Looks like Apple just released the fix for a security vulnerability in AirPods that I've found a while ago: https://support.apple.com/en-us/HT214111

If you're interested in a few more details, I've blogged about it now: https://blogs.gnome.org/jdressler/2024/06/26/do-a-firmware-update-for-your-airpods-now/