Discussions, questions and news about Linux from cybersecurity professionals on Cyberr.
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HOROIHEOMA LAZARUS CHIMEZIE — Cybersecurity Analyst
Building My Cybersecurity Home Lab with Kali Linux & VirtualBox Completed my Week 1 cybersecurity lab project at Networkwalks (batch B084)! The main challenge was configuring a dedicated NAT Network and static IPV4 address alongside my existing VirtualBox and Kali setup. Here’s…
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Frank Karani — Cybersecurity Specialist | #1 Rank Globally at CTFZone 2026 🏆 | #2 Rank East Africa at intervarsity 2026🏆 |Top 50 TCRA CyberChampions 2025/26 🇹🇿 | Top 1%globally 0xE [GUARDIAN] TryHackMe | Infrastructure Security & Penetration Testing | Student at IAA
🏆 Officially Secured Rank #358 Globally in TryHackMe "It's Downtime!" CTF Event! 🌍 First and foremost, I would like to express my deepest gratitude to the Almighty God. This stands as my greatest and most meaningful achievement of the year, marking an incredible milestone at t…
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Quinton Plaatjies — SOC Engineer
The headline suggests that OpenBSD 8.0 introduces three major areas of improvement: Stronger security controls : OpenBSD is already known for its security-first design, so this likely includes additional kernel hardening, stricter privilege separation, improved memory-protection…
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Schomer — Principal Security Solutions Architect & Founder
framework engine. I just locked in the architecture showcase for the Build With AI Hackathon. Built completely from scratch as a solo backend developer on a non-rooted Android device running Termux, the ETBV gateway engine achieves absolute logic assurance. The Metrics: • Valid…
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Quinton Plaatjies — SOC Engineer
“PHP Releases Emergency Windows Security Update To Fix Critical Brotli Decoder Vulnerability” highlights a serious security issue affecting PHP deployments on Windows that use the Brotli compression library. What is Brotli? Brotli is a compression algorithm developed by Google a…
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Laurent Halimi — CEO & Founder CYBERR & HEELR
Critical security issue affecting PHP he NCSC is encouraging UK organisations to take immediate action to mitigate a security issue affecting PHP (CVE-2026-109618 and CVE-2026-109619). What has happened? PHP has published a security update to address a critical security issue th…
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Maxwell Bwire — Technical Support Technician
Completed: Guided Pentest: Infrastructure | TryHackMe I've completed the Guided Pentest: Infrastructure room on TryHackMe, where I practised the main stages of an infrastructure penetration test, from enumeration to privilege escalation. What I worked on -Nmap: Scanned the targe…
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SHERIF SALAH EL-DIN — Cyber Security Analyst
https://youtu.be/jxJujICo9xc في الفيديو ده من مجتمع Information Security Tutorials هنتكلم عن ثغرات PHP2Shell اللي ظهرت في أكتوبر 2026، وليه الثغرات اللي بتصيب الـ PHP Runtime ممكن تمثل خطورة كبيرة على خوادم الويب والتطبيقات اللي بتعتمد عليه. هنناقش الثغرتين CVE-2026-109618 وCVE-…
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Nikki Webb — Cybersecurity is not just technical, it is human | Protecting people, businesses & resilience
#PHP2Shell has everyone rattled this week. Here is the calm version. Two critical flaws in PHP itself. Fixes are out. The National Cyber Security Centre says patch now. Most teams will update the servers they know about. The breach risk sits in the ones they don’t. The forgotten…
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Schomer — Principal Security Solutions Architect & Founder
[PERFORMANCE BENCHMARK] ETB PayShield Achieves 4,980.54 TPS Under High-Concurrency Load Matrix A core critique of deterministic pre-execution validation gates is that out-of-band input inspection introduces unacceptable processing overhead to high-throughput financial environmen…
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Liam Romanis — Freelance Penetration Tester
container_escape_audit.sh v4.8.4 — built for the kernels Kubernetes actually runs on An update to the read-only container-escape and LPE auditor, focused on the Linux distributions you actually find under Kubernetes nodes, plus two fresh CVEs. Node-OS coverage. The CVE engine no…
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SHERIF SALAH EL-DIN — Cyber Security Analyst
https://youtu.be/nBDgaOc-8MY Want to start your cybersecurity journey but aren't sure where to begin? Information Security Tutorials offers educational content designed to help you build a strong foundation in cybersecurity and develop practical skills step by step. 📚 Explore o…
