The issue is related to an integer overflow in the yajl-ruby library, which leads to heap memory corruption when dealing with large inputs (~2GB). The reallocation logic at `yajl buf.c#L64` may result in the `need` 32bit integer wrapping to 0, causing a reallocation of `buf->alloc` into a small heap chunk. This vulnerability mostly impacts process availability, and maintainers believe exploitation for arbitrary code execution is unlikely.