{"id":"CVE-2026-68908","published":"2026-10-16T16:20:01.140","lastModified":"2026-10-16T20:04:29.760","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, Reporting_RCBWriteAccessHandler accepts an RptID longer than 129 bytes in the report-control-block write path. When GI later causes sendNextReportEntrySegment to serialize the report, the function wraps rptIdBuf[130] as a temporary MmsValue and passes it to MmsValue_setVisibleString. The setter's resize path frees the stack-backed buffer, allowing a remote client to trigger an invalid free and server crash by writing the oversized RptID and then generating a report. This issue is fixed in version 1.6.2.","cvssScore":5.3,"cvssSeverity":"MEDIUM","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","cwes":["CWE-590","CWE-664","CWE-763"],"vendors":[],"products":[],"references":[{"url":"https://github.com/mz-automation/libiec61850/commit/5b2a69f44256b8548927d8afdd7ac5f5381abe1e","tags":[]},{"url":"https://github.com/mz-automation/libiec61850/releases/tag/v1.6.2","tags":[]},{"url":"https://github.com/mz-automation/libiec61850/security/advisories/GHSA-7qg8-hm25-rv5v","tags":[]},{"url":"https://github.com/mz-automation/libiec61850/security/advisories/GHSA-7qg8-hm25-rv5v","tags":[]}],"exploitRefs":[{"url":"https://github.com/mz-automation/libiec61850/commit/5b2a69f44256b8548927d8afdd7ac5f5381abe1e","tags":[]},{"url":"https://github.com/mz-automation/libiec61850/releases/tag/v1.6.2","tags":[]},{"url":"https://github.com/mz-automation/libiec61850/security/advisories/GHSA-7qg8-hm25-rv5v","tags":[]},{"url":"https://github.com/mz-automation/libiec61850/security/advisories/GHSA-7qg8-hm25-rv5v","tags":[]}],"hasPoc":true,"ai":null}