There have certainly been worse data leak stories, but Aaron Souppouris at The Verge is reporting that a user in a Russian forum claims to be in possession of details for roughly 6.5 million LinkedIn accounts, including passwords, that were intercepted. As proof of their claim, the hashed passwords were published online. LinkedIn is investigating, and reports are trickling in that lend veracity to the statement.
The good news is that the passwords were hashed with SHA-1, but you should still be concerned. If you have a strong password (it’s not “Linkedin”, is it?), the hash should buy you enough time to change your password, just in case.