Spectre is the latest vulnerability discovered in processors which allow amalicious application to trick another application into exposing its memory to read by the malicious application.
This vulnerability affects almost all the processor variants from Intel/AMD/ARM. Which means that all computers both Desktop/Laptop and SBC and all the smartphones are affected by this Vulnerability.
More information about this vulnerability can be found at https://spectreattack.com/
All OS manufacturers are releasing patches to fix these vulnerability, You can follow below steps to update the OS and patch the vulnerability.
Fix the Spectre on a CentOS/RHEL/Fedora/Oracle/Scientific Linux
Type the following yum command:
sudo yum update
You must reboot your Linux server using shutdown/reboot command:
Run the following dnf command if you are using a Fedora Linux:
sudo dnf --refresh update kernel
sudo dnf update
Reboot the Linux box:
Fix the Spectre on a Debian/Ubuntu Linux.
Use the following apt-get command/apt command:
sudo apt-get update
sudo apt-get upgrade
sudo shutdown -r 0
Fix the Spectre on an Amazon Linux running on AWS
Just run yum command:
yum update kernel