CVE-2026-48741
highlibIEC61850 is an open-source implementation of IEC 61850 client and server protocols including MMS, GOOSE, Sampled Values, and R-Session.
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, alternateArrayAccess in src/mms/iso_mms/server/mms_read_service.c does not validate an alternate-access sub-array range when numberOfElements is greater than zero. An out-of-range MmsValue_getElement call returns NULL, and the sub-array branch passes that value to MmsValue_isDeletable, causing a NULL pointer dereference. A remote MMS Read request can therefore crash servers whose data models contain arrays, while the single-element error path handles the same invalid index safely. This issue is fixed in version 1.6.2.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Affected products
Not reported by the source (unknown — not "none").
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://github.com/mz-automation/libiec61850/commit/7c15310405def00cac628ebde4ce1404bfb8a4... security-advisories@github.com
- https://github.com/mz-automation/libiec61850/releases/tag/v1.6.2 security-advisories@github.com
- https://github.com/mz-automation/libiec61850/security/advisories/GHSA-8mfr-hq64-9w33 security-advisories@github.com
- https://github.com/mz-automation/libiec61850/security/advisories/GHSA-8mfr-hq64-9w33 134c704f-9b21-4f2e-91b3-4a467353bcc0