Networking Articles

Cloudflare

11 min read

Backend•2026-05-12

When "idle" isn't idle: how a Linux kernel optimization became a QUIC bug

This post analyzes a critical bug in CUBIC, Linux's default TCP and QUIC congestion control algorithm, where the congestion window becomes permanently pinned at its minimum after a congestion collapse event.

Congestion Control

Debugging

QUIC

QUICHE

Networking

HTTP3

Rust

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