I work directly on live Linux server incidents — from compromised systems and malware infections to high CPU usage, service crashes, and production outages. My focus is fast diagnosis, controlled recovery, and long-term hardening.
Virtual machines offer a layer of isolation, but they are not a security boundary you can fully trust. Understanding where that isolation breaks down — and how to tighten it — is essential for anyone running sensitive workloads inside a hypervisor. Weaknesses Host-to-Guest and Guest-to-Host Compromise The trust relationship between host and
Critical — Local Privilege Escalation + Container Escape Kernel cryptographic subsystem (AF_ALG / algif_aead). Any local user → root. Any container → host node escape. Overview Field Detail CVE CVE-2026-31431 Nickname Copy Fail Disclosed 2026-04-29 Component Linux kernel — AF_ALG interface (algif_aead module) Impact LPE (user → root), container escape (pod → host) Exploit
wp_options Health Check -- Row count (healthy: 500–2000, bad: 50k+) SELECT COUNT(*) FROM wp_options; -- Autoload payload size (>1MB = problem, >3MB = serious, >10MB = broken) SELECT SUM(LENGTH(option_value)) / 1024 / 1024 AS autoload_mb FROM wp_options WHERE autoload = 'yes'; -- Biggest
Table of Contents * Overview * Critical Issue: CVE-2026-23918 (CVSS 8.8) * Privilege Escalation: CVE-2026-24072 * Additional Fixes in 2.4.67 * Immediate Mitigation Steps * FAQs Overview The Apache Software Foundation has disclosed multiple security vulnerabilities affecting the Apache HTTP Server, including a high-impact remote code execution issue. Any system running 2.4.
OS: CloudLinux 9 Panel: cPanel/WHM Method: TOTP via pam_google_authenticator Supports: Key + TOTP and Password + TOTP simultaneously Table of Contents * Prerequisites * Installation * PAM Configuration * SSH Daemon Configuration * User Enrollment * Sharing a Secret (Shared Root Setup) * Authentication Flow Reference * Offboarding a Team Member * Troubleshooting * Reverting Everything Prerequisites * Root access
Table of Contents 💡This post assumes you've Proxmox VE 7.4.x, non-enterprise without ceph * Pre-flight Checks * Phase 1 - Backup the VM to /backup * Phase 2 - Session Safety * Phase 3 - Upgrade 7.4 to 8.x * Phase 4 - Reboot and Verify on 8.x