Nvidia's board said Tuesday it hired Wachtell, Lipton, Rosen & Katz to investigate CEO Jensen Huang.
The probe covers whether company secrets or national security were compromised.
Huang admitted Sunday to having an affair.
The New York Times and Financial Times linked the woman to Chinese intelligence.
Former acting SDNY U.S. Attorney Joon H. Kim will lead the work.
Why it matters: Nvidia's independent directors are investigating the company's own CEO. The probe covers possible exposure of trade secrets and national security.
The board described the review as thorough and independent.