Updated nonfree firmwares fixees various issues, adds new / improved hardware support and fixes at least the following security issue:
An issue was discovered on Broadcom Wi-Fi client devices. Specifically timed and handcrafted traffic can cause internal errors (related to state transitions) in a WLAN device that lead to improper layer 2 Wi-Fi encryption with a consequent possibility of information disclosure over the air for a discrete set of traffic (CVE-2019-15126).
Full list of updates:
kernel-firmware-nonfree:
iwlwifi-firmware:
rtlwifi-firmware: