Common Problems

Common Problems 118025

Ubuntu 18.04 LTS – snapd services fail and snap apps do not launch

🟡 Medium   ⏱ 5–30 min  Last verified: 30 September 2020 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 117591

Ubuntu 20.04 LTS – MySQL service fails to start after crash with InnoDB log mismatch – Fix & Prevention

🔴 Critical   ⏱ 5–30 min  Last verified: 30 September 2020 Affected versions: Ubuntu 20.04 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 115574

Kernel Updated but Old Kernel Boots by Default

🟡 Medium   ⏱ 5–30 min  Last verified: 30 September 2020 📖 ~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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openSUSE Tumbleweed — texlive-devel — vulnerability — patch and remediation guide — diagnosis and fix on openSUSE Tumbleweed

openSUSE Tumbleweed — texlive-devel — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: openSUSE Tumbleweed 📖 ~4 min read  •  Source: SUSE advisory openSUSE-SU-2020:0804-1 (see also SUSE bugzilla) Related CVEs: CVE-2020-8017 Upstream summary: A Race Condition Enabling Link Following vulnerability in the cron job shipped with texlive-filesystem of SUSE Linux Enterprise Module for Desktop Applications […]

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Common Problems 113104

Windows Server 2016 — RID master pool exhaustion approaching: new objects refused soon — Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 30 September 2020 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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Amazon Linux 2 — exempi — multiple vulnerabilities (6 CVEs) — patch and remediation guide — diagnosis and fix on Amazon Linux 2

Amazon Linux 2 — exempi — multiple vulnerabilities (6 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Amazon Linux 2 📖 ~4 min read  •  Source: Amazon Linux advisory ALAS2-2023-2260 Related CVEs: CVE-2020-18651 CVE-2017-18233 CVE-2017-18234 CVE-2017-18236 CVE-2017-18238 CVE-2018-7730 Upstream summary: Buffer Overflow vulnerability in function ID3_Support::ID3v2Frame::getFrameValue in exempi 2.5.0 and earlier allows remote attackers to cause a denial of […]

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Amazon Linux 2 — velocity — vulnerability — patch and remediation guide — diagnosis and fix on Amazon Linux 2

Amazon Linux 2 — velocity — vulnerability — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Amazon Linux 2 📖 ~4 min read  •  Source: Amazon Linux advisory ALAS2-2021-1690 Related CVEs: CVE-2020-13936 Upstream summary: A flaw was found in velocity. An attacker, able to modify Velocity templates, may execute arbitrary Java code or run arbitrary system commands with […]

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Oracle Linux 8 — microcode_ctl security, — bug-fix and enhancement update — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — microcode_ctl security, — bug-fix and enhancement update (ELSA-2020-2431)

🟡 Medium   ⏱ 10–30 min  Last verified: 29 September 2020 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2020-2431 Related CVEs: CVE-2020-0549 CVE-2020-0543 CVE-2020-0548 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 119141

Ubuntu 14.04 LTS JVM processes crash with out of memory errors

🟠 High   ⏱ 5–30 min  Last verified: 29 September 2020 Affected versions: 14.04 📖 ~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 […]

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Common Problems 118055

Ubuntu 18.04 LTS – systemd service enters restart loop

🟠 High   ⏱ 5–30 min  Last verified: 29 September 2020 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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