On February 22, 2022, WordPress 5.9.1 was released. This is a maintenance release that fixes 82 bugs in both the kernel and block editor. For optimal use of WordPress 5.9, we recommend that you apply this update.
You can start updating WordPress 5.9.1 via the backend in Dashboard › Updates or by downloading the file from WordPress.org. If your site supports automatic background updates, you may already have the new version installed.
The next major release will be version 6.0. Details of the changes can be found in the full changelog on Trac or on the 5.9.1 HelpHub page.
The 5.9.1 release was managed by Jb Audras and George Mamadashvili. Special thanks to @sergeybiryukov for overseeing the whole thing.
Also, a big thanks to everyone else who helped with the release of WordPress 5.9.1:
Albert Juhe Louveras, Alex Lande, Alexsteen, Andre, Anton Vlasenko, Ari Stathopoulos, ArteMa, Ben Dwyer, BlogAid, Caroline Niemark, Channing Ritter, Chris Van Patten, Colin Stewart, Daniel Richards, David Binovec, David Smith, Dion Hulse, Dominic Schilling, Eddie, Ella van Durpe, Eric, Fabian Kegi, Flinim Aso, gadhiyaravi, George Hotelling, George Mamadashvili, glendaviesnz, Greg Ziolkowski, ianatkin, Ian Belanger, iron programmer, itamoreh, Jb Audras, Jeff Ong, Joremy Herve, Joen A, John Blackbourn, Jonathan Derosier, Jorge Costa, Juliette Reynders Folmer, KafleG, Kapil Paul, Kjell Reigstad, linux4me2, Lukman Nakib, manfkarlo, Marius LJ, mugol, nidhidhandhukia, Nick Tsekouras, Omar Alshaker, Pakol Alshaker, , Paul Byrne, Pavlo, Petar Ratkovic, Peter Wilson, Petter Volbo Johnsgaard, Phil Johnston, Piotrek Boniu, ravipatel, Riad Benguella, Robert Anderson, Rolf Sieber, Sergej Biryukov, Stacimc, Steven Bernhardt, Sven Wagener s, From Team Staatic Tonya Mork, webcommsat AbhaNonStopNewsUK, WebMan design | Oliver Juhas, wpcharged, wpsoul, Yunus Ertuğrul and Rafi Ahmed.
Thanks also to @estelaris, @pbiron, @ironprogrammer, @bph, @abhanonstopnewsuk and @threadi for their help testing the release package.