libIEC61850: Server-side double free in MMS ObtainFile task reuse due to stale FILE* handle

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-57446
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-16 16:18:44 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. 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.

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-415 | CWE-664 | CWE-672 | CWE-415 CWE-415: Double Free | CWE-664 CWE-664: Improper Control of a Resource Through its Lifetime | CWE-672 CWE-672: Operation on a Resource after Expiration or Release

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 >= 1.6.1, < 1.6.2 Not specified

References

ReferenceSourceLinkTags
github.com/mz-automation/libiec61850/security/advisories/GHSA-cxgr-7v9h-... [email protected] github.com
github.com/mz-automation/libiec61850/releases/tag/v1.6.2 [email protected] github.com
github.com/mz-automation/libiec61850/commit/d86b4a9c7a903641819235e1678b... [email protected] github.com
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