base_sock_create in drivers/isdn/mISDN/socket.c in the AF_ISDN network module in the Linux kernel through 5.3.2 does not enforce CAP_NET_RAW, which means that unprivileged users can create a raw socket, aka CID-b91ee4aa2a21. CREATE(Triage):(User=admin) [CVE-2019-17055|https://nvd.nist.gov/vuln/detail/CVE-2019-17055]
