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Windows Server 2019 — KB5055518 — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Windows Server 2019

Windows Server 2019 — KB5055518 — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🔴 Critical   ⏱ 15–90 min  Last verified: 25 May 2026 Affected versions: Windows Server 2019 📖 ~4 min read  •  Source: Microsoft KB5055518 • MSRC update-guide entry Related CVEs: CVE-2025-26663 CVE-2025-26686 CVE-2025-26670 CVE-2025-27491 CVE-2023-40547 CVE-2025-26665 CVE-2025-26666 CVE-2025-26669  +12 more Affected components: Windows Server 2019 (Server Core installation) Microsoft summary: Use after free in Windows […]

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How to Configure Apache with mod_pagespeed on SLES 16 — step-by-step SUSE Linux Enterprise 16 tutorial on Progressive Robot

How to Configure Apache with mod_pagespeed on SLES 16

Introduction This tutorial covers How to Configure Apache with mod_pagespeed on SLES 16 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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Ubuntu 20.04 — modsecurity-apache — multiple vulnerabilities (5 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 20.04

Ubuntu 20.04 — modsecurity-apache — multiple vulnerabilities (5 CVEs) — patch and remediation guide

  • November 16, 2025
  • Linux
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🟡 Medium   ⏱ 10–30 min  Last verified: 16 November 2025 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-7567-1 Related CVEs: CVE-2025-47947 CVE-2025-48866 CVE-2021-42717 CVE-2022-48279 CVE-2023-24021 Upstream summary: Simon Studer discovered that ModSecurity incorrectly handled certain JSON objects. An attacker could possibly use this issue to cause a […]

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Ubuntu 20.04 — libcryptx-perl — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 20.04

Ubuntu 20.04 — libcryptx-perl — multiple vulnerabilities (3 CVEs) — patch and remediation guide

  • November 16, 2025
  • Linux
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🟡 Medium   ⏱ 10–30 min  Last verified: 16 November 2025 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-8128-1 Related CVEs: CVE-2018-25099 CVE-2025-40914 CVE-2025-40912 Upstream summary: It was discovered that CryptX did not verify authentication tags while performing GCM and ChaCha20-Poly1305 decryption. An attacker could possibly use this […]

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AlmaLinux 8 — pybind11 — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on AlmaLinux 8

AlmaLinux 8 — pybind11 — multiple vulnerabilities (20 CVEs) — patch and remediation guide

  • November 16, 2025
  • 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-2025:23530 Related CVEs: CVE-2024-11168 CVE-2024-5642 CVE-2024-9287 CVE-2025-0938 CVE-2025-4138 CVE-2025-4330 CVE-2025-4435 CVE-2025-4516  +12 more Upstream summary: Python is an interpreted, interactive, object-oriented programming language, which includes modules, classes, exceptions, very high level dynamic […]

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Common Problems 114117

RHEL 10 – Postfix starts but mail remains deferred due to SELinux policy denial – Fix & Prevention

  • November 16, 2025
  • Linux
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🟠 High   ⏱ 5–30 min  Last verified: 16 November 2025 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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Ubuntu 22.04 — node-sha.js — vulnerability — patch and remediation guide — diagnosis and fix on Ubuntu 22.04

Ubuntu 22.04 — node-sha.js — vulnerability — patch and remediation guide

  • November 16, 2025
  • Linux
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🟢 Low   ⏱ 5–15 min  Last verified: 16 November 2025 Affected versions: Ubuntu 22.04 (jammy) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-7778-1 Related CVEs: CVE-2025-9288 Upstream summary: Nikita Skovoroda discovered that sha.js did not properly handle certain inputs. An attacker could possibly use this issue to manipulate the internal state of […]

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Ubuntu 22.04 — simgear — vulnerability — patch and remediation guide — diagnosis and fix on Ubuntu 22.04

Ubuntu 22.04 — simgear — vulnerability — patch and remediation guide

  • November 16, 2025
  • Linux
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🟢 Low   ⏱ 5–15 min  Last verified: 16 November 2025 Affected versions: Ubuntu 22.04 (jammy) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-7965-1 Related CVEs: CVE-2025-0781 Upstream summary: It was discovered that SimGear could be made to bypass the sandboxing of Nasal scripts. An attacker could possibly use this issue to execute […]

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Ubuntu 22.04 — erlang — multiple vulnerabilities (10 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 22.04

Ubuntu 22.04 — erlang — multiple vulnerabilities (10 CVEs) — patch and remediation guide

  • November 16, 2025
  • Linux
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🟠 High   ⏱ 15–60 min  Last verified: 16 November 2025 Affected versions: Ubuntu 22.04 (jammy) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-7831-1 Related CVEs: CVE-2025-48041 CVE-2025-48038 CVE-2025-48040 CVE-2025-48039 CVE-2025-46712 CVE-2025-4748 CVE-2025-32433 CVE-2025-30211  +2 more Upstream summary: It was discovered that Erlang incorrectly handled resource allocation and consumption in the SFTP SSH […]

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Red Hat Enterprise Linux 8 — gnupg2 — vulnerability — patch and remediation guide — diagnosis and fix on Red Hat Enterprise Linux 8

Red Hat Enterprise Linux 8 — gnupg2 — vulnerability — patch and remediation guide

  • November 16, 2025
  • Linux
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🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Red Hat Enterprise Linux 8 📖 ~4 min read  •  Source: Red Hat advisory RHSA RHSA-2026:1468 Related CVEs: CVE-2025-68973 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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