What is Jared's best option to remediate a Linux kernel vulnerability identified by CVE-2018-5703?

Patching the operating system is the best option for remediating a Linux kernel vulnerability such as CVE-2018-5703. Patching involves applying updates provided by the software vendor to fix vulnerabilities in the code. In this case, the specific vulnerability in the Linux kernel would be addressed by the relevant security patch that contains fixes and mitigations.

By applying the patch, Jared can directly address the identified security flaw, thus minimizing the risks associated with potential exploitation. Software patches often come with not only vulnerability fixes but also improvements in stability and performance. Therefore, keeping the system up-to-date with the latest patches is a critical best practice in maintaining system security.

While options such as upgrading to a new server or restricting network access can contribute to security, they do not specifically remediate the identified kernel vulnerability. Disabling IPv6 could also limit functionality without addressing the core issue of the CVE itself. Hence, patching the operating system remains the most effective and targeted response to such vulnerabilities.