If you've got "a malicious process running on the system", you gotta assume that you're pwned. Just sayin'.
Yeah this is so lame. Ofc when you let a malware run it's gonna do something bad, they say "side-channel attack" as if who knows what happened
Linux kernel syscall tweaked to shut data-leak hole January 8, 2019 https://www.theregister.co.uk/2019/01/08/linux_patch_page_cache/