This usually happens when the memory needed for the rendering is bigger than the VRAM (if the GPU is used) and/or RAM allocable by Blender on your system. Check the followings: sometime it happens that a lot of the memory is allocated by the viewport shading mode (Eevee for viewport shading previews). You can try if this is actually allocating too much memory going into solid mode, saving your Blender file and restarting Blender. After that, without changing viewport mode, just start the rendering; consider that watching videos, playing videogames or even browsing might need memory which are not available to Blender. Try to close all software except Blender, and restart the rendering; if you are using particle hair, decrease the number of Render Amount in the Children tab of the particle hair settings, the Render steps (9 might be too high, 7-5 might be nice) and the Curves additional subdivisions (0 should be fine in 99% of the applications); if you have an Nvidia GPU, use Nvidia Studio Drivers instead of the Game Ready drivers; try to switch to CPU rendering instead of GPU. Note that, even if the error code is usually thrown as a CUDA error, it might be a combination of lack of GPU RAM and standard RAM. If the above does not help, you can try to downscale the textures you are using (see the tutorial) or simply consider an upgrade of your PC. If you are not sure, before buying new parts, you can ask for help on my Discord help.