Thanks to some questions from Jim Hysell, I found a bug in ldms_core yesterday, which has been fixed in 3.6.4. The bug was in the listing of detected vulns and autofix vulns by severity, which are then added together to make the detected and autofix lines in the Vulnerabiltiy Statistics graph. Prior to 3.6.4, the number is only accurate if you haven't created overlapping scopes. Of course, since everything's covered by the default "All machines" scope, that effectively means that all scopes overlap at least little. This caused the vulns on the machines that are in overlap to be counted once per scope that the machine was in, which is probably not what anyone wants.

Net result: For some LDSS admins, upgrading to ldms_core 3.6.4 or greater will cause a precipitous drop in the number of detected and autofix vulnerabilities. The new number is more accurate than the older one.

So, in figuring that out I also realized that I could delineate between vulns detected, and machines with vulns, which wasn't very clear in the text report. There's a big difference between "you've got six critical vulns in the environment" and "you've got six machines with critical vulns on them"... These values are now clarified:

Detected vulnerability counts by severity:
Critical - 68 vulnerabilities found on 8 machines.
High - 45 vulnerabilities found on 7 machines.
Low - 12 vulnerabilities found on 9 machines.
Medium - 48 vulnerabilities found on 10 machines.
N/A - 129 vulnerabilities found on 11 machines.
Service Pack - 10 vulnerabilities found on 3 machines.
Unknown - 11 vulnerabilities found on 9 machines.

Detected vulnerabilities set to autofix by severity:
Critical - 64 vulnerabilities found on 7 machines.
High - 40 vulnerabilities found on 5 machines.
Low - 4 vulnerabilities found on 4 machines.
Medium - 12 vulnerabilities found on 7 machines.
N/A - 47 vulnerabilities found on 7 machines.
Service Pack - 1 vulnerability found on 1 machine.
Unknown - 5 vulnerabilities found on 7 machines.

By the way, I've also posted ldms_core to google code, so anyone so inclined can use the source code more easily. I'll do the same for my other projects as time permits.