Isn't "tainted" in the Linux kernel used to flag the presence of binary blobs? (and nothing to do with licensing) All binary blobs in the Linux kernel aren't a

Isn't "tainted" in the Linux kernel used to flag the presence of binary blobs? (and nothing to do with licensing) All binary blobs in the Linux kernel aren't automatically illegal according to the GPL, right? Binary blob kernel modules, in fact, have restricted access to the kernel frameworks (cannot access/use GPL symbols).