tl;dr:The flaw "is exploitable when large string inputs are passed to the SQLite implementations of the printf functions and when the format string contains the %Q, %q, or %w format substitution types. This is enough to cause the program to crash. We also show that if the format string contains the ! special character to enable unicode character scanning, then it is possible to achieve arbitrary code execution in the worst case, or to cause the program to hang and loop (nearly) indefinitely."