{"id":"CVE-2026-68906","revision":"02f02d3469d040b0b86e5779a009bd0c","records":[{"revision":"02f02d3469d040b0b86e5779a009bd0c","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-68906","aliases":[],"title":"libIEC61850: Infinite loop and out-of-bounds read in ACSE parseUserInformation when parsing a malformed AARE PDU","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.","state":0,"publishedAt":"2026-10-16T15:49:32.595+00:00","modifiedAt":"2026-10-19T12:33:42.207+00:00","affected":[{"ecosystem":"Vendor product","name":"libiec61850","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"mz-automation\",\n                    \"product\": \"libiec61850\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< 1.6.2\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","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","score":8.7,"severity":"HIGH"}],"references":["https://github.com/mz-automation/libiec61850/security/advisories/GHSA-f7xm-q62q-22cx","https://github.com/mz-automation/libiec61850/commit/2edf2a12bf0ced6a2ac595862e3e873814983f7f","https://github.com/mz-automation/libiec61850/releases/tag/v1.6.2"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-68906","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-68906","identifiers":["CVE-2026-68906"]},"retained":false,"historicalAffected":[]}],"coverage":[]}