UNIX: out-of-bound messages

configname: CONFIG_AF_UNIX_OOB

Linux Kernel Configuration
└─>Networking support
└─>Networking options
└─>UNIX: out-of-bound messages
In linux kernel since version 4.14.326 (release Date: 2023-09-23)  
Support for MSG_OOB in UNIX domain sockets. If unsure, say Y.