Overview
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Explore the critical security challenges facing container runtimes and Unix programs through this conference talk that examines filesystem-based attacks and path safety vulnerabilities. Delve into the decade-long history of confused-deputy style attacks targeting container runtimes, with particular focus on recent CVEs (CVE-2025-31133, CVE-2025-52565, and CVE-2025-52881) that have affected runc and other container systems. Learn about the fundamental issues that make filesystem APIs like /proc attractive targets for attackers and understand why traditional mitigation approaches have fallen short. Discover ongoing kernel development efforts aimed at simplifying path safety implementations and gain insights from real-world experience migrating container runtime codebases to path-safety-focused designs. Get an update on libpathrs, a library designed to help Linux programs more easily defend against these types of attacks, and understand the broader implications for Unix system security beyond just containerization.
Syllabus
Path Safety in the Trenches - Aleksa Sarai (SUSE LLC)
Taught by
Linux Plumbers Conference