To be clear, I'm not suggesting that you if have heard of CVEs therefor you must have heard of LPE. I'm saying if you have read many of them you would have seen these terms.

I obviously do not expect someone who has merely heard of various CVEs before to know anything about the contents of those CVEs. The other poster said they had "read many CVEs", which I took to mean they have read many CVE disclosures, where the term is extremely common. Perhaps they meant that they've read about CVEs, in which case I can see why the term would not be on their radar.