the advisory also observes caller stack corruption but establishes denial of service as the primary impact. This issue is fixed in version 1.6.2.","aliases":["CVE-2026-18583","GHSA-7v2x-39mw-2979"],"modified":"2026-10-17T02:56:02.348472477Z","published":"2026-10-16T15:48:33.080Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68907.json","cna_assigner":"GitHub_M","cwe_ids":["CWE-125","CWE-457","CWE-628"]},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68907.json"},{"type":"FIX","url":"https://github.com/mz-automation/libiec61850/commit/062062daf4cb50c7aa76e01d6fb4d58fc9278a7d"},{"type":"WEB","url":"https://github.com/mz-automation/libiec61850/releases/tag/v1.6.2"},{"type":"ADVISORY","url":"https://github.com/mz-automation/libiec61850/security/advisories/GHSA-7v2x-39mw-2979"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-68907"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/mz-automation/libiec61850","events":[{"introduced":"0"},{"fixed":"f0f797bf955da763353f7081c892a1ff6b55e5a1"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"fixed":"1.6.2"}],"source":"AFFECTED_FIELD"}}],"versions":["v1.6.1","v1.6.0","v1.4.1","v1.4.0","v1.2.0","v1.3.0","v1.2.2","v1.2.1","v1.1","v1.0.1","v1.0.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-68907.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"}]}