DNS

Common Problems 113896

RHEL 10 DNF Metadata Checksum Mismatch During Updates

🟡 Medium   ⏱ 5–30 min  Last verified: 19 May 2026 Affected versions: RHEL 10.0 RHEL 10.1 📖 ~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 126972

CentOS Stream 10 – Common Problem 126 – Diagnosis and Fix

🟠 High   ⏱ 5–30 min  Last verified: 19 May 2026 Affected versions: CentOS Stream 10 📖 ~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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Alpine Linux 3.20 — pdns — multiple vulnerabilities (10 CVEs) — patch and remediation guide — diagnosis and fix on Alpine Linux 3.20

Alpine Linux 3.20 — pdns — multiple vulnerabilities (10 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Alpine Linux 3.20 / fixed in 4.6.1-r0 📖 ~4 min read  •  Source: Alpine secdb entry — pdns 4.6.1-r0 Related CVEs: CVE-2022-27227 CVE-2021-36754 CVE-2020-17482 CVE-2019-3871 CVE-2018-10851 CVE-2018-14626 CVE-2019-10203 CVE-2019-10162  +2 more Upstream summary: Alpine community repository for vv3.20 ships pdns 4.6.1-r0 which […]

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openSUSE Tumbleweed — pdns-recursor — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on openSUSE Tumbleweed

openSUSE Tumbleweed — pdns-recursor — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: openSUSE Tumbleweed 📖 ~4 min read  •  Source: SUSE security advisory (see also SUSE bugzilla) Related CVEs: CVE-2025-30192 CVE-2024-25590 CVE-2024-25583 CVE-2023-22617 CVE-2018-16855 CVE-2023-26437 CVE-2022-37428 CVE-2009-4009  +12 more Upstream summary: An attacker spoofing answers to ECS enabled requests sent out by the Recursor […]

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Alpine Linux 3.20 — pdns-recursor — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Alpine Linux 3.20

Alpine Linux 3.20 — pdns-recursor — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Alpine Linux 3.20 / fixed in 5.0.9-r0 📖 ~4 min read  •  Source: Alpine secdb entry — pdns-recursor 5.0.9-r0 Related CVEs: CVE-2024-25590 CVE-2024-25583 CVE-2023-50387 CVE-2023-50868 CVE-2023-22617 CVE-2022-37428 CVE-2022-27227 CVE-2020-25829  +12 more Upstream summary: Alpine community repository for vv3.20 ships pdns-recursor 5.0.9-r0 which […]

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openSUSE Tumbleweed — unbound — multiple vulnerabilities (14 CVEs) — patch and remediation guide — diagnosis and fix on openSUSE Tumbleweed

openSUSE Tumbleweed — unbound — multiple vulnerabilities (14 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: openSUSE Tumbleweed 📖 ~4 min read  •  Source: SUSE advisory RHSA-2025:11849 (see also SUSE bugzilla) Related CVEs: CVE-2025-5994 CVE-2022-3204 CVE-2019-16866 CVE-2019-18934 CVE-2020-12662 CVE-2020-12663 CVE-2025-11411 CVE-2024-8508  +6 more Upstream summary: A multi-vendor cache poisoning vulnerability named 'Rebirthday Attack' has been discovered in caching […]

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NetBSD 9.4 — adns — multiple vulnerabilities (7 CVEs) — patch and remediation guide — diagnosis and fix on NetBSD 9.4

NetBSD 9.4 — adns — multiple vulnerabilities (7 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-2017-9103 CVE-2017-9105 CVE-2017-9106 CVE-2017-9107 CVE-2017-9108 CVE-2017-9109 CVE-2017-9104 Upstream summary: pkgsrc audit-packages flagged adns<1.5.2 for vulnerability class 'buffer-overflow'. Reference: https://nvd.nist.gov/vuln/detail/CVE-2017-9103 Table of contents Symptom & Impact Environment & Reproduction Root […]

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Common Problems 115623

tuned Profile Misconfiguration Causes Performance Drop

🟡 Medium   ⏱ 5–30 min  Last verified: 20 May 2026 📖 ~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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Common Problems 118630

Ubuntu 16.04 LTS GRUB update fails after manual disk layout changes

🔴 Critical   ⏱ 5–30 min  Last verified: 20 May 2026 Affected versions: 16.04 📖 ~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 114628

RHEL 9 emergency mode triggered by fstab mount errors

🟡 Medium   ⏱ 5–30 min  Last verified: 20 May 2026 📖 ~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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