userofgos We forgot to remove the December 2025 bulletin ones from the list for the previous release but have done that now. Android 16 QPR2 contains some of the patches which are still not included in a security preview so that reduced it further compared to the initial December 2025 security bulletin update. There are some additional March 2026 patches in the security previews now though. It seems March 2026 will be much smaller than December 2025 but that's unclear.
For the first time, Android is providing standalone security bulletin patches including preview patches for a quarterly release. OEMs are now expected to ship QPR2 releases but not QPR1 or QPR3 so the mid-yearly-cycle QPR2 releases will get official standalone security patches now. We'll need to forward port to QPR1 and QPR3 release but not QPR2 where they will do it. Until Android 16 QPR3, our workload for security preview patches will be lower than it was for porting them to QPR1 but then QPR3 will be a pain for that again.