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🚨 Something is taking shape behind the scenes… I’ve been quietly working on a my own independent cybersecurity project that’s evolving well beyond what I originally imagined. It started with a simple question: What if I could build my own environment to observe, investigate and…
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Schomer — Principal Security Solutions Architect & Founder
The boundaries are collapsing everywhere you look. Check out the breaking intel on the feed right now. We aren't just dealing with basic application bugs anymore—we are looking at structural engineering failures across the board: 🔘 Zero-Click Ad Spyware: Adversaries are deployi…
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SHERIF SALAH EL-DIN — Cyber Security Analyst
https://youtu.be/GD8nWaUXWoo 🚀 نفسك تبدأ في مجال الأمن السيبراني ومش عارف تبدأ منين؟ على قناة Information Security Tutorials هتلاقي مجموعة من الدورات التعليمية اللي هتساعدك تبني أساس قوي في الأمن السيبراني وتتطور خطوة بخطوة من المفاهيم الأساسية لحد المهارات العملية. 📚 اكتشف ال…
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Schomer — Principal Security Solutions Architect & Founder
EXECUTIVE MAPPING REPORT: EXTENDED TRUST BOUNDARY VALIDATION Document Reference: ETBV-CR-2026-OCT Classification: Internal Architectural Review / Executive Briefing Author: Justin Schomer, Founder --- 1. Executive Summary This report contextualizes the systemic, industry-wide pe…
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Building PhilSIEM v2: My Own Home Security Monitoring Environment I’ve been building something I’m calling PhilSIEM v2, a home-based cybersecurity monitoring environment designed to simulate the sort of detection and response workflow you’d find in a SOC. The idea is simple: Don…
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Schomer — Principal Security Solutions Architect & Founder
Hardening Layer Zero: Deterministic Gate Validation & Sub-Millisecond CWE-1000 Invariant Mapping on Restricted ARM64/Termux Sandbox While a significant portion of the security landscape relies on fragile, reactive signatures or heavy, high-overhead runtime agents that lose suppo…
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Schomer — Principal Security Solutions Architect & Founder
Deterministic Layer-Zero Frame Gating: Eliminating Modbus/TCP Vulnerability Classes Inline Tired of seeing the same legacy firmware flaws (buffer overflows, loop-bombs, alignment panics) patched one CVE at a time. The real fix belongs inline, dropping malicious frames before the…
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SHERIF SALAH EL-DIN — Cyber Security Analyst
🚀 Let’s Learn Cybersecurity Together! I’m inviting all my LinkedIn followers, connections, and anyone interested in Cybersecurity to join my YouTube channel Information Security Tutorials. On the channel, I share practical and easy-to-follow content covering: 🔹 Cybersecurity F…
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Quinton Plaatjies — SOC Engineer
If a reported AnyDesk Linux exploit exposes root access, the shareholder-value implications can be significant because it potentially gives attackers complete control over affected systems. 1. Operational Disruption Attackers with root privileges can disable systems, deploy rans…
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Schomer — Principal Security Solutions Architect & Founder
CISA just sounded an absolute alarm on two critical zero-days hitting Citrix NetScaler ADC and Gateway systems (CVE-2026-88771 and CVE-2026-88772). Threat actors are actively deploying memory-based shellcode directly onto perimeter systems to execute unauthenticated remote comma…
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Schomer — Principal Security Solutions Architect & Founder
Moving Beyond Access Control: Live Terminal Proof of Layer Zero Execution Integrity We talk heavily about shifting the defensive cybersecurity paradigm from "who got access" to "what is the autonomous machine action actively trying to do." Today, I spun up the local environment…
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Schomer — Principal Security Solutions Architect & Founder
Stripping away the marketing noise: Why are we still trying to solve boundary violations at the application layer with heuristic monitoring? If an architecture relies on dynamic memory allocation and reactive state checks at ingress, it's already vulnerable to tail-latency explo…
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Schomer — Principal Security Solutions Architect & Founder
Hardening Layer Zero: 8/8 Async Rust TCP Engine Validation Complete (ARM/Termux Wire Metrics) Following up on the inline Modbus proxy validation from earlier. I just finalized a wire validation run on the absolute lower-level foundation of the framework: the asynchronous Layer-Z…
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