The dissect_cmstatus_tlv function in plugins/docsis/packet-cmstatus.c in the DOCSIS CM-STATUS dissector in Wireshark 1.6.x before 1.6.13 and 1.8.x before 1.8.5 uses an incorrect data type for a position variable, which allows remote attackers to cause a denial of service (infinite loop) via a malformed packet.
The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.