{"schema":"threatline.record/2","record":{"id":"CVE-2026-68906","aliases":["GHSA-f7xm-q62q-22cx"],"summary":"libIEC61850: Infinite loop and out-of-bounds read in ACSE parseUserInformation when parsing a malformed AARE PDU","details":"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.","categories":["Unclassified"],"product":"libiec61850","vendor":"mz-automation","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-68906","source_modified_at":"2026-10-19T12:33:42.207Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"libiec61850","vendor":"mz-automation","versions":[{"version":"< 1.6.2","status":"affected"}],"defaultStatus":null}],"fixed_versions":[],"cvss":8.7,"severity":"High","kev":{"listed":false},"epss":{"probability":0.00371,"percentile":0.29881,"score_date":"2026-10-23"},"published_at":"2026-10-16T15:49:32.595Z","modified_at":"2026-10-19T12:33:42.207Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-68906","fetched_at":"2026-10-23T18:45:31.882637Z","source_modified_at":"2026-10-19T12:33:42.207Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-68906","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://github.com/mz-automation/libiec61850/security/advisories/GHSA-f7xm-q62q-22cx","tags":["exploit"]},{"source":"CVE List","url":"https://github.com/mz-automation/libiec61850/commit/2edf2a12bf0ced6a2ac595862e3e873814983f7f","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/mz-automation/libiec61850/releases/tag/v1.6.2","tags":["x_refsource_MISC"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","ssvc":{"exploitation":"poc","automatable":"yes","technical_impact":"partial","assessed_at":"2026-10-19T12:33:28.090999Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-10-19T12:33:42.207Z","content_hash":"3f27f70e835e6c99c56707731ef6050b382d404c7ef3167be089d41dc2db3941"}}