This morning I just installed the fixed Slackware Packages for cups. It became available on Oct 1 18:00 UTC:
>(* Security fix *)
>patches/packages/cups-filters-1.28.17-x86_64-2_slack15.0.txz: Rebuilt. Mitigate security issue that could lead to a denial of service or the execution of arbitrary code. Rebuilt with --with-browseremoteprotocols=none to disable incoming connections, since this daemon has been shown to be insecure. If you actually use cups-browsed, be sure to install the new /etc/cups/cups-browsed.conf.new containing this line:
>BrowseRemoteProtocols none
>For more information, see: