Security Hardening

Debian 13 — ublock-origin — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on Debian 13

Debian 13 — ublock-origin — multiple vulnerabilities (3 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 7 January 2026 Affected versions: Debian 13 (trixie) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2021-36773 CVE-2022-32308 CVE-2025-4215 Upstream summary: uBlock Origin before 1.36.2 and nMatrix before 4.4.9 support an arbitrary depth of parameter nesting for strict blocking, which allows crafted web sites […]

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How to Install Nagios Core on RHEL 10 — step-by-step RHEL 10 tutorial on Progressive Robot

How to Install Nagios Core on RHEL 10

Introduction How to Install Nagios Core on RHEL 10 on RHEL 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 reproducible and […]

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Ubuntu 18.04 — radare2 — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 18.04

Ubuntu 18.04 — radare2 — multiple vulnerabilities (3 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 7 January 2026 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-7915-1 Related CVEs: CVE-2025-60361 CVE-2025-60360 CVE-2025-60359 Upstream summary: It was discovered that Radare2 contained several memory leaks. An attacker could possibly use these issues to cause a denial of service. […]

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Amazon Linux 2 — emacs — multiple vulnerabilities (11 CVEs) — patch and remediation guide — diagnosis and fix on Amazon Linux 2

Amazon Linux 2 — emacs — multiple vulnerabilities (11 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Amazon Linux 2 📖 ~4 min read  •  Source: Amazon Linux advisory ALAS2-2025-2770 Related CVEs: CVE-2025-1244 CVE-2024-53920 CVE-2024-30203 CVE-2024-30204 CVE-2024-30205 CVE-2024-39331 CVE-2023-28617 CVE-2022-48337  +3 more Upstream summary: A flaw was found in the Emacs text editor. Improper handling of custom "man" URI […]

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SLES 16 — dcraw — multiple vulnerabilities (11 CVEs) — patch and remediation guide — diagnosis and fix on SLES 16

SLES 16 — dcraw — multiple vulnerabilities (11 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 7 January 2026 Affected versions: SLES 16 📖 ~4 min read  •  Source: SUSE advisory SUSE-SU-2017:3392-1 (see also SUSE bugzilla) Related CVEs: CVE-2017-13735 CVE-2017-14608 CVE-2018-19566 CVE-2018-19568 CVE-2018-19655 CVE-2018-5805 CVE-2018-5806 CVE-2021-3624  +3 more Upstream summary: There is a floating point exception in the kodak_radc_load_raw function in dcraw_common.cpp in […]

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Ubuntu 20.04 — cups — multiple vulnerabilities (17 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 20.04

Ubuntu 20.04 — cups — multiple vulnerabilities (17 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 7 January 2026 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-7912-2 Related CVEs: CVE-2025-58436 https://launchpad.net/bugs/2133207 CVE-2025-61915 CVE-2025-58060 CVE-2025-58364 CVE-2024-47175 https://launchpad.net/bugs/2070315 CVE-2024-35235  +9 more Upstream summary: USN-7912-1 fixed vulnerabilities in CUPS. This update provides the corresponding update for Ubuntu 16.04 LTS, […]

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Oracle Linux 9 — webkit2gtk3 — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 9

Oracle Linux 9 — webkit2gtk3 — vulnerability — patch and remediation guide (ELSA-2025-23700)

🟠 High   ⏱ 15–60 min  Last verified: 7 January 2026 Affected versions: Oracle Linux 9 📖 ~4 min read  •  Source: ELSA advisory ELSA-2025-23700 Related CVEs: CVE-2025-43501 CVE-2025-43529 CVE-2025-43531 CVE-2025-43535 CVE-2025-43536 CVE-2025-43541 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 — osbuild-composer — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 9

Oracle Linux 9 — osbuild-composer — vulnerability — patch and remediation guide (ELSA-2025-19594)

🟡 Medium   ⏱ 10–30 min  Last verified: 7 January 2026 Affected versions: Oracle Linux 9 📖 ~4 min read  •  Source: ELSA advisory ELSA-2025-19594 Related CVEs: CVE-2025-27144 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance […]

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Oracle Linux 10 — binutils — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 10

Oracle Linux 10 — binutils — vulnerability — patch and remediation guide (ELSA-2025-23306)

🟡 Medium   ⏱ 10–30 min  Last verified: 7 January 2026 Affected versions: Oracle Linux 10 📖 ~4 min read  •  Source: ELSA advisory ELSA-2025-23306 Related CVEs: CVE-2025-11082 CVE-2025-11083 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 — nodejs:22 — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — nodejs:22 — vulnerability — patch and remediation guide (ELSA-2025-1611)

🟠 High   ⏱ 15–60 min  Last verified: 7 January 2026 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2025-1611 Related CVEs: CVE-2025-23085 CVE-2025-22150 CVE-2025-23083 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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