eBPF in 2026: The Kernel Revolution Powering Cloud-Native Security and Observability

eBPF in 2026: The Kernel Revolution Powering Cloud-Native Security and Observability References: Cloud Native Now, Medium DevOps Year Review, Tetragon Key Findings eBPF Goes Mainstream: In 2025, AWS EKS adopted Cilium (eBPF-based CNI) as default, marking eBPF's complete mainstreaming Massive Performance Gains: Cilium's eBPF data path delivers 30-40% higher throughput than traditional iptables networking Zero-Instrumentation Observability Reality: Track all syscalls, network packets, and file access without modifying application code or injecting sidecars Kernel-Level Security Transformation: Tetragon/Falco detect threats at the kernel layer, responding faster than userspace solutions Detailed Content What is eBPF (In One Sentence) eBPF (Extended Berkeley Packet Filter) is a sandboxing mechanism in the Linux kernel that allows users to safely run custom programs in kernel space without modifying kernel source code or rebooting the system. Its core magic: intercepting, observing, and mod