Guys I have the same problem I just posted it about it in the latest CL SW thread, wish I saw this one but glad I'm not alone!
Basically what's happening is Corsair Link is detecting a temperature spike on the "CPU" parameter (not the core temps but total CPU temp). If you click on CPU temp on the main screen you can see max temp for me is 200+C! Obviously that's not a true reading but some sort of glitch that's triggering the alert. Other monitoring software such as HWinfo, EVGA OCX, and MSI Afterburner don't pick this up so it looks to be a problem with Link.
For now, just disable the notifications for "CPU" temp on the main screen. Uncheck the box for "Max Value" and "set all fans to 100%" to just disable it. This way when it picks up the spike it won't trigger anything. You can still leave the alerts set on the individual core temps just make sure that's not where you're seeing the spike. For me it's only on the CPU temp. Hope this helps and hope Corsair is aware and has a fix incoming soon.