{"id":"CVE-2026-68906","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-68906","generatedAt":"2026-10-28T04:14:41.620Z","title":"The continue path therefore swallows the error, reads buffer[-1], resets parsing to the beginning, and repeats the same malformed state.","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, parseUserInformation in src/mms/iso_acse/acse.c checks len for zero before validating the negative bufPos returned by BerDecoder_decodeLength for a truncated long-form length. The continue path therefore swallows the error, reads buffer[-1], resets parsing to the beginning, and repeats the same malformed state. An unauthenticated remote peer can send a malformed AARE PDU during association to cause an infinite CPU loop under a normal allocator or a one-byte out-of-bounds read and process abort when the preceding byte is inaccessible. This issue is fixed in version 1.6.2.","published":"2026-10-16T16:20:01.000Z","lastModified":"2026-10-19T13:16:58.000Z","status":"Deferred","sourceIdentifier":"security-advisories@github.com","cvss":{"version":"4.0","score":8.7,"severity":"HIGH","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M"},"cwe":["CWE-125","CWE-835"],"affected":[],"epss":{"score":0.00471,"percentile":0.4059,"date":"2026-10-27","history":[{"date":"2026-10-17","score":0.00371,"percentile":0.29512}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.47%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[{"kind":"new","label":"New CVE","at":"2026-10-16T16:20:01.000Z","detail":{"score":"8.7","severity":"HIGH","publishedAt":"2026-10-16T16:20:00.793Z"},"summary":"New CVE, high severity (CVSS 8.7)."}],"references":[{"url":"https://github.com/mz-automation/libiec61850/commit/2edf2a12bf0ced6a2ac595862e3e873814983f7f","source":"security-advisories@github.com"},{"url":"https://github.com/mz-automation/libiec61850/releases/tag/v1.6.2","source":"security-advisories@github.com"},{"url":"https://github.com/mz-automation/libiec61850/security/advisories/GHSA-f7xm-q62q-22cx","source":"security-advisories@github.com"},{"url":"https://github.com/mz-automation/libiec61850/security/advisories/GHSA-f7xm-q62q-22cx","source":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-68906","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}