TCP checksum and TLS checksum&#x2F;macing both have use case. Not every protocol built on TCP supports TLS. If TCP checksum is broken, we have to fix it. So I agree with below delusional is too strong. If a simple checksum is buggy, how can I trust anything about said TCP protocol implementation? How can you reassure other data integrity implementation isn&#x27;t buggy? This bug isn&#x27;t really about whether TCP checksum is weak or not, rather, just a bug which I suppose most people ignore.