Security Hardening

Oracle Linux 8 — resource-agents — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — resource-agents — vulnerability — patch and remediation guide (ELSA-2026-1241)

🟠 High   ⏱ 15–60 min  Last verified: 17 July 2026 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2026-1241 Related CVEs: CVE-2025-66418 CVE-2025-66471 CVE-2026-21441 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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Oracle Linux 8 — Unbreakable Enterprise kernel — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — Unbreakable Enterprise kernel — vulnerability — patch and remediation guide (ELSA-2025-20471)

🟠 High   ⏱ 15–60 min  Last verified: 17 July 2026 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2025-20471 Related CVEs: CVE-2025-37738 CVE-2025-23140 CVE-2025-37757 CVE-2025-37792 CVE-2025-37824 CVE-2025-37839 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – […]

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Oracle Linux 9 — xorg-x11-server — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 9

Oracle Linux 9 — xorg-x11-server — vulnerability — patch and remediation guide (ELSA-2025-7163)

🟡 Medium   ⏱ 10–30 min  Last verified: 17 July 2026 Affected versions: Oracle Linux 9 📖 ~4 min read  •  Source: ELSA advisory ELSA-2025-7163 Related CVEs: CVE-2025-26601 CVE-2025-26594 CVE-2025-26596 CVE-2025-26599 CVE-2025-26597 CVE-2025-26595 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – […]

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Fedora 42 — nextcloud — multiple vulnerabilities (12 CVEs) — patch and remediation guide — diagnosis and fix on Fedora 42

Fedora 42 — nextcloud — multiple vulnerabilities (12 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Fedora 42 📖 ~4 min read  •  Source: Fedora update FEDORA-2026-2fed8dd674 Related CVEs: CVE-2026-33916 CVE-2026-33937 CVE-2026-33938 CVE-2026-33939 CVE-2026-33940 CVE-2026-33941 CVE-2026-4800 CVE-2026-39865  +4 more Upstream summary: 33.0.3 Release Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step […]

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Common Problems 115944

Ubuntu 26.04 LTS – UFW policy change blocks SSH access – Fix & Prevention

🔴 Critical   ⏱ 5–30 min  Last verified: 17 July 2026 Affected versions: Ubuntu 26.04 LTS 📖 ~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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Rocky Linux 8 — kernel — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Rocky Linux 8

Rocky Linux 8 — kernel — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Rocky Linux 8 📖 ~4 min read  •  Source: Rocky Linux RXSA RLSA-2026:19666 Related CVEs: CVE-2026-46300 CVE-2026-46333 CVE-2024-41073 CVE-2025-40252 CVE-2025-68724 CVE-2026-23401 CVE-2026-31402 CVE-2026-31431  +12 more Upstream summary: The kernel packages contain the Linux kernel, the core of any Linux operating system. Security […]

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FreeBSD 15 — openssl — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 15

FreeBSD 15 — openssl — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 17 July 2026 Affected versions: FreeBSD 15 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: OpenSSL — Multiple vulnerabilities Related CVEs: CVE-2004-0079 CVE-2005-2969 CVE-2006-2937 CVE-2006-2938 CVE-2006-2940 CVE-2006-3738 CVE-2006-4339 CVE-2006-4343  +12 more Upstream summary: The OpenSSL project reports: Seven vulnerabilities in OpenSSL library. Highest classification Moderate. […]

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Ubuntu 14.04 — python3.4 — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 14.04

Ubuntu 14.04 — python3.4 — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 17 July 2026 Affected versions: Ubuntu 14.04 (trusty) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-8018-2 Related CVEs: CVE-2025-15367 CVE-2025-15366 CVE-2026-0865 https://bugs.launchpad.net/bugs/2143706 CVE-2025-15282 CVE-2026-0672 CVE-2025-13837 CVE-2025-11468  +12 more Upstream summary: USN-8018-1 fixed vulnerabilities in python3. That update introduced regressions. The patches for CVE-2025-15366 and CVE-2025-15367 […]

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How to Set Up a SonarQube Server on SLES 16 — step-by-step SUSE Linux Enterprise 16 tutorial on Progressive Robot

How to Set Up a SonarQube Server on SLES 16

Introduction This tutorial covers How to Set Up a SonarQube Server 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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How to Install Keepalived for High Availability on FreeBSD 15 — step-by-step FreeBSD 15 tutorial on Progressive Robot

How to Install Keepalived for High Availability on FreeBSD 15

Introduction This guide explains how to Install Keepalived for High Availability on FreeBSD 15 on FreeBSD 15. FreeBSD uses the pkg(8) binary package manager, rc.conf(5) for service startup configuration, and pf(4) as its primary packet filter. There is no SELinux or AppArmor — instead, FreeBSD provides the MAC (Mandatory Access Control) framework and Capsicum for […]

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