The Autofill feature in Google Chrome before 19.0.1084.46 does not properly restrict field values, which allows remote attackers to cause a denial of service (UI corruption) and possibly conduct spoofing attacks via vectors involving long values.
The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.