In 2003, an attacker breached a public-facing server and attempted to slip a subtle backdoor into the Linux kernel’s source code. The exploit was deviously simple, a small modification that would grant root access under specific conditions, making it nearly invisible to casual review. However, the Linux development process requires cryptographic signatures and meticulous code auditing. When a routine integrity check flagged an unexpected change, developers quickly investigated and discovered the malicious code before it could ever make it into an official release. This incident became a defining moment in Linux security, proving that while open source code is accessible, its real strength lies in the transparency and scrutiny of its community.
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