A vulnerability's severity (high, medium or low) is based on its CVSS score:
|7 - 10||High|
|4 - 6.9||Medium|
|0 - 3.9||Low|
The score is comprised of measurements of each of the following metrics:
- Attack Vector (AV)
- Attack Complexity (AC)
- Privileges Required (PR)
- User Interaction (UI)
- Scope (S)
- Confidentiality (C)
- Integrity (I)
- Availability (A)
Check out this calculator for CVSS here.
Linux vulnerability severity definitions
Snyk uses several sources to determine the severity of each vulnerability for a specific Linux distribution. A vulnerability can be a high-severity issue in the most general context, but a lower severity issue in specific Linux distributions such as Debian or Ubuntu.
CVSS scoring can also have complex severity scoring. As most sources do not have a corresponding CVSS score, the CVSS score usually only reflects NVD information, which may not align with the CVSS severity.
To better understand Snyk severity scores, see the Relative Importance feature.