Good morning. Microsoft says Chinese hackers exploited flaws in its software. Meme stock fever is spreading like it’s 2021. And heavy metal icon Ozzy Osbourne dies at age 76. Listen to the day’s top stories.

The company uncovers evidence that at least three China-based hacking groups are abusing the zero-day flaw in SharePoint software to access servers.

Two Chinese nation-state actors and one China-based threat actor have tried to exploit the vulnerability for weeks, Microsoft said.