Galoots

If you're concerned, you can buy a oily rag waste can, who's
description specifically mentions linseed oil:

https://www.justrite.com/09100-oily-waste-can-6-gallon-foot-operated-
self-closing-cover-red.html">https://www.justrite.com/09100-oily-waste-can-6
-gallon-foot-operated-self-closing-cover-red.html

"Rags and cloths soaked with solvents, thinners, linseed oil,
combustible adhesives and other flammable liquids present a serious
fire risk when improperly discarded. Lid opens to no more than 60
degrees and stays closed when not in use, isolating contents from fire
sources and limiting oxygen to virtually eliminate the risk of
spontaneous combustion. Round construction and elevated base allow
circulation of air around can to disperse heat and reduce moisture
build-up and rusting. Durable steel construction with a powder-coat
finish provides chemical resistance."

It is OSHA compliant (Occupational Safety and Health Administration is
an agency of the United States). Amazon sells them for cheaper than
the above link.

I own one, and don't work for the company. And as my wife will attest
to, I barely work at all.

Thanks,
Chris