CVE-2026-68906

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, parseUserInformation in src/mms/iso_acse/acse.c checks len for zero before validating the negative bufPos returned by BerDecoder_decodeLength for a truncated long-form length. The continue path therefore swallows the error, reads buffer[-1], resets parsing to the beginning, and repeats the same malformed state. An unauthenticated remote peer can send a malformed AARE PDU during association to cause an infinite CPU loop under a normal allocator or a one-byte out-of-bounds read and process abort when the preceding byte is inaccessible. This issue is fixed in version 1.6.2.

CVSS

No CVSS.

References

Link	Resource
https://github.com/mz-automation/libiec61850/commit/2edf2a12bf0ced6a2ac595862e3e873814983f7f
https://github.com/mz-automation/libiec61850/releases/tag/v1.6.2
https://github.com/mz-automation/libiec61850/security/advisories/GHSA-f7xm-q62q-22cx
https://github.com/mz-automation/libiec61850/security/advisories/GHSA-f7xm-q62q-22cx

Configurations

No configuration.

History

19 Oct 2026, 13:16

Type	Values Removed	Values Added
References	~~() https://github.com/mz-automation/libiec61850/security/advisories/GHSA-f7xm-q62q-22cx -~~	() https://github.com/mz-automation/libiec61850/security/advisories/GHSA-f7xm-q62q-22cx -

16 Oct 2026, 16:20

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-16 16:20

Updated : 2026-10-19 13:16

NVD link : CVE-2026-68906

Mitre link : CVE-2026-68906

CVE.ORG link : CVE-2026-68906

JSON object : View

Products Affected

No product.

CWE

CWE-125

Out-of-bounds Read

CWE-835

Loop with Unreachable Exit Condition ('Infinite Loop')

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