upgrade tor from v0.4.4.8-r0 to v0.4.4.9-r0 (includes denial-of-service attack fix, see below)
> Tor 0.4.4.9 fixes several security issues, including a denial-of-service attack against onion service clients, [...]
https://gitweb.torproject.org/tor.git/plain/ChangeLog
https://git.alpinelinux.org/aports/commit/?h=3.13-stable&id=1a4d9c72ba358ec1eba313fde97e9a512527200b