How can I reset Aborted_connects in MySQL?
The reason FLUSH STATUS doesn't reset this is because its a function in MySQL rather than a simple variable (code ref).

Using gdb assignment, you should be able to:

gdb -p $(pidof mysqld) -batch \
  -ex 'set variable Connection_handler_manager::m_instance-&gt;m_aborted_connects = 0L' \
  -ex continue \
  -ex quit


Otherwise you don't have much choice apart from a restart.