This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of SQLite. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.
The specific flaw exists within the handling of the fts3_tokenizer function. The issue lies in the optional second argument which is expected to be a pointer into a structure. An attacker can leverage this vulnerability to achieve code execution under the context of the current process.