Common Problems

Common Problems 117478

Ubuntu 20.04 LTS – system fails to boot after kernel update

🔴 Critical   ⏱ 5–30 min  Last verified: 23 March 2021 Affected versions: Ubuntu 20.04 LTS Ubuntu 20.04 Ubuntu 20.04.6 📖 ~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 112435

Windows Server 2019 — MSU update package fails to install with hash mismatch corrupt error — Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 23 March 2021 Affected versions: Windows Server 2019 📖 ~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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Oracle Linux 8 — postgresql:10 — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — postgresql:10 — vulnerability — patch and remediation guide (ELSA-2022-1830)

🟡 Medium   ⏱ 10–30 min  Last verified: 23 March 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2022-1830 Related CVEs: CVE-2021-23214 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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Amazon Linux 2 — kernel-livepatch-4.14.203-156.332 — vulnerability — patch and remediation guide — diagnosis and fix on Amazon Linux 2

Amazon Linux 2 — kernel-livepatch-4.14.203-156.332 — 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 ALAS2LIVEPATCH-2021-035 Related CVEs: CVE-2020-28374 Upstream summary: A flaw was found in the Linux kernel's implementation of the Linux SCSI target host, where an authenticated attacker could write to any block […]

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openSUSE Tumbleweed — guix — vulnerability — patch and remediation guide — diagnosis and fix on openSUSE Tumbleweed

openSUSE Tumbleweed — guix — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: openSUSE Tumbleweed 📖 ~4 min read  •  Source: SUSE security advisory (see also SUSE bugzilla) Related CVEs: CVE-2021-27851 Upstream summary: A security vulnerability that can lead to local privilege escalation has been found in 'guix-daemon'. It affects multi-user setups in which 'guix-daemon' […]

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Oracle Linux 8 — 5 Known Issues — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — 5 Known Issues

🟠 High   ⏱ 5–30 min  Last verified: 22 March 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: Oracle Bug OLRNT-ol8-issues-known 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 […]

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Common Problems 113403

Windows Server 2012 R2 — Boot stops with winload.efi missing or corrupt — Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 22 March 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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FreeBSD 12 — chrony — multiple vulnerabilities (4 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — chrony — multiple vulnerabilities (4 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 22 March 2021 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: chrony <= 3.5.1 data corruption through symlink vulnerability writing the pidfile Related CVEs: CVE-2015-1821 CVE-2015-1822 CVE-2015-1853 CVE-2020-14367 Upstream summary: Miroslav Lichvar reports: chrony-3.5.1 […] fixes a security issue in writing […]

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Alpine Linux edge — spamassassin — multiple vulnerabilities (9 CVEs) — patch and remediation guide — diagnosis and fix on Alpine Linux edge

Alpine Linux edge — spamassassin — multiple vulnerabilities (9 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Alpine Linux edge / fixed in 3.4.5-r0 📖 ~4 min read  •  Source: Alpine secdb entry — spamassassin 3.4.5-r0 Related CVEs: CVE-2020-1946 CVE-2020-1930 CVE-2020-1931 CVE-2018-11805 CVE-2019-12420 CVE-2016-1238 CVE-2017-15705 CVE-2018-11780  +1 more Upstream summary: Alpine main repository for vedge ships spamassassin 3.4.5-r0 which […]

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