Vulnerabilities in the algorithms used by Fuchsia to populate network protocol header fields, specifically the TCP ISN, TCP timestamp, TCP and UDP source ports, and IPv4/IPv6 fragment ID allow for these values to be guessed under circumstances
https://fuchsia.googlesource.com/fuchsia/+/a3c17a4d6b3140f9175d6cf6ac4eb4e775f8dea8
https://fuchsia.googlesource.com/fuchsia/+/40e7fbcdcd013441daf4492f1ead349a9e5b80dc