Common Problems

Ubuntu 20.04 — zbar — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 20.04

Ubuntu 20.04 — zbar — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 20 November 2023 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-7118-1 Related CVEs: CVE-2023-40889 CVE-2023-40890 Upstream summary: It was discovered that ZBar did not properly handle certain QR codes. If a user or automated system using ZBar were tricked into […]

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NetBSD 9.4 — bitchx — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on NetBSD 9.4

NetBSD 9.4 — bitchx — multiple vulnerabilities (3 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: NetBSD 9.4 📖 ~4 min read  •  Source: pkgsrc audit-packages entry Related CVEs: CVE-2007-3360 CVE-2007-4584 CVE-2007-5839 Upstream summary: pkgsrc audit-packages flagged bitchx<1.0.3.17nb1 for vulnerability class 'remote-user-shell'. Reference: http://www.securityfocus.com/bid/2087 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage […]

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AlmaLinux 8 — samba — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on AlmaLinux 8

AlmaLinux 8 — samba — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🔴 Critical   ⏱ 15–90 min  Last verified: 25 May 2026 Affected versions: AlmaLinux 8 📖 ~4 min read  •  Source: AlmaLinux ALSA ALSA-2022:0332 Related CVEs: CVE-2021-44142 CVE-2022-38023 CVE-2016-2124 CVE-2020-25717 CVE-2021-23192 CVE-2023-3961 CVE-2023-4091 CVE-2023-42669  +12 more Upstream summary: Samba is an open-source implementation of the Server Message Block (SMB) protocol and the related Common Internet […]

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Common Problems 124587

Oracle Linux 9 – Common Problem 013 – Diagnosis and Fix

🟠 High   ⏱ 5–30 min  Last verified: 19 November 2023 Affected versions: Oracle Linux 9 📖 ~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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NetBSD 9.4 — py-configobj — vulnerability — patch and remediation guide — diagnosis and fix on NetBSD 9.4

NetBSD 9.4 — py-configobj — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: NetBSD 9.4 📖 ~4 min read  •  Source: pkgsrc audit-packages entry Related CVEs: CVE-2023-26112 Upstream summary: pkgsrc audit-packages flagged py{27,37,38,39,310,311,312}-configobj<5.0.8nb1 for vulnerability class 'denial-of-service'. Reference: https://nvd.nist.gov/vuln/detail/CVE-2023-26112 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis […]

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Common Problems 120111

Debian 12 – unattended-upgrades Leaves Pending Reboot Drift – Controlled Patch Flow

🟡 Medium   ⏱ 5–30 min  Last verified: 19 November 2023 Affected versions: Debian 12 📖 ~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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NetBSD 9.4 — libxkbcommon — multiple vulnerabilities (11 CVEs) — patch and remediation guide — diagnosis and fix on NetBSD 9.4

NetBSD 9.4 — libxkbcommon — multiple vulnerabilities (11 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: NetBSD 9.4 📖 ~4 min read  •  Source: pkgsrc audit-packages entry Related CVEs: CVE-2018-15853 CVE-2018-15854 CVE-2018-15855 CVE-2018-15856 CVE-2018-15857 CVE-2018-15858 CVE-2018-15859 CVE-2018-15861  +3 more Upstream summary: pkgsrc audit-packages flagged libxkbcommon<0.8.1 for vulnerability class 'denial-of-service'. Reference: https://nvd.nist.gov/vuln/detail/CVE-2018-15853 Table of contents Symptom & Impact Environment […]

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Common Problems 117035

Ubuntu 22.04 LTS – NGINX fails config test due to duplicate server_name – Fix & Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 19 November 2023 Affected versions: Ubuntu 22.04 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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NetBSD 9.4 — ruby-activerecord60 — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on NetBSD 9.4

NetBSD 9.4 — ruby-activerecord60 — multiple vulnerabilities (3 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: NetBSD 9.4 📖 ~4 min read  •  Source: pkgsrc audit-packages entry Related CVEs: CVE-2021-22880 CVE-2022-32224 CVE-2023-22794 Upstream summary: pkgsrc audit-packages flagged ruby{25,26,27}-activerecord60<6.0.3.5 for vulnerability class 'cross-site-request-forgery'. Reference: https://nvd.nist.gov/vuln/detail/CVE-2021-22880 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage […]

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Common Problems 115040

Rsyslog not writing expected logs to file

🟡 Medium   ⏱ 5–30 min  Last verified: 19 November 2023 📖 ~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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