Security Hardening

Oracle Linux 9 — Unbreakable Enterprise kernel — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 9

Oracle Linux 9 — Unbreakable Enterprise kernel — vulnerability — patch and remediation guide (ELSA-2026-50144)

  • March 23, 2025
  • Linux
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🟠 High   ⏱ 15–60 min  Last verified: 23 March 2025 Affected versions: Oracle Linux 9 📖 ~4 min read  •  Source: ELSA advisory ELSA-2026-50144 Related CVEs: CVE-2025-22111 CVE-2025-38248 CVE-2025-38591 CVE-2025-68792 CVE-2025-71088 CVE-2025-71127 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – […]

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openSUSE Leap 15.6 — xsd — vulnerability — patch and remediation guide — diagnosis and fix on openSUSE Leap 15.6

openSUSE Leap 15.6 — xsd — vulnerability — patch and remediation guide

  • March 23, 2025
  • Linux
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🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: openSUSE Leap 15.6 📖 ~4 min read  •  Source: SUSE advisory openSUSE-SU-2024:14443-1 (see also SUSE bugzilla) Related CVEs: CVE-2024-50602 Upstream summary: An issue was discovered in libexpat before 2.6.4. There is a crash within the XML_ResumeParser function because XML_StopParser can stop/suspend an […]

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Alpine Linux 3.19 — pjproject — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Alpine Linux 3.19

Alpine Linux 3.19 — pjproject — multiple vulnerabilities (20 CVEs) — patch and remediation guide

  • March 23, 2025
  • Linux
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🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Alpine Linux 3.19 / fixed in 2.14-r0 📖 ~4 min read  •  Source: Alpine secdb entry — pjproject 2.14-r0 Related CVEs: CVE-2023-38703 CVE-2023-27585 CVE-2022-31031 CVE-2022-39244 CVE-2022-39269 CVE-2022-24754 CVE-2022-24763 CVE-2022-24764  +12 more Upstream summary: Alpine main repository for vv3.19 ships pjproject 2.14-r0 which […]

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FreeBSD 14 — waterfox — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 14

FreeBSD 14 — waterfox — multiple vulnerabilities (20 CVEs) — patch and remediation guide

  • March 23, 2025
  • BSD
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🟠 High   ⏱ 15–60 min  Last verified: 23 March 2025 Affected versions: FreeBSD 14 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: mozilla — multiple vulnerabilities Related CVEs: CVE-2017-16541 CVE-2017-7843 CVE-2017-7844 CVE-2018-12358 CVE-2018-12359 CVE-2018-12360 CVE-2018-12361 CVE-2018-12362  +12 more Upstream summary: Mozilla Foundation reports: CVE-2019-11751: Malicious code execution through command line parameters CVE-2019-11746: […]

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openSUSE Leap 15.6 — unbound — multiple vulnerabilities (6 CVEs) — patch and remediation guide — diagnosis and fix on openSUSE Leap 15.6

openSUSE Leap 15.6 — unbound — multiple vulnