CVE-2026-64541 net/smc: fix UAF in smc_cdc_rx_handler() by pinning the socket

In the Linux kernel, the following vulnerability has been resolved: net/smc: fix UAF in smccdcrxhandler by pinning the socket smccdcrxhandler looks up the connection by token under the link group's connslock, drops the lock, and then dereferences conn and the smcsock derived from it, ending in...

kernel: net/smc: use smc_lgr_list.lock to protect smc_lgr_list.list iterate in smcr_port_add

A race condition was found in the SMC networking subsystem. Iterating over the link group list in smcrportadd without holding the lock can cause crashes when concurrent add/remove operations modify the list...