Possible Heap-based Buffer Overflow. Reference: https://huntr.dev/bounties/ac5d7005-07c6-4a0a-b251-ba9cdbf6738b https://github.com/vim/vim/commit/5f25c3855071bd7e26255c68bf458b1b5cf92f39
Created vim tracking bugs for this issue: Affects: fedora-all [bug 2039848]
This flaw does not affect vim versions prior to 8.2. Since it is a 1 byte out of bound read, it would not be sufficient to crash vim (except if recompiled with an address sanitizer)