VMware Patch & Update Classifications for VMware ESX Server 3.0.x-3.5.x
The patches that belong to this category fix one or more potential security vulnerabilities in ESX. Immediately implement security patches to protect your system from these vulnerabilities.
The patches that belong to this category fix flaws in the product that can potentially cause data loss or severe service disruptions. Immediately implement critical patches.
The patches that belong to this category can include fixes for minor flaws, new driver updates, and non-intrusive enhancements. Evaluate general patches to determine if any resolved issues or enhancements benefit your system. Apply these patches as needed.