CVE-2026-68907 Details
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.
A stack-based buffer overflow vulnerability has been identified in the libIEC61850 library, specifically within the MMS server component that handles association-specific named variable lists. This issue arises from the checkDataSetAccess function, which reverses the source and destination arguments when constructing a dataset reference. The flaw allows for an out-of-bounds stack read, stack corruption, and a subsequent denial-of-service condition on the server.
Users are advised to update to libIEC61850 version 1.6.2, where this vulnerability has been fixed.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Oct 16, 2026CISA-ADP
Assessed Oct 16, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/mz-automation/libiec61850/commit/062062daf4cb50c7aa76e01d6fb4d58fc9278a7d | [email protected] | Source CodeVendor |
| https://github.com/mz-automation/libiec61850/releases/tag/v1.6.2 | [email protected] | Release NotesVendor |
| https://github.com/mz-automation/libiec61850/security/advisories/GHSA-7v2x-39mw-2979 | [email protected] | AdvisoryExploitRemedyTechnical AnalysisVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-125 | Out-of-bounds Read | [email protected] |
| CWE-457 | Use of Uninitialized Variable | [email protected] |
| CWE-628 | Function Call with Incorrectly Specified Arguments | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| libIEC61850 | < 1.6.2 (semver) |
CPE
Remediation
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Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Oct 16, 2026 | CVE Modified | CISA-ADP |
| Oct 16, 2026 | New CVE Received | [email protected] |