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.
Metrics
Affected Vendors & Products
References
History
Fri, 23 Oct 2026 11:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Mz-automation
Mz-automation libiec61850 |
|
| Vendors & Products |
Mz-automation
Mz-automation libiec61850 |
Wed, 21 Oct 2026 03:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
|
Fri, 16 Oct 2026 16:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| 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, 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. | |
| Title | libIEC61850: Remote NULL dereference in MMS Read alternate-access sub-array path leads to server-side DoS | |
| Weaknesses | CWE-129 CWE-252 CWE-476 CWE-754 |
|
| References |
| |
| Metrics |
cvssV3_1
|
Status: PUBLISHED
Assigner: GitHub_M
Published: 2026-10-16T15:45:32.680Z
Updated: 2026-10-21T02:22:38.275Z
Reserved: 2026-05-22T19:10:35.747Z
Link: CVE-2026-48741
Updated: 2026-10-21T02:22:33.997Z
Status : Deferred
Published: 2026-10-16T16:18:11.943
Modified: 2026-10-21T03:17:19.473
Link: CVE-2026-48741
No data.