DEEP DIVE · 9 min read
eBPF for Detection: Beyond the Hype
eBPF gives kernel-grade visibility without a kernel module. That's transformative for runtime security — but only if you understand where the technology fits and where it doesn't.
What eBPF is great at
Syscall visibility, network flow, file access, process trees — all with low overhead and no module signing dance.
What it isn't
It's not magic. Kernel exploits, rootkits that hide from eBPF probes, and userspace-only attacks all sit outside its sweet spot.
- Doesn't replace EDR for userland telemetry
- Can be unloaded by root unless locked down
- Probe placement matters — pick stable hooks
Build a useful program
Start with a CO-RE Tracee/Falco ruleset. Add custom probes for the syscalls your threat model cares about. Pipe events to your SIEM, not the next dashboard.
Tools mentioned
bpftraceFalcoTetragonTraceelibbpfPixie
⟩ takeaway
eBPF is the best runtime telemetry we've ever had on Linux. Use it for visibility, pair it with hardening for control.
⟩ keep reading
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