CVE-2026-68908
MEDIUMDescription
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, Reporting_RCBWriteAccessHandler accepts an RptID longer than 129 bytes in the report-control-block write path. When GI later causes sendNextReportEntrySegment to serialize the report, the function wraps rptIdBuf[130] as a temporary MmsValue and passes it to MmsValue_setVisibleString. The setter's resize path frees the stack-backed buffer, allowing a remote client to trigger an invalid free and server crash by writing the oversized RptID and then generating a report. This issue is fixed in version 1.6.2.
How to fix
No published remediation has been found for this vulnerability's affected products yet.
Mitigation guidance may be in the linked vendor advisories in the References section below.
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CVSS v3 Vector
Exploitability
Impact
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Exploit Intelligence
Low risk: more likely to be exploited than 38% of all known CVEs.
References
Related Vulnerabilities
Other CWE-590 vulnerabilities, ordered by exploit likelihood. View all
| CVE | Severity | CVSS | EPSS | Exploited | Fix |
|---|---|---|---|---|---|
| CVE-2020-6016 | Critical | 9.8 | 6.0% | - | Fix |
| CVE-2022-31625 | High | 8.1 | 3.8% | - | Fix |
| CVE-2021-42377 | Critical | 9.8 | 3.6% | - | Fix |
| CVE-2022-31627 | High | 7.7 | 2.1% | - | Fix |
| CVE-2023-25565 | High | 7.5 | 1.1% | - | Fix |
| CVE-2023-42459 | High | 8.6 | 1.0% | - | Fix |
Common questions
How do I fix CVE-2026-68908?
No published fix for CVE-2026-68908 has been found yet. Check the linked vendor advisories for guidance as it becomes available.
Is CVE-2026-68908 being actively exploited?
Not that we know of. CVE-2026-68908 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.45% is the estimated probability that it will be exploited in the next 30 days. That is higher than 38% of all scored CVEs.
How severe is CVE-2026-68908?
CVE-2026-68908 has a CVSS v3 base score of 5.3, rated medium. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.
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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-10-16.