Shared Kernel Isolation False Security in Containers

Docker containers rely on Linux kernel namespaces and cgroups for isolation rather than hardware virtualization. This creates a false sense of isolation—if a kernel vulnerability exists, all running containers inherit it. Container security is critically dependent on timely kernel updates to mitigate container escape vulnerabilities.

Sources

• https://duplocloud.com/blog/docker-advantages-and-disadvantages/
• https://news.ycombinator.com/item?id=45177566
• https://www.siriusopensource.com/en-us/blog/what-are-problems-docker

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