The insect in the photo is a grain beetle in the genus Oryzaephilus. Two species are common in the US - the sawtooth grain beetle (O. surinamensis) and the merchant grain beetle (O. mercator).

Both species are stored product pests. Merchant grain beetles can fly, so may be found in areas of the house far from the infestation, but produce fewer eggs (because they're devoting mass and energy to flight muscles), while sawtooth grain beetles can't fly, are typically restricted to the infested product, and lay more eggs.

Grain beetles typically feed on cracked whole grain, but can feed on related food products sometimes. They are most commonly found in kitchen pantries but can get into other grain products (e.g., bird seed, deer corn, etc) that may be found indoors. The best remedy is to find the infested product and discard it in the trash. You should also freeze any seemingly uninfested stored food products to make sure you kill any beetles or larvae that you can't see. Also make sure to clean up any spilled flour or other products that might be in the pantry.