chris

openSUSE Tumbleweed — k9s — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on openSUSE Tumbleweed

openSUSE Tumbleweed — k9s — multiple vulnerabilities (3 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: openSUSE Tumbleweed 📖 ~4 min read  •  Source: SUSE advisory SUSE-SU-2025:20516-1 (see also SUSE bugzilla) Related CVEs: CVE-2025-53547 CVE-2024-26147 CVE-2023-25165 Upstream summary: Helm is a package manager for Charts for Kubernetes. Prior to 3.18.4, a specially crafted Chart.yaml file along with a […]

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How to Set Up Varnish Cache as a Reverse Proxy on RHEL 9 — step-by-step RHEL 9 tutorial on Progressive Robot

How to Set Up Varnish Cache as a Reverse Proxy on RHEL 9

Varnish Cache is a high-performance HTTP reverse proxy designed specifically for caching. Unlike Nginx FastCGI cache which caches PHP output files on disk, Varnish stores cached objects entirely in RAM and can serve tens of thousands of requests per second from memory. Varnish operates in front of your web server: it listens on port 80 […]

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Ubuntu 24.04 — jinja2 — multiple vulnerabilities (4 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 24.04

Ubuntu 24.04 — jinja2 — multiple vulnerabilities (4 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 9 November 2025 Affected versions: Ubuntu 24.04 (noble) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-7343-1 Related CVEs: CVE-2024-56201 CVE-2024-56326 CVE-2025-27516 CVE-2024-34064 Upstream summary: Rafal Krupinski discovered that Jinja2 did not properly restrict the execution of code in situations where templates are used maliciously. An […]

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How to Install Apache on SLES 16 — step-by-step SUSE Linux Enterprise 16 tutorial on Progressive Robot

How to Install Apache on SLES 16

Introduction This tutorial covers How to Install Apache 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. Step 1 — Install Apache zypper install -y apache2 Step 2 — Enable […]

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openSUSE Leap 15.6 — orc — vulnerability — patch and remediation guide — diagnosis and fix on openSUSE Leap 15.6

openSUSE Leap 15.6 — orc — vulnerability — 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 RHSA-2024:6184 (see also SUSE bugzilla) Related CVEs: CVE-2024-40897 Upstream summary: Stack-based buffer overflow vulnerability exists in orcparse.c of ORC versions prior to 0.4.39. If a developer is tricked to process a […]

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SLES 16 — libxkbcommon0 — multiple vulnerabilities (7 CVEs) — patch and remediation guide — diagnosis and fix on SLES 16

SLES 16 — libxkbcommon0 — multiple vulnerabilities (7 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 9 November 2025 Affected versions: SLES 16 📖 ~4 min read  •  Source: SUSE advisory SUSE-CU-2021:232-1 (see also SUSE bugzilla) Related CVEs: CVE-2018-15854 CVE-2018-15855 CVE-2018-15856 CVE-2018-15857 CVE-2018-15858 CVE-2018-15862 CVE-2018-15864 Upstream summary: Unchecked NULL pointer usage in xkbcommon before 0.8.1 could be used by local attackers to crash […]

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How to Configure Nginx FastCGI Caching on RHEL 9 — step-by-step RHEL 9 tutorial on Progressive Robot

How to Configure Nginx FastCGI Caching on RHEL 9

Nginx FastCGI caching stores the output of PHP-FPM (or any FastCGI backend) responses as files on disk and serves them directly without hitting PHP for subsequent requests. For a WordPress site or PHP application serving the same page to many users, this can reduce PHP execution from 200ms to under 1ms and cut server load […]

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How to Configure Kernel Parameters with sysctl on SLES 16 — step-by-step SUSE Linux Enterprise 16 tutorial on Progressive Robot

How to Configure Kernel Parameters with sysctl on SLES 16

Introduction This tutorial covers How to Configure Kernel Parameters with sysctl 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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SLES 16 — libQt6Nfc6 — vulnerability — patch and remediation guide — diagnosis and fix on SLES 16

SLES 16 — libQt6Nfc6 — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 9 November 2025 Affected versions: SLES 16 📖 ~4 min read  •  Source: SUSE advisory openSUSE-SU-2025:0033-1 (see also SUSE bugzilla) Related CVEs: CVE-2025-23050 Upstream summary: QLowEnergyController in Qt before 6.8.2 mishandles malformed Bluetooth ATT commands, leading to an out-of-bounds read (or division by zero). This is fixed […]

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Windows Server 2016 — KB5050525 — security update — patch and remediation guide — diagnosis and fix on Windows Server 2016

Windows Server 2016 — KB5050525 — security update — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Windows Server 2016 📖 ~4 min read  •  Source: Microsoft KB5050525 • MSRC update-guide entry Related CVEs: CVE-2025-21176 Affected components: Microsoft .NET Framework 3.5 AND 4.7.2 on Windows Server 2016 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis […]

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