Linux admins,

Before heading into the weekend, here are three Linux security topics worth catching up on. One looks at how attackers gain persistent kernel-level access, another highlights a growing malware campaign targeting security researchers through fake GitHub repositories, and the third explains how eBPF gives defenders better visibility into suspicious runtime behavior.

 Yours in Open Source,

Dv Signature Newsletter 2026 Esm W100

Dave Wreski, Founder

How Attackers Abuse Linux Kernel Modules

Loadable Kernel Modules (LKMs) remain one of the most powerful post-compromise techniques available to attackers. Once loaded, a malicious kernel module can hide processes, intercept system calls, disable security tools, and maintain persistence while operating below many traditional endpoint defenses. Organizations running Linux servers and cloud workloads should review module-loading policies, Secure Boot, module signing, and runtime monitoring to reduce this attack surface.

→ Read about How Attackers Abuse Linux Kernel Modules After Compromising Cloud Workloads

Fake GitHub PoC Repositories Are Infecting Security Researchers

A recent campaign has been disguising malware as proof-of-concept exploits for newly disclosed vulnerabilities. Security professionals often download public PoCs to validate vulnerabilities, making these repositories an attractive delivery method for remote access trojans. Before running any public exploit code on Linux systems, verify the repository's authenticity, inspect the code, and use isolated testing environments whenever possible.

→ Read about how GitHub Malware Campaign Uses Fake PoC Repositories to Target Security Researchers

eBPF Brings Runtime Visibility to Linux Threat Detection

Traditional logs often show what happened after the fact but miss the runtime context needed to understand attacker behavior. eBPF allows security teams to observe process execution, network activity, file access, and system calls directly from the Linux kernel with minimal overhead. When combined with behavioral detection, it helps uncover threats that signature-based tools frequently miss.

→ Read about Behavioral Detection with eBPF: A Practical Guide to Linux Threat Detection