Use After Free on Docker

Use After Free (UAF) vulnerabilities in Docker environments typically arise from improper memory management in container runtimes, Docker daemon operations, or when handling container lifecycle events. These vulnerabilities allow attackers to access memory that has been freed, potentially leading to arbitrary code execution, privilege escalation, or information disclosure.

In Docker contexts, UAF vulnerabilities often appear in:

• Docker daemon memory management during container creation/destruction
• Volume mounting operations where memory is allocated and freed
• Network namespace handling in container networking
• Image layer management and caching mechanisms

A common Docker-specific UAF scenario involves container metadata handling. When a container is destroyed, the Docker daemon may free memory associated with that container's metadata. However, if references to this metadata persist in background processes or event handlers, an attacker could exploit the freed memory.