Out-of-bounds Read in GitHub repository vim/vim prior to 9.0.1143.
http://seclists.org/fulldisclosure/2023/Mar/17
https://github.com/vim/vim/commit/7b17eb4b063a234376c1ec909ee293e42cff290c
https://huntr.dev/bounties/5e6f325c-ba54-4bf0-b050-dca048fd3fd9