Linux vulnerability scanning tools
Bash Scanner (vulnerable package detection for Linux)
Bash Scanner is a security tool that does a quick scan to see if there are vulnerable packages. It uses an external service to validate.
OpenVAS (vulnerability scanner)
OpenVAS is a framework of several services and tools offering a vulnerability scanning and vulnerability management solution.
vulnix (vulnerability scanner for NixOS)
Vulnix is a security scanner for NixOS. It specifically looks for vulnerabilities in available packages and comes with a command line interface (CLI).