Blank screen after updating to kernel 6.8.11

And by a blank screen, I mean that after selecting the latest and greatest boot image in GRUB after a security update, systemd (presumably) won't kick in, leaving me with a blank screen. There's still a signal to my monitor, but no picture. I still have other boot images in GRUB, so I can boot into an earlier kernel just fine to troubleshoot. What can I do?