Almost all bugs can be a “security” issue.
As both a Linux user and a software developer, I’ve followed the Linux Kernel development process and talks over the years. Recently, Greg Kroah-Hartman gave a talk on security at Kernel Recipes 2023 which I think is worth checking out. Most of the information is not new to me, but their approach to handling “security” bugs is somewhat novel in the industry, and I would argue is a good model to consider using across the board.
If you would prefer to browse the slides instead of (or in addition to) the video, check out Greg’s security-stuff slide deck.