To be fair, that affected a bunch of other languages as well so Rust is in (questionably) good company there.
I feel the need to keep your Rust install up to date might arguably be more ecosystem-dependent than anything to do with Rust itself. If stuff you're using requires a newer rustc then you don't have much choice but to upgrade, but if you're fine using something older and/or your dependencies keep support for older versions of rustc then you can probably get away with a lot fewer updates.
> This one was fun too: https://blog.rust-lang.org/2024/04/09/cve-2024-24576.html
To be fair, that affected a bunch of other languages as well so Rust is in (questionably) good company there.
I feel the need to keep your Rust install up to date might arguably be more ecosystem-dependent than anything to do with Rust itself. If stuff you're using requires a newer rustc then you don't have much choice but to upgrade, but if you're fine using something older and/or your dependencies keep support for older versions of rustc then you can probably get away with a lot fewer updates.