{"id":"CVE-2026-68906","published":"2026-10-16T16:20:00.793","lastModified":"2026-10-16T20:04:29.760","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.","cvssScore":null,"cvssSeverity":null,"cvssVector":null,"cwes":["CWE-125","CWE-835"],"vendors":[],"products":[],"references":[{"url":"https://github.com/mz-automation/libiec61850/commit/2edf2a12bf0ced6a2ac595862e3e873814983f7f","tags":[]},{"url":"https://github.com/mz-automation/libiec61850/releases/tag/v1.6.2","tags":[]},{"url":"https://github.com/mz-automation/libiec61850/security/advisories/GHSA-f7xm-q62q-22cx","tags":[]}],"exploitRefs":[{"url":"https://github.com/mz-automation/libiec61850/commit/2edf2a12bf0ced6a2ac595862e3e873814983f7f","tags":[]},{"url":"https://github.com/mz-automation/libiec61850/releases/tag/v1.6.2","tags":[]},{"url":"https://github.com/mz-automation/libiec61850/security/advisories/GHSA-f7xm-q62q-22cx","tags":[]}],"hasPoc":true,"ai":null}