Security Hardening

Fedora 42 — lemonldap-ng — vulnerability — patch and remediation guide — diagnosis and fix on Fedora 42

Fedora 42 — lemonldap-ng — vulnerability — patch and remediation guide

  • July 23, 2026
  • Linux
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🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Fedora 42 📖 ~4 min read  •  Source: Fedora update FEDORA-2026-69743812a7 Upstream summary: Update to 2.22.3 https://projects.ow2.org/view/lemonldap-ng/lemonldap-ng-2-22-3-is-out/ 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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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-2026-50280)

  • July 23, 2026
  • Linux
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🟠 High   ⏱ 15–60 min  Last verified: 23 July 2026 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2026-50280 Related CVEs: CVE-2026-46333 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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Common Problems 116068

journalctl missing persistent logs after reboot

🟡 Medium   ⏱ 5–30 min  Last verified: 23 July 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 114492

RHEL 9 Kernel Update Installed but Old Kernel Still Boots

  • July 23, 2026
  • Linux
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🟡 Medium   ⏱ 5–30 min  Last verified: 23 July 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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Debian 13 — systemd — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Debian 13

Debian 13 — systemd — multiple vulnerabilities (20 CVEs) — patch and remediation guide

  • July 23, 2026
  • Linux
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🟠 High   ⏱ 15–60 min  Last verified: 23 July 2026 Affected versions: Debian 13 (trixie) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2012-0871 CVE-2012-1101 CVE-2012-1174 CVE-2013-4327 CVE-2013-4391 CVE-2013-4392 CVE-2013-4393 CVE-2013-4394  +12 more Upstream summary: The session_link_x11_socket function in login/logind-session.c in systemd-logind in systemd, possibly 37 and earlier, allows local users […]

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Ubuntu 20.04 — linux — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 20.04

Ubuntu 20.04 — linux — multiple vulnerabilities (20 CVEs) — patch and remediation guide

  • July 23, 2026
  • Linux
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🟠 High   ⏱ 15–60 min  Last verified: 23 July 2026 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-8273-1 Related CVEs: CVE-2024-50304 CVE-2026-23112 CVE-2026-23209 CVE-2026-31431 CVE-2026-31504 CVE-2026-31533 CVE-2026-43033 CVE-2026-43077  +12 more Upstream summary: Several security issues were discovered in the Linux kernel. An attacker could possibly use these […]

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Debian 13 — cups — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Debian 13

Debian 13 — cups — multiple vulnerabilities (20 CVEs) — patch and remediation guide

  • July 23, 2026
  • Linux
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🟠 High   ⏱ 15–60 min  Last verified: 23 July 2026 Affected versions: Debian 13 (trixie) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2002-1366 CVE-2002-1367 CVE-2002-1368 CVE-2002-1369 CVE-2002-1371 CVE-2002-1372 CVE-2002-1383 CVE-2002-1384  +12 more Upstream summary: Common Unix Printing System (CUPS) 1.1.14 through 1.1.17 allows local users with lp privileges to create […]

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AlmaLinux 8 — python2-pycairo — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on AlmaLinux 8

AlmaLinux 8 — python2-pycairo — multiple vulnerabilities (20 CVEs) — patch and remediation guide

  • July 23, 2026
  • Linux
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🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: AlmaLinux 8 📖 ~4 min read  •  Source: AlmaLinux ALSA ALSA-2026:17533 Related CVEs: CVE-2026-4150 CVE-2026-4153 CVE-2026-4154 CVE-2026-4887 CVE-2026-0797 CVE-2026-2044 CVE-2026-2045 CVE-2026-2048  +12 more Upstream summary: The GIMP (GNU Image Manipulation Program) is an image composition and editing program. GIMP provides a large […]

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How to Enable SSL/TLS with Let's Encrypt on Apache2 on FreeBSD 15 — step-by-step FreeBSD 15 tutorial on Progressive Robot

How to Enable SSL/TLS with Let’s Encrypt on Apache2 on FreeBSD 15

  • July 23, 2026
  • FreeBSD
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Introduction How to Enable SSL/TLS with Let’s Encrypt on Apache2 on FreeBSD 15 is a core administration task for any FreeBSD 15 server operator. FreeBSD 15 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, […]

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How to Set Up SLES 16 with KVM Virtualization — step-by-step SUSE Linux Enterprise 16 tutorial on Progressive Robot

How to Set Up SLES 16 with KVM Virtualization

Introduction This tutorial covers How to Set Up SLES 16 with KVM Virtualization on SLES 16. SLES 16 (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 16 system is up to date: zypper […]

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