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

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-68908
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-16 16:20:01 UTC
Updated2026-10-16 20:04:29 UTC
DescriptionlibIEC61850 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.

Risk And Classification

Primary CVSS: v3.1 5.3 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Problem Types: CWE-590 | CWE-664 | CWE-763 | CWE-590 CWE-590: Free of Memory not on the Heap | CWE-664 CWE-664: Improper Control of a Resource Through its Lifetime | CWE-763 CWE-763: Release of Invalid Pointer or Reference

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary5.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
3.1CNADECLARED5.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
Low

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Mz-automation Libiec61850 affected < 1.6.2 Not specified

References

ReferenceSourceLinkTags
github.com/mz-automation/libiec61850/commit/5b2a69f44256b8548927d8afdd7a... [email protected] github.com
github.com/mz-automation/libiec61850/releases/tag/v1.6.2 [email protected] github.com
github.com/mz-automation/libiec61850/security/advisories/GHSA-7qg8-hm25-... 134c704f-9b21-4f2e-91b3-4a467353bcc0 github.com
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