I take no credit for the actual exploit but wanted to explain how to take advantage of exploit if you do not have access to a laptop to run dev manger. Original guide taken from https://gist.github.com/throwaway96/e811b0f7cc2a705a5a476a8dfa45e09f#file-crashd-md
This guide explains how to root an LG TV using a vulnerability in crashd using an Android phone. It works on webOS 4 and above and is currently unpatched (as of 2023-10-03). This means that as long as your TV is running at least webOS 4.0 (i.e., it is a 2018 model or newer), it should be vulnerable. It is recommended that anyone attempting this procedure do their own research in order to understand how the process works. In general, unless you understand exactly why you're doing something, you shouldn't do it. While there is relatively low risk of permananent damage to your TV, you're ultimately responsible if anything goes wrong.