Yosemite Kernel panics involving com.apple.driver.AppleUSBCDC
Let me guess: the kernel panics appeared with the 10.10.3 update? Well, then I am 98% certain it is a bug in OS X Yosemite. Welcome aboard. The kernel panics are totally erratic, some users have also graphics glitches. The only common feature is having a Intel HD 4000 GPU.

On MacBook Pros with dual GPU you can avoid the problem by disabling Automatic Graphics Switching (System Preferences > Energy Saver). 

After countless phone calls with Apple, I will take my Mac to the Apple Store tomorrow. I am sure they won't find a thing. Then they will keep my Mac for five days, replace the logic board and the issue will persist. Please proof me wrong Apple...

Please contribute to the thread in the apple discussion forum and file a bug report (with link to the thread).