CVE-2024-5629: PyMongo Out-of-bounds Read in the bson module

The provided commit directly patches the get_value function in bson/_cbsonmodule.c. The changes involve adding stricter and more comprehensive size checks for code_size and scope_size when parsing BSON elements of type _BINARY_JAVASCRIPT_WITH_SCOPE. The vulnerability description states that a crafted payload could force the parser to deserialize unmanaged memory due to an out-of-bounds read. The patch addresses this by ensuring that the declared sizes for the JavaScript code and its scope, along with other metadata, do not exceed the available buffer (max) and are internally consistent (e.g., len < code_size or len < scope_size checks for overflow). The get_value function is where this parsing and validation occurs, making it the direct site of the vulnerability.