Arsenal are now weighing up options at full-back this summer with Sporting CP's Ivan Fresneda among those under consideration.
White sustained the injury against West Ham in a result that cost him one of the biggest occasions of his career. Mikel Arteta was guarded immediately after the game but made clear his concerns.
"We don't know but it doesn't look good at all," Arteta said at the time. "He needs some further testing tomorrow, probably, and then we will know."
A week later, Arteta confirmed White would miss an extended period.
"We have to wait and see. It looks like a long-term injury," Arteta said. "At the moment, the focus is can we have him back and be available for Arsenal. That's not going to happen in many, many weeks."
White has since posted photos to his Instagram showing him running as he prepares for the new season, offering supporters a first sign of meaningful progress. He is expected back at Arsenal for pre-season in mid-July, which will provide an early indication of whether he is ready to integrate into training.
The injury has added urgency to Arsenal's full-back planning. Football.london reports the club are looking at options in the position during the window, with Fresneda among those appreciated by the club. Jurrien Timber's own injury issues, which forced the Netherlands international out of their World Cup squad before it began, have further exposed the department.
White's update is significant on two fronts — it signals to Arsenal that he is progressing on schedule, while also giving any potential suitors a clearer picture of his availability heading into the window.