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  4. CVE 2026 68907 libiec61850 server side out of bounds stack read
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Back to active CVEs
High · CVSS 8.2CVE-2026-68907

libIEC61850: Server-side out-of-bounds stack read in association-specific dynamic dataset creation due to reversed StringUtils_copyStringToBuffer argumentsCVE-2026-68907

Answer in brief

CVE-2026-68907 records a High severity (CVSS 8.2) vulnerability in libIEC61850: Server-side out-of-bounds stack read in association-specific dynamic dataset creation due to reversed StringUtils_copyStringToBuffer arguments. The current sources do not mark it as known exploited. The current feed maps mz-automation/libiec61850 (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 16, 2026Updated Oct 16, 2026Source checked Oct 16, 2026First seen by HOL Oct 16, 2026Material review Oct 16, 2026
Upstream Advisory

Key facts

Risk
High · CVSS 8.2
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Available

Why this deserves its current priority

CVSS is 8.2. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps mz-automation/libiec61850 (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
mz-automation/libiec61850generic<1.6.21.6.2

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for mz-automation/libiec61850.
  2. 2Review the reported fix. Update mz-automation/libiec61850 to 1.6.2 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Oct 16, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 16, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Oct 16, 2026

Sources and claim methodology

  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
Upstream source 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, checkDataSetAccess reverses the source and destination arguments to StringUtils_copyStringToBuffer while constructing an MMS_ASSOCIATION_SPECIFIC dataset reference. The helper treats uninitialized dataSetRef[130] storage as a source string, causing strlen to read beyond the stack buffer, and then copies those bytes into the caller-owned listName buffer. A remote defineNamedVariableList request can crash servers that have dynamic dataset service enabled and a dataset access handler installed; the advisory also observes caller stack corruption but establishes denial of service as the primary impact. This issue is fixed in version 1.6.2.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • libIEC61850: Remote information disclosure in MMS file service via out-of-range initialPosition in fileOpen followed by fileReadSame mz-automation/libiec61850 package
  • libIEC61850: Remote NULL dereference in MMS Read alternate-access sub-array path leads to server-side DoSSame mz-automation/libiec61850 package
  • libIEC61850: Server-side double free in MMS ObtainFile task reuse due to stale FILE* handleSame mz-automation/libiec61850 package
  • libIEC61850: Infinite loop and out-of-bounds read in ACSE parseUserInformation when parsing a malformed AARE PDUSame mz-automation/libiec61850 package
  • libIEC61850: Oversized RptID can trigger invalid free of a stack-backed visible string in the report send pathSame mz-automation/libiec61850 package
  • gomarkdown/markdown IsSafeURL panics on short URLsAlso CWE-125

Record context

Vulnerability class
Buffer Overflow
EPSS
Not reported
CWE IDs
CWE-125, CWE-457, CWE-628
Source
CVE List V5
Source checked
Oct 16, 2026
References
3 linked sources
Open source record