CVE-2026-68907: CWE-125: Out-of-bounds Read 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, 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.
CVSS v4.0
Score 8.2high
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
- 4.0
- State
- PUBLISHED
Threat ID: 6ad24b622cdf04f65607013c
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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