That’s one kind, and Rust’s “ownership” concept does mean there’s built-in compile time checks to prevent dangling pointers or unreachable memory. But there’s also just never de-allocating stuff you allocated even though it’s still reachable. Like you could just make a loop that allocates memory and never stops and that’s a memory leak, or more generally a “resource leak”, if you prefer.

Rust is really good at keeping you from having a reference to something that you think is valid but it turns out it got mutated way down in some class hierarchy and now it’s dead, so you have a null pointer or you double free, or whatever. But it can’t stop the case where your code is technically valid but the resource leak is caused by bad “logic” in your design, if that makes sense.