CVE-2026-68907

CVE-2026-68907 · libIEC61850: Server-side out-of-bounds stack read in association-specific dynamic dataset creation due to reversed StringUtils_copyStringToBuffer arguments

This page contains facts from public vulnerability sources. Check the original advisory before updating.

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 8.2 · High · EPSS 0.4%

Published

2026-10-16T15:48:33.080Z

Updated

2026-10-16T17:05:59.282Z

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