My favorite: a Linux kernel pcmcia bug. On EC2 VMs.
I'll top that: wireless-regdb out of date. Against an EC2-specific kernel.
In a similar vein:
Raising alarms on a CVE in Apache2 that only affects Windows when the server is Linux.
Or CVEs related to Bluetooth in cloud instances.
I'll top that: wireless-regdb out of date. Against an EC2-specific kernel.