Linux

Oracle Linux 9 — fence-agents — security and stability fixes — required update — diagnosis and fix on Oracle Linux 9

Oracle Linux 9 — fence-agents — security and stability fixes — required update (ELSA-2023-2161)

🟡 Medium   ⏱ 10–30 min  Last verified: 26 October 2023 Affected versions: Oracle Linux 9 📖 ~4 min read  •  Source: ELSA advisory ELSA-2023-2161 Related CVEs: CVE-2022-36087 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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How to Install Perl on CentOS Stream 9 — step-by-step CentOS Stream 9 tutorial on Progressive Robot

How to Install Perl on CentOS Stream 9

Introduction How to Install Perl on CentOS Stream 9 on CentOS Stream 9 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 […]

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Alpine Linux edge — libtommath — vulnerability — patch and remediation guide — diagnosis and fix on Alpine Linux edge

Alpine Linux edge — libtommath — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Alpine Linux edge / fixed in 1.2.1-r0 📖 ~4 min read  •  Source: Alpine secdb entry — libtommath 1.2.1-r0 Related CVEs: CVE-2023-36328 Upstream summary: Alpine community repository for vedge ships libtommath 1.2.1-r0 which addresses CVE-2023-36328. Table of contents Symptom & Impact Environment […]

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Common Problems 120187

Debian 12 unattended-upgrades Stuck with Broken Package State

🟠 High   ⏱ 5–30 min  Last verified: 26 October 2023 Affected versions: Debian 12 📖 ~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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Common Problems 116892

Ubuntu 22.04 LTS – apt lock prevents updates during maintenance windows – Fix & Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 26 October 2023 Affected versions: Ubuntu 22.04 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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Debian 12 — libmtp — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Debian 12

Debian 12 — libmtp — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 26 October 2023 Affected versions: Debian 12 (bookworm) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2017-9831 CVE-2017-9832 Upstream summary: An integer overflow vulnerability in the ptp_unpack_EOS_CustomFuncEx function of the ptp-pack.c file of libmtp (version 1.1.12 and below) allows attackers to cause a denial […]

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Alpine Linux edge — mosquitto — multiple vulnerabilities (14 CVEs) — patch and remediation guide — diagnosis and fix on Alpine Linux edge

Alpine Linux edge — mosquitto — multiple vulnerabilities (14 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Alpine Linux edge / fixed in 2.0.8-r0 📖 ~4 min read  •  Source: Alpine secdb entry — mosquitto 2.0.8-r0 Related CVEs: CVE-2021-34432 CVE-2023-28366 CVE-2023-0809 CVE-2023-3592 CVE-2021-28166 CVE-2019-11779 CVE-2018-12546 CVE-2018-12550  +6 more Upstream summary: Alpine main repository for vedge ships mosquitto 2.0.8-r0 which […]

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Debian 12 — node-sshpk — vulnerability — patch and remediation guide — diagnosis and fix on Debian 12

Debian 12 — node-sshpk — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 26 October 2023 Affected versions: Debian 12 (bookworm) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2018-3737 Upstream summary: sshpk is vulnerable to ReDoS when parsing crafted invalid public keys. Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage […]

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Debian 12 — btrfsmaintenance — vulnerability — patch and remediation guide — diagnosis and fix on Debian 12

Debian 12 — btrfsmaintenance — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 26 October 2023 Affected versions: Debian 12 (bookworm) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2018-14722 Upstream summary: An issue was discovered in evaluate_auto_mountpoint in btrfsmaintenance-functions in btrfsmaintenance through 0.4.1. Code execution as root can occur via a specially crafted filesystem label if […]

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Debian 12 — tang — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Debian 12

Debian 12 — tang — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 26 October 2023 Affected versions: Debian 12 (bookworm) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2021-4076 CVE-2023-1672 Upstream summary: A flaw exists in tang, a network-based cryptographic binding server, which could result in leak of private keys. Table of contents Symptom & Impact […]

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