A Berkshire Hathaway-owned lender knowingly originated unaffordable housing loans to low-income borrowers, causing missed payments and defaults, the Consumer Financial Protection Bureau alleged in a lawsuit filed Monday.

Vanderbilt Mortgage & Finance originates mortgages for mobile homes built and sold by Vanderbilt-affiliated companies. Vanderbilt is a subsidiary of Clayton Homes, one of the nation's largest manufacturers of mobile homes and a subsidiary of Warren Buffett's Berkshire Hathaway.