Survey finds 76% are deploying automated patching procedures and that live patching to fix vulnerabilities is commonly used (47%) to avoid downtime that is normally associated with patching. Yet, the survey found that manually researching vulnerabilities online is the most commonly used method (75%) in vulnerability management. 45% said they cope with vulnerabilities simply by waiting for the next periodic maintenance window before applying patches. 73% of respondents rely on a single operating system in their server fleets suggesting that organizations value the ease of maintenance of using a single Linux distribution.
Source: https://www.helpnetsecurity.com/2021/07/14/security-vulnerabilities-data-center-servers/