Logging Monitoring

Common Problems 111817

Windows Server 2022 — Hyper-V live migration fails due to constrained delegation misconfig — Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 24 June 2023 Affected versions: Windows Server 2022 📖 ~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 3.18 — recutils — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Alpine Linux 3.18

Alpine Linux 3.18 — recutils — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Alpine Linux 3.18 / fixed in 1.9-r0 📖 ~4 min read  •  Source: Alpine secdb entry — recutils 1.9-r0 Related CVEs: CVE-2021-46019 CVE-2021-46022 Upstream summary: Alpine community repository for vv3.18 ships recutils 1.9-r0 which addresses CVE-2021-46019. Table of contents Symptom & Impact […]

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How to Set Up Kea DHCP Server on Debian 12 — step-by-step Debian 12 tutorial on Progressive Robot

How to Set Up Kea DHCP Server on Debian 12

Introduction Debian 12 Bookworm is built around the ethos of stability and free software. Setting up set up kea dhcp server on debian 12 on Bookworm leverages the same proven Debian packaging system that powers millions of servers worldwide, while benefiting from the latest upstream releases included in the Bookworm freeze. Follow each step carefully […]

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

Oracle Linux 8 — glibc — vulnerability — patch and remediation guide (ELSA-2022-9234)

🟡 Medium   ⏱ 10–30 min  Last verified: 24 June 2023 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2022-9234 Related CVEs: CVE-2022-23219 CVE-2022-23218 CVE-2021-3999 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification […]

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NetBSD 9.4 — keystone — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on NetBSD 9.4

NetBSD 9.4 — keystone — multiple vulnerabilities (2 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-2020-36405 CVE-2020-36404 Upstream summary: pkgsrc audit-packages flagged keystone-[0-9]* for vulnerability class 'use-after-free'. Reference: https://nvd.nist.gov/vuln/detail/CVE-2020-36405 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step […]

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

Oracle Linux 8 — fwupd — vulnerability — patch and remediation guide (ELSA-2023-7189)

🟡 Medium   ⏱ 10–30 min  Last verified: 24 June 2023 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2023-7189 Related CVEs: CVE-2022-3287 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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Oracle Linux 8 — curl — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — curl — vulnerability — patch and remediation guide (ELSA-2023-1140)

🟡 Medium   ⏱ 10–30 min  Last verified: 24 June 2023 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2023-1140 Related CVEs: CVE-2023-23916 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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Alpine Linux 3.18 — cfengine — vulnerability — patch and remediation guide — diagnosis and fix on Alpine Linux 3.18

Alpine Linux 3.18 — cfengine — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Alpine Linux 3.18 / fixed in 3.12.2-r0 📖 ~4 min read  •  Source: Alpine secdb entry — cfengine 3.12.2-r0 Related CVEs: CVE-2019-9929 Upstream summary: Alpine community repository for vv3.18 ships cfengine 3.12.2-r0 which addresses CVE-2019-9929. Table of contents Symptom & Impact Environment […]

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Common Problems 114448

SSH Login Delay Caused By Reverse DNS Lookups

🟡 Medium   ⏱ 5–30 min  Last verified: 24 June 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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CentOS Stream 9 — libXpm — multiple vulnerabilities (5 CVEs) — patch and remediation guide — diagnosis and fix on CentOS Stream 9

CentOS Stream 9 — libXpm — multiple vulnerabilities (5 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 24 June 2023 Affected versions: CentOS Stream 9 📖 ~4 min read  •  Source: AlmaLinux/RHEL advisory ALSA-2023:0383 Related CVEs: CVE-2022-44617 CVE-2022-46285 CVE-2022-4883 CVE-2023-43788 CVE-2023-43789 Upstream summary: X.Org X11 libXpm runtime library. Security Fix(es): * libXpm: compression commands depend on $PATH (CVE-2022-4883) * libXpm: Runaway loop on width […]

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