Some people on r*ddit reported that their game crashes if they run it in DX11 with the latest updates: if you've previously added "-d3d11" or something similar to the launch arguments for whatever reason, try removong them (I'll write some instructions here when I get to my PC Steam library -> right click on Helldivers 2 -> "Properties..." -> General -> Launch Options (remove the dx11/d3d11 argument)).
Another thing you can try is resetting graphics settings and deleting caches - it did solve some crashes for a friend on mine though he was on Windows (again, instructions when PC
/path_to_your_steam_library/steamapps/common/Helldivers 2/-> delete vkd3d cache files;/path_to_your_steam_library/steamapps/compatdata/553850/pfx/drive_c/users/steamuser/AppData/Roaming/Arrowhead/Helldivers2/-> delete the "shader_cache" directory, if it's there (also delete "panic", "crash_data" and "dumps" if you feel like it)
)