I get mad triggered by software license violation discussions.
Please for the love of all that the FSF thinks is holy - just file a damn lawsuit if you are telling me they are violating the law. State your claim and have a court sort it out.
It costs hundreds of dollars. For a medical device? Seems like a good deal.
In what planet does a lawsuit cost hundreds of dollars?
The OP almost certainly isn’t a copyright holder for the Linux kernel. They probably would have said if they were.