I learned of her death when The Telegraph published her obituary last Tuesday, but it’s paywalled. I haven’t seen her death mentioned elsewhere either.
https://www.telegraph.co.uk/obituaries/2022/10/25/kathleen-b...
https://www.telegraph.co.uk/obituaries/2022/10/25/kathleen-b...
https://www.reddit.com/r/linuxmasterrace/comments/ws3kk1/kat...
https://www.reddit.com/r/linuxmasterrace/comments/ws3kk1/com...
I only knew about her passing because I happened to open the Wikipedia page this morning, and I have not seen a single news article about her passing. Even then, the Wikipedia page only says "Died August 14, 2022 (aged 100)", and the most recent information the article contains is "In May 2019, Booth was reported to be living in retirement, at the age of 97."