Fix Prevention

Common Problems 123972

Oracle Linux 10 – dnf update fails with metadata checksum mismatch from mirror

🟠 High   ⏱ 5–30 min  Last verified: 11 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 12 — jakarta-mail — vulnerability — patch and remediation guide — diagnosis and fix on Debian 12

Debian 12 — jakarta-mail — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 11 November 2025 Affected versions: Debian 12 (bookworm) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2025-7962 Upstream summary: In Jakarta Mail 2.0.2 it is possible to preform a SMTP Injection by utilizing the \r and \n UTF-8 characters to separate different messages. Table of […]

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How to Install PostgreSQL 16 on RHEL 9 — step-by-step RHEL 9 tutorial on Progressive Robot

How to Install PostgreSQL 16 on RHEL 9

PostgreSQL (often called Postgres) is an advanced open-source relational database with a 35-year development history. Unlike MySQL/MariaDB, PostgreSQL prioritises SQL standards compliance, data integrity, and extensibility over speed-at-any-cost. PostgreSQL excels at complex queries, full-text search, JSONB document storage, geospatial data (PostGIS extension), and write-heavy workloads that require strong ACID compliance. It is the preferred database […]

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Rocky Linux 9 — redis — multiple vulnerabilities (4 CVEs) — patch and remediation guide — diagnosis and fix on Rocky Linux 9

Rocky Linux 9 — redis — multiple vulnerabilities (4 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Rocky Linux 9 📖 ~4 min read  •  Source: Rocky Linux RXSA RLSA-2025:20955 Related CVEs: CVE-2025-46817 CVE-2025-46818 CVE-2025-46819 CVE-2025-49844 Upstream summary: Redis is an advanced key-value store. It is often referred to as a data-structure server since keys can contain strings, hashes, […]

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Debian 13 — gitaly — vulnerability — patch and remediation guide — diagnosis and fix on Debian 13

Debian 13 — gitaly — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 11 November 2025 Affected versions: Debian 13 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2020-13353 Upstream summary: When importing repos via URL, one time use git credentials were persisted beyond the expected time window in Gitaly 1.79.0 or above. Table of contents Symptom […]

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

How to Set Up a LAMP Stack on SLES 16

Introduction This tutorial covers How to Set Up a LAMP Stack 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 MariaDB 10.11 on RHEL 9 — step-by-step RHEL 9 tutorial on Progressive Robot

How to Install MariaDB 10.11 on RHEL 9

MariaDB is a community-developed, fully open-source relational database and the default MySQL-compatible database in RHEL 9. It was created by the original MySQL developers after Oracle’s acquisition of MySQL and maintains complete protocol and API compatibility with MySQL applications. MariaDB 10.11 LTS is the current Long Term Support release, offering features that MySQL 8 does […]

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Ubuntu 16.04 — krb5 — multiple vulnerabilities (8 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 16.04

Ubuntu 16.04 — krb5 — multiple vulnerabilities (8 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 11 November 2025 Affected versions: Ubuntu 16.04 (xenial) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-7542-1 Related CVEs: CVE-2025-3576 CVE-2024-3596 CVE-2024-37370 CVE-2024-37371 CVE-2023-36054 CVE-2018-20217 CVE-2022-42898 CVE-2020-28196 Upstream summary: It was discovered that Kerberos allowed the usage of weak cryptographic standards. An attacker could possibly use […]

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Rocky Linux 8 — httpd — multiple vulnerabilities (4 CVEs) — patch and remediation guide — diagnosis and fix on Rocky Linux 8

Rocky Linux 8 — httpd — multiple vulnerabilities (4 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-2025:23732 Related CVEs: CVE-2025-55753 CVE-2025-58098 CVE-2025-65082 CVE-2025-66200 Upstream summary: The httpd packages provide the Apache HTTP Server, a powerful, efficient, and extensible web server. Security Fix(es): * httpd: Apache HTTP […]

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How to Set Up a Static IP Address on SLES 16 — step-by-step SUSE Linux Enterprise 16 tutorial on Progressive Robot

How to Set Up a Static IP Address on SLES 16

Introduction This tutorial covers How to Set Up a Static IP Address 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 […]

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