I must be missing something, I rendered a test scene from Blender, a 16bit png, but when I import it into Krita 2.9.1 the images gamma is too bright.
Everything is set to sRGB as far as I can tell, so all should work fine.

I've tried the same image in Gimp (albeit converted I guess), Photoshop and RawTherepee, but all is well.

I was asked to file a bug by TheraHedwig, who said he is aware of the issue and knows the fix.

Good luck :)

Reproducible: Always

Steps to Reproduce:
1. Import 16Bit Image (in test from blender)
2. 
3.

Actual Results:  
Krita displays image wrong, too bright, gamma issue.

Expected Results:  
The image should be calibrated to display normally.