An issue was discovered in the Linux kernel through 5.11.6. fastrpc_internal_invoke in drivers/misc/fastrpc.c does not prevent user applications from sending kernel RPC messages, aka CID-20c40794eb85. This is a related issue to CVE-2019-2308. CREATE(Triage):(User=admin) [CVE-2021-28375|https://nvd.nist.gov/vuln/detail/CVE-2021-28375]