LinkedIn was hacked in 2012, and the passwords of 117 million accounts were compromised. Hackers will reuse the same email and password credentials elsewhere as they hunt out further details about you that could be used to steal your identity and turn a profit. LinkedIn also could have, and arguably should have, taken better steps to deal with the breach in 2012. Check if your account was compromised at https://://haveibeenpwned.com/ where youll find a searchable database covering breaches at various websites.”]
Source: https://www.csoonline.com/article/3079751/linkedin-data-breach-still-causing-problems.html