Common Problems

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

Oracle Linux 8 — brotli — vulnerability — patch and remediation guide (ELSA-2021-1702)

🟡 Medium   ⏱ 10–30 min  Last verified: 22 April 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2021-1702 Related CVEs: CVE-2020-8927 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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openSUSE Tumbleweed — crawl — vulnerability — patch and remediation guide — diagnosis and fix on openSUSE Tumbleweed

openSUSE Tumbleweed — crawl — vulnerability — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: openSUSE Tumbleweed 📖 ~4 min read  •  Source: SUSE advisory openSUSE-SU-2020:0549-1 (see also SUSE bugzilla) Related CVEs: CVE-2020-11722 Upstream summary: Dungeon Crawl Stone Soup (aka DCSS or crawl) before 0.25 allows remote attackers to execute arbitrary code via Lua bytecode embedded in […]

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Oracle Linux 8 — .NET Core 3.1 security and bugfix update — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — .NET Core 3.1 security and bugfix update

🔴 Critical   ⏱ 15–90 min  Last verified: 21 April 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2020-2954 Related CVEs: CVE-2020-1147 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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IBM AIX 7.1 — CVE-2021-29832 — xss — patch and remediation guide — diagnosis and fix on IBM AIX 7.1

IBM AIX 7.1 — CVE-2021-29832 — xss — patch and remediation guide

🟡 Medium   ⏱ 15–45 min  Last verified: 21 April 2021 Affected versions: IBM AIX 7.1 📖 ~4 min read  •  Source: NVD CVE-2021-29832, IBM Support Bulletin CVE: CVE-2021-29832 NVD summary: IBM Jazz for Service Management 1.1.3.10 and IBM Tivoli Netcool/OMNIbus_GUI is vulnerable to stored cross-site scripting. This vulnerability allows users to embed arbitrary JavaScript […]

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Common Problems 118519

Ubuntu 16.04 LTS MySQL Refuses Connections After Crash Recovery

🟠 High   ⏱ 5–30 min  Last verified: 21 April 2021 Affected versions: 16.04 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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FreeBSD 13 — rubygem-rexml — vulnerability — patch and remediation guide — diagnosis and fix on FreeBSD 13

FreeBSD 13 — rubygem-rexml — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 21 April 2021 Affected versions: FreeBSD 13 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: ruby — XML round-trip vulnerability in REXML Related CVEs: CVE-2021-28965 Upstream summary: Juho Nurminen reports: When parsing and serializing a crafted XML document, REXML gem (including the one bundled with […]

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Common Problems 118065

Ubuntu 18.04 LTS – cron jobs do not run at scheduled times

🟡 Medium   ⏱ 5–30 min  Last verified: 21 April 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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FreeBSD 13 — tmux — security advisory — patch and remediation guide — diagnosis and fix on FreeBSD 13

FreeBSD 13 — tmux — security advisory — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 21 April 2021 Affected versions: FreeBSD 13 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: tmux — stack overflow in CSI parsing Upstream summary: Nicholas Marriott reports: tmux has a stack overflow in CSI parsing. Table of contents Symptom & Impact Environment & Reproduction Root […]

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AlmaLinux 8 — gnome-settings-daemon — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on AlmaLinux 8

AlmaLinux 8 — gnome-settings-daemon — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: AlmaLinux 8 📖 ~4 min read  •  Source: AlmaLinux ALSA ALSA-2021:4381 Related CVEs: CVE-2020-13558 CVE-2020-24870 CVE-2020-27918 CVE-2020-29623 CVE-2020-36241 CVE-2021-1765 CVE-2021-1788 CVE-2021-1789  +12 more Upstream summary: GNOME is the default desktop environment of AlmaLinux. The following packages have been upgraded to a later […]

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Common Problems 117394

Ubuntu 20.04 LTS APT Lock Error Blocks Package Updates

🟡 Medium   ⏱ 5–30 min  Last verified: 21 April 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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