Linux admins,

The Linux community has some amazing kernel hackers. By the time you're able to contribute code that becomes part of the kernel, you must really know what you're doing. They're always trying to find new ways to improve performance. Unfortunately, one of these performance tweaks also introduced new opportunities for attackers to evade syscall-level monitoring to abuse a kernel feature in a way that minimizes its footprint.

 Read on to learn more about how advancements in system-level I/O frameworks can inadvertently create gaps in traditional detection methodologies. It’s a modern twist on threat execution that targets how the kernel interacts with user-space I/O, not where execution happens within privilege ring boundaries. 

Yours in Open Source,

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Dave Wreski

LinuxSecurity Founder

RingReaper Malware: A Stealthy Challenge for Linux Defenders

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There’s a new tool of mischief in the Linux cybersecurity world, and it’s not just a cause for concern—it’s quite the wake-up call. “RingReaper” isn’t your run-of-the-mill Linux malware. It’s not brute-forcing its way into systems, making loud noises in your process lists, or flooding your logs with anomalous entries. No, this particular piece of malware operates like a whisper in the back of the room—quiet but deliberate, using technology that’s both cutting-edge and largely unfamiliar to traditional security solutions.

This isn’t just speculative malware pulling theoretical tricks out of a research paper. RingReaper is practical, tested in the wild, and designed for one thing: staying invisible to the tools Linux admins trust to keep their systems safe. If you’re not paying attention, you might never even know it was there. Let's take a closer look at how this stealthy Linux malware operates, what sets it apart, and measures you can take to secure your Linux systems against RingReaper.

Learn About RingReaper Malware>>

National Security & AI at DEFCON 2025: Where Code Meets Crisis

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DEFCON isn’t your average tech conference. It’s not about launching flashy products or corporate handshakes—it’s about putting reality under a microscope and asking big, uncomfortable questions. This year, the 2025 DEFCON hacking conference had a sharp focus: securing the digital backbone of the nation. And let’s be honest, seeing how razor-thin those defenses sometimes are when stacked against evolving threats can make even the most seasoned sysadmin bite their nails.

From critical infrastructure to AI-powered supply chains, the discussions and competitions this year felt urgent, but not in that doom-and-gloom, doomsday-prepper vibe. It was more like: “Hey, things are bad, but here’s a list of practical moves to make them better before chaos settles in.” And, surprisingly, much of that resilience is coming from the collision between artificial intelligence and well-established security practices. 

Learn About National Security at DEFCON 2025>>