CVE-2025-39955 tcp: Clear tcp_sk(sk)->fastopen_rsk in tcp_disconnect().

In the Linux kernel, the following vulnerability has been resolved: tcp: Clear tcpsksk-fastopenrsk in tcpdisconnect. syzbot reported the splat below where a socket had tcpsksk-fastopenrsk in the TCPESTABLISHED state. 0 syzbot reused the server-side TCP Fast Open socket as a new client before the...

DNS cache servers resource consumption by TCP SYN_SENT states

Overview DNS cache servers consume huge resources for communication with DNS authoritative servers in the following situation. 1 a user sends a query to the DNS cache server 2 the DNS cache server sends a UDP query to an authoritative server 3 when the authoritative server finds that the reply...