CVE-2026-57446
CVE-2026-57446 · libIEC61850: Server-side double free in MMS ObtainFile task reuse due to stale FILE* handle
This page contains facts from public vulnerability sources. Check the original advisory before updating.
libIEC61850 is an open-source implementation of IEC 61850 client and server protocols including MMS, GOOSE, Sampled Values, and R-Session. From 1.6.1 until 1.6.2, a successful MMS ObtainFile operation closes MmsObtainFileTask::fileHandle but leaves the stale non-NULL value in a task marked MMS_FILE_UPLOAD_STATE_NOT_USED. If a later ObtainFile request reuses that task and destination creation fails, MMS_FILE_UPLOAD_STATE_SEND_OBTAIN_FILE_ERROR_DESTINATION cleanup closes the stale FILE object again. Servers with the MMS file service and ObtainFile enabled can therefore be crashed remotely by the success-then-failure request sequence. This issue is fixed in version 1.6.2.
CVSS 5.3 · Medium · EPSS 0.4%
- Published
- Updated
Affected products and versions
libiec61850
- Versions
- >= 1.6.1, < 1.6.2: Affected
No fix published