Common Problems

Arch Linux — vlc — multiple vulnerabilities (8 CVEs) — patch and remediation guide — diagnosis and fix on Arch Linux

Arch Linux — vlc — multiple vulnerabilities (8 CVEs) — patch and remediation guide

🔴 Critical   ⏱ 15–90 min  Last verified: 25 May 2026 Affected versions: Arch Linux (rolling release) 📖 ~4 min read  •  Source: Arch ASA ASA-201906-22 Related CVEs: CVE-2019-5439 CVE-2019-12874 CVE-2017-9300 CVE-2017-10699 CVE-2017-8312 CVE-2017-8311 CVE-2017-8310 CVE-2020-26664 Upstream summary: Type: arbitrary code execution. Status: Fixed. Affected: 3.0.6-13. Fixed in: 3.0.7.1-1. Group: AVG-998. Table of contents Symptom […]

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Common Problems 118624

Ubuntu 16.04 LTS UFW blocks expected traffic after rule changes

🟡 Medium   ⏱ 5–30 min  Last verified: 2 January 2021 📖 ~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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Oracle Linux 8 — java-11-openjdk — security and stability fixes — required update — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — java-11-openjdk — security and stability fixes — required update (ELSA-2022-7012)

🟡 Medium   ⏱ 10–30 min  Last verified: 2 January 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2022-7012 Related CVEs: CVE-2022-39399 CVE-2022-21624 CVE-2022-21626 CVE-2022-21618 CVE-2022-21619 CVE-2022-21628 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – […]

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Common Problems 118124

Ubuntu 18.04 LTS – NFS mount hangs and causes boot timeout

🟠 High   ⏱ 5–30 min  Last verified: 2 January 2021 Affected versions: Ubuntu 18.04 LTS Ubuntu 18.04 Ubuntu 18.04.6 📖 ~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 […]

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Common Problems 117449

Ubuntu 20.04 slow boot due to long systemd startup

🟡 Medium   ⏱ 5–30 min  Last verified: 2 January 2021 📖 ~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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Oracle Linux 8 — pcs — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — pcs — vulnerability — patch and remediation guide (ELSA-2020-5724)

🟠 High   ⏱ 15–60 min  Last verified: 2 January 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2020-5724 Related CVEs: CVE-2020-10663 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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Oracle Linux 8 — virt:kvm_utils3 — bug fix update — issues resolved — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — virt:kvm_utils3 — bug fix update — issues resolved (ELSA-2024-12536)

🟡 Medium   ⏱ 10–30 min  Last verified: 1 January 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2024-12536 Related CVEs: CVE-2024-1441 CVE-2024-3447 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & […]

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Common Problems 119155

Ubuntu 14.04 LTS – LightDM login loop prevents desktop access

🟠 High   ⏱ 5–30 min  Last verified: 1 January 2021 Affected versions: Ubuntu 14.04 LTS Ubuntu 14.04 Ubuntu 14.04.6 📖 ~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 […]

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Common Problems 113397

Windows Server 2012 R2 — winget install fails with package signature verification error — Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 1 January 2021 Affected versions: Windows Server 2012 R2 📖 ~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 […]

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Common Problems 113092

Windows Server 2016 — Windows Firewall ruleset regression blocks east-west traffic after GPO refresh — Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 1 January 2021 Affected versions: Windows Server 2016 📖 ~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 Errors […]

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