The Linux 2.2.x kernel does not restrict the number of Unix domain sockets as defined by the wmem_max parameter, which allows local users to cause a denial of service by requesting a large number of sockets.
From 神龙GPT (AIGC)
Linux 2.2.x 内核并不限制由 wmem_max 参数定义的 Unix 域套接字的数量，这允许本地用户通过请求大量套接字来实现拒绝服务。