Kernel Drivers

Oracle Linux 8 — kernel — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — kernel — vulnerability — patch and remediation guide (ELSA-2026-0444)

🟠 High   ⏱ 15–60 min  Last verified: 21 November 2025 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2026-0444 Related CVEs: CVE-2025-39993 CVE-2025-40240 CVE-2025-68285 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification […]

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openSUSE Leap 15.6 — kernel — multiple vulnerabilities (6 CVEs) — patch and remediation guide — diagnosis and fix on openSUSE Leap 15.6

openSUSE Leap 15.6 — kernel — multiple vulnerabilities (6 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: openSUSE Leap 15.6 📖 ~4 min read  •  Source: SUSE advisory SUSE-SU-2025:01620-1 (see also SUSE bugzilla) Related CVEs: CVE-2025-39735 CVE-2025-21812 CVE-2025-22004 CVE-2025-22020 CVE-2025-22097 CVE-2025-21718 Upstream summary: In the Linux kernel, the following vulnerability has been resolved: jfs: fix slab-out-of-bounds read in ea_get() […]

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Oracle Linux 9 — kernel — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 9

Oracle Linux 9 — kernel — vulnerability — patch and remediation guide (ELSA-2025-15011)

🟠 High   ⏱ 15–60 min  Last verified: 18 November 2025 Affected versions: Oracle Linux 9 📖 ~4 min read  •  Source: ELSA advisory ELSA-2025-15011 Related CVEs: CVE-2025-38200 CVE-2025-38461 CVE-2025-37823 CVE-2025-38211 CVE-2025-38464 CVE-2025-38500 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – […]

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How to Configure Nginx with PageSpeed Module on SLES 16 — step-by-step SUSE Linux Enterprise 16 tutorial on Progressive Robot

How to Configure Nginx with PageSpeed Module on SLES 16

Introduction This tutorial covers How to Configure Nginx with PageSpeed Module on SLES 16 on SLES 16. SLES 16 (SUSE Linux Enterprise Server 16) is SUSE’s enterprise-grade Linux distribution. It uses the zypper package manager, AppArmor for mandatory access control, and systemctl for service management. Prerequisites Ensure your SLES 16 system is up to date: […]

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Common Problems 114117

RHEL 10 – Postfix starts but mail remains deferred due to SELinux policy denial – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 16 November 2025 Affected versions: RHEL 10 📖 ~1 min read Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance Criteria Rollback Plan Prevention & Hardening Related Errors & […]

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How to Configure Firewalld Zones and Rules on RHEL 10 — step-by-step RHEL 10 tutorial on Progressive Robot

How to Configure Firewalld Zones and Rules on RHEL 10

Introduction RHEL 10 ships with a stable, security-hardened base that makes deploying configure firewalld zones and rules both straightforward and auditable. This tutorial covers the complete procedure for how to Configure Firewalld Zones and Rules on RHEL 10, including dnf module streams where applicable, systemd unit management, and the firewalld rules required for network-facing services. […]

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How to Install Apache Kafka on Oracle Linux 10 — step-by-step Oracle Linux 10 tutorial on Progressive Robot

How to Install Apache Kafka on Oracle Linux 10

Introduction How to Install Apache Kafka on Oracle Linux 10 on Oracle Linux 10 provides administrators with a robust, enterprise-ready workflow that integrates cleanly with systemd, SELinux, firewalld, and the modern AppStream module system. In this tutorial we will walk through every step required, from package installation to verification, so that the resulting configuration is […]

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How to Install Jaeger Tracing on Debian 13 — step-by-step Debian 13 tutorial on Progressive Robot

How to Install Jaeger Tracing on Debian 13

Introduction Deploying install jaeger tracing on a Debian 13 Trixie machine is straightforward thanks to Debian’s policy-compliant packaging. Unlike rpm-based distributions, Debian stores configuration helpers in /etc/default/, uses update-rc.d for older init scripts, and provides dpkg-reconfigure for interactive package configuration. This tutorial stays on the systemd path throughout. Prerequisites Ensure Debian 13 Trixie is fully […]

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How to Install Nagios Core on Debian 13 — step-by-step Debian 13 tutorial on Progressive Robot

How to Install Nagios Core on Debian 13

Introduction This guide explains how to Install Nagios Core on Debian 13 on Debian 13 Trixie. Debian Trixie uses systemd for service management, nftables as the underlying packet filter (with ufw or iptables front-ends still available), and AppArmor for mandatory access control. Every command is designed for a minimal Debian 13 install with the standard […]

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Common Problems 114098

RHEL 10 Auditd Backlog Overflows and Drops Security Events

🔴 Critical   ⏱ 5–30 min  Last verified: 14 November 2025 Affected versions: RHEL 10 📖 ~1 min read Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution — Primary Fix Solution — Alternative Approaches Verification & Acceptance Criteria Rollback Plan Prevention & Hardening Related Errors & […]

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