Logging Monitoring

FreeBSD 12 — nfsen — security advisory — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — nfsen — security advisory — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: nfsen — remote command execution Upstream summary: Peter Haag reports: A remote attacker with access to the web interface to execute arbitrary commands on the host operating system. Table of […]

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Ubuntu 18.04 — bzip2 — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 18.04

Ubuntu 18.04 — bzip2 — multiple vulnerabilities (3 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-4038-3 Related CVEs: https://launchpad.net/bugs/1834494 CVE-2016-3189 CVE-2019-12900 Upstream summary: USN-4038-1 fixed a vulnerability in bzip2. The update introduced a regression causing bzip2 to incorrect raises CRC errors for some files. We […]

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Ubuntu 16.04 — php-imagick — vulnerability — patch and remediation guide — diagnosis and fix on Ubuntu 16.04

Ubuntu 16.04 — php-imagick — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: Ubuntu 16.04 (xenial) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-4586-2 Related CVEs: CVE-2019-11037 Upstream summary: USN-4586-1 fixed vulnerabilities in PHP ImageMagick. This update provides the corresponding update for Ubuntu 16.04 ESM. Original advisory details: It was discovered that PHP […]

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SLES 15 — libpotrace0 — multiple vulnerabilities (4 CVEs) — patch and remediation guide — diagnosis and fix on SLES 15

SLES 15 — libpotrace0 — multiple vulnerabilities (4 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: SLES 15 📖 ~4 min read  •  Source: SUSE security advisory (see also SUSE bugzilla) Related CVEs: CVE-2016-8685 CVE-2016-8686 CVE-2013-7437 CVE-2017-12067 Upstream summary: The findnext function in decompose.c in potrace 1.13 allows remote attackers to cause a denial of service (invalid memory […]

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Oracle Linux 8 — wavpack — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — wavpack — vulnerability — patch and remediation guide (ELSA-2020-1581)

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2020-1581 Related CVEs: CVE-2018-19840 CVE-2019-1010315 CVE-2019-1010319 CVE-2018-19841 CVE-2019-11498 CVE-2019-1010317 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – […]

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How to Install Prometheus and Grafana on RHEL 9 — step-by-step RHEL 9 tutorial on Progressive Robot

How to Install Prometheus and Grafana on RHEL 9

Prometheus and Grafana are a powerful open-source monitoring stack widely used in production Linux environments. Prometheus collects and stores time-series metrics, while Grafana provides rich dashboards and alerting on top of that data. Together they give you deep visibility into system performance, resource utilization, and application health. This tutorial walks through installing both on RHEL […]

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Common Problems 115994

Ubuntu 26.04 LTS – snap refresh stuck and applications fail to update – Fix & Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 19 May 2026 Affected versions: Ubuntu 26.04 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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Common Problems 115568

RHEL 7 service Docker Fails to Start After Kernel Update

🟡 Medium   ⏱ 5–30 min  Last verified: 20 May 2026 📖 ~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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Common Problems 114633

chronyd Not Syncing Time on RHEL 9 edition

🟡 Medium   ⏱ 5–30 min  Last verified: 19 May 2026 📖 ~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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Common Problems 113465

Windows Server 2012 R2 — DHCP scope exhaustion caused by stale reservations and delayed lease reclamation — Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 19 May 2026 Affected versions: Windows Server 2012 R2 📖 ~2 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 […]

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