Linux

AlmaLinux 10 — cloud-init — vulnerability — patch and remediation guide — diagnosis and fix on AlmaLinux 10

AlmaLinux 10 — cloud-init — vulnerability — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: AlmaLinux 10 📖 ~4 min read  •  Source: AlmaLinux ALSA ALSA-2025:10844 Related CVEs: CVE-2024-6174 Upstream summary: The cloud-init packages provide a set of init scripts for cloud instances. Cloud instances need special scripts to run during initialization to retrieve and install SSH […]

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Common Problems 124094

Oracle Linux 10 – nftables rule order drops established traffic – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 6 November 2025 Affected versions: Oracle Linux 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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Debian 13 — libjgraphx-java — vulnerability — patch and remediation guide — diagnosis and fix on Debian 13

Debian 13 — libjgraphx-java — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 6 November 2025 Affected versions: Debian 13 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2017-18197 Upstream summary: In mxGraphViewImageReader.java in mxGraph before 3.7.6, the SAXParserFactory instance in convert() is missing flags to prevent XML External Entity (XXE) attacks, as demonstrated by /ServerView. Table […]

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How to Secure Nginx with Let's Encrypt and Certbot on RHEL 9 — step-by-step RHEL 9 tutorial on Progressive Robot

How to Secure Nginx with Let’s Encrypt and Certbot on RHEL 9

HTTPS is no longer optional — browsers mark HTTP sites as “Not Secure”, search engines penalise them in rankings, and many modern browser APIs (service workers, geolocation, camera access) require a secure context. Let’s Encrypt provides free, automated, and trusted SSL/TLS certificates via the ACME protocol, and Certbot is the recommended ACME client that handles […]

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Common Problems 119586

Debian 13 Docker Network Bridge Conflict With Host Subnet

🟡 Medium   ⏱ 5–30 min  Last verified: 6 November 2025 📖 ~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 & Cross-Refs References & Further […]

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Debian 13 — scilab — multiple vulnerabilities (19 CVEs) — patch and remediation guide — diagnosis and fix on Debian 13

Debian 13 — scilab — multiple vulnerabilities (19 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 6 November 2025 Affected versions: Debian 13 (trixie) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2008-4983 CVE-2010-3378 CVE-2019-20005 CVE-2019-20006 CVE-2019-20007 CVE-2019-20198 CVE-2019-20199 CVE-2019-20200  +11 more Upstream summary: scilab-bin 4.1.2 allows local users to overwrite arbitrary files via a symlink attack on (a) /tmp/SciLink#####1, […]

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How to Switch Default Java with alternatives on RHEL 10 — step-by-step RHEL 10 tutorial on Progressive Robot

How to Switch Default Java with alternatives on RHEL 10

Introduction Setting up switch default java with alternatives on a RHEL 10 server is a common task for system administrators, DevOps engineers, and site reliability engineers. This guide explains how to Switch Default Java with alternatives on RHEL 10, with all the commands you need, the SELinux and firewalld considerations to keep in mind, and […]

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Alpine Linux 3.20 — libsoup — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Alpine Linux 3.20

Alpine Linux 3.20 — libsoup — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Alpine Linux 3.20 / fixed in 2.68.2-r0 📖 ~4 min read  •  Source: Alpine secdb entry — libsoup 2.68.2-r0 Related CVEs: CVE-2019-17266 CVE-2017-2885 Upstream summary: Alpine community repository for vv3.20 ships libsoup 2.68.2-r0 which addresses CVE-2019-17266. Table of contents Symptom & Impact […]

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Debian 13 — netkit-telnet-ssl — multiple vulnerabilities (5 CVEs) — patch and remediation guide — diagnosis and fix on Debian 13

Debian 13 — netkit-telnet-ssl — multiple vulnerabilities (5 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 6 November 2025 Affected versions: Debian 13 (trixie) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2004-0640 CVE-2004-0911 CVE-2004-0998 CVE-2005-0469 CVE-2020-10188 Upstream summary: Format string vulnerability in the SSL_set_verify function in telnetd.c for SSLtelnet daemon (SSLtelnetd) 0.13 allows remote attackers to execute arbitrary code. […]

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Alpine Linux 3.20 — glib-networking — vulnerability — patch and remediation guide — diagnosis and fix on Alpine Linux 3.20

Alpine Linux 3.20 — glib-networking — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Alpine Linux 3.20 / fixed in 2.64.3-r0 📖 ~4 min read  •  Source: Alpine secdb entry — glib-networking 2.64.3-r0 Related CVEs: CVE-2020-13645 Upstream summary: Alpine community repository for vv3.20 ships glib-networking 2.64.3-r0 which addresses CVE-2020-13645. Table of contents Symptom & Impact Environment […]

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