Kernel Drivers

Oracle Linux 8 — Unbreakable Enterprise kernel — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — Unbreakable Enterprise kernel — vulnerability — patch and remediation guide (ELSA-2021-9306)

  • November 4, 2021
  • Linux
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🟠 High   ⏱ 15–60 min  Last verified: 4 November 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2021-9306 Related CVEs: CVE-2020-28374 CVE-2021-23133 CVE-2021-29154 CVE-2021-31916 CVE-2020-36310 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative […]

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How to Set Up SUSE Security Module on SLES 15 — step-by-step SUSE Linux Enterprise 15 tutorial on Progressive Robot

How to Set Up SUSE Security Module on SLES 15

Introduction This tutorial covers How to Set Up SUSE Security Module on SLES 15 on SLES 15. SLES 15 (SUSE Linux Enterprise Server 16) is SUSE’s enterprise-grade Linux distribution. It uses the zypper package manager, AppArmor for mandatory access control, and systemctl for service management. Prerequisites Ensure your SLES 15 system is up to date: […]

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Amazon Linux 2 — kernel-livepatch-4.14.232-177.418 — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Amazon Linux 2

Amazon Linux 2 — kernel-livepatch-4.14.232-177.418 — multiple vulnerabilities (2 CVEs) — patch and remediation guide

  • November 3, 2021
  • Linux
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🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Amazon Linux 2 📖 ~4 min read  •  Source: Amazon Linux advisory ALAS2LIVEPATCH-2021-060 Related CVEs: CVE-2021-40490 CVE-2021-33909 Upstream summary: No CVE associated with this advisory Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution […]

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How to Set Up VLAN Tagging on FreeBSD 13 — step-by-step FreeBSD 13 tutorial on Progressive Robot

How to Set Up VLAN Tagging on FreeBSD 13

  • November 2, 2021
  • FreeBSD
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Introduction How to Set Up VLAN Tagging on FreeBSD 13 is a core administration task for any FreeBSD 13 server operator. FreeBSD 13 ships with the 15.0-RELEASE kernel, ZFS as the default root filesystem, Capsicum capability sandboxing improvements, and an updated ports tree. Unlike Linux distributions, FreeBSD uses rc(8) for service management, pf for packet […]

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Oracle Linux 8 — kernel security, bug fix, and — enhancement update — new behaviour and fixes — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — kernel security, bug fix, and — enhancement update — new behaviour and fixes (ELSA-2022-0825)

  • November 1, 2021
  • Linux
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🟠 High   ⏱ 15–60 min  Last verified: 1 November 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2022-0825 Related CVEs: CVE-2022-0516 CVE-2022-0435 CVE-2022-0847 CVE-2022-22942 CVE-2022-0492 CVE-2021-4154 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – […]

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Common Problems 121603

Debian 9: Docker daemon fails after kernel or cgroup changes

  • November 1, 2021
  • Linux
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🟠 High   ⏱ 5–30 min  Last verified: 1 November 2021 Affected versions: Debian 9 📖 ~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 117537

Ubuntu 20.04 LTS – kernel update leaves system stuck on old version – Fix & Prevention

  • November 1, 2021
  • Linux
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🟡 Medium   ⏱ 5–30 min  Last verified: 1 November 2021 Affected versions: Ubuntu 20.04 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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How to Configure Windows Server 2019 Windows Containers — step-by-step Windows Server 2019 tutorial on Progressive Robot

How to Configure Windows Server 2019 Windows Containers

How to Configure Windows Server 2019 Windows Containers Windows Containers are a lightweight virtualization technology in Windows Server 2019 that package applications and their dependencies into isolated units. Unlike Hyper-V containers, Windows containers share the host OS kernel, making them faster to start and more resource-efficient. They are fully compatible with Docker tooling and can […]

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SLES 15 — kernel-livepatch — multiple vulnerabilities (10 CVEs) — patch and remediation guide — diagnosis and fix on SLES 15

SLES 15 — kernel-livepatch — multiple vulnerabilities (10 CVEs) — patch and remediation guide

  • October 31, 2021
  • Linux
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🟠 High   ⏱ 15–60 min  Last verified: 31 October 2021 Affected versions: SLES 15 📖 ~4 min read  •  Source: SUSE advisory SUSE-SU-2017:3210-1 (see also SUSE bugzilla) Related CVEs: CVE-2017-1000405 CVE-2021-4028 CVE-2021-31440 CVE-2018-12904 CVE-2019-5108 CVE-2018-15471 CVE-2019-13272 CVE-2020-13233  +2 more Upstream summary: The Linux Kernel versions 2.6.38 through 4.14 have a problematic use of pmd_mkdirty() […]

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How to Set Up Active Directory Domain Services on Windows Server 2019 — step-by-step Windows Server 2019 tutorial on Progressive Robot

How to Set Up Active Directory Domain Services on Windows Server 2019

How to Set Up Active Directory Domain Services on Windows Server 2019 Active Directory Domain Services (AD DS) is the cornerstone of Windows enterprise identity management. It provides centralized authentication and authorization using Kerberos and LDAP, enables Group Policy for configuration management, and creates a hierarchical structure of domains, trees, and forests. This guide walks […]

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