Medium 5.3Published Oct 16, 2026

CVE-2026-68908libIEC61850: Oversized RptID can trigger invalid free of a stack-backed visible string in the report send path

Updated under an hour ago (2026-10-19 06:10 UTC)

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Every CVE for mz-automation libiec61850

Exploited in the last 30 days

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: 5.3 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Weakness (CWE): CWE-590, CWE-664, CWE-763
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Deferred
Record last updated: Oct 16, 2026
First seen by InfoSec Signals: Oct 16, 2026

Affected products

Affected products

mz-automation libiec61850 mz_automation:libiec61850 (from the name)	before 1.6.2	CNA record

References

https://github.com/mz-automation/libiec61850/security/advisories/GHSA-7qg8-hm25-rv5vx-refsource-confirm
https://github.com/mz-automation/libiec61850/commit/5b2a69f44256b8548927d8afdd7ac5f5381abe1ex-refsource-misc
https://github.com/mz-automation/libiec61850/releases/tag/v1.6.2x-refsource-misc

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.