How old is the house? If it is just a few years old, then more cracks can be expected.
If it is 50 years old, and one crack is it, then you may not have too much of a problem.
The dry weather this year was really hard on foundations.
To fix it right, you would need to dig down, reinforce the area, bolt steel to stabilize the crack, or pour another wall beside the crack. Not cheap.
I would also want to run a drain tile to the crack area so no water pressure would ever be against that area.
Good luck, Gene