CVE-2026-68908: CWE-590: Free of Memory not on the Heap in mz-automation libiec61850
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.
CVSS v3.1
Score 5.3medium
Affected software
mz-automation
libiec61850
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-07-31T21:04:04.040Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6ad24b622cdf04f65607013d
Added to database: 10/16/2026, 16:05:54 UTC
Last updated: 10/16/2026, 16:05:54 UTC
Views: 1
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