panic (cpu 6 caller

Anonymous UUID: A3887499-00A5-A75C-658B-FAE9E7DB9E63 Mon Jul 23 21:55:30 2018 *** Panic Report *** panic(cpu 6 caller 0xffffff7f99e66012)...

I've been running Mavericks on a GA-Z87X-UD3H board with Core i7 4770k processor for the past couple of years. Yesterday I started getting "panic (cpu 3 caller)xffffff80002526cf): "a freed zone element has been modified: .....Sometimes it was (cpu 6 caller) See attached images to view the whole...