DNS

Common Problems 116122

Ubuntu 26.04 LTS – systemd-resolved stub resolver returns intermittent DNS failures – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 29 June 2026 Affected versions: Ubuntu 26.04 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 113955

RHEL 10 – Podman container cannot bind privileged port due to SELinux context

🟠 High   ⏱ 5–30 min  Last verified: 29 June 2026 Affected versions: RHEL 10 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 & […]

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Common Problems 116117

Ubuntu 26.04 LTS – chrony service not syncing after VM resume – Fix & Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 29 June 2026 Affected versions: Ubuntu 26.04 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 115895

Ubuntu 26.04 LTS – APT lock file prevents package installs – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 29 June 2026 Affected versions: Ubuntu 26.04 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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Ubuntu 18.04 — dnsmasq — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 18.04

Ubuntu 18.04 — dnsmasq — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 29 June 2026 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-8268-1 Related CVEs: CVE-2026-4890 CVE-2026-4891 CVE-2026-2291 CVE-2026-4892 CVE-2026-5172 CVE-2026-4893 CVE-2023-28450 CVE-2023-50387  +12 more Upstream summary: Andrew S. Fasano, Royce M, and Hugo Martinez Ray discovered that Dnsmasq did not allocate […]

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Common Problems 114008

RHEL 10 RPM Database Corruption Prevents Package Operations

🔴 Critical   ⏱ 5–30 min  Last verified: 28 June 2026 Affected versions: RHEL 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 edge — unbound — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Alpine Linux edge

Alpine Linux edge — unbound — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Alpine Linux edge / fixed in 1.9.5-r0 📖 ~4 min read  •  Source: Alpine secdb entry — unbound 1.9.5-r0 Related CVEs: CVE-2019-18934 CVE-2019-16866 CVE-2026-33278 CVE-2026-40622 CVE-2026-41292 CVE-2026-42534 CVE-2026-42923 CVE-2026-42944  +12 more Upstream summary: Alpine main repository for vedge ships unbound 1.9.5-r0 which […]

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Common Problems 114547

auditd Stops Logging Because Disk Threshold Is Hit

🟡 Medium   ⏱ 5–30 min  Last verified: 28 June 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 116036

Time Drift and NTP Synchronization Problems

🟡 Medium   ⏱ 5–30 min  Last verified: 28 June 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 115947

Ubuntu 26.04 LTS – systemd-resolved DNS lookup intermittently fails – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 28 June 2026 Affected versions: Ubuntu 26.04 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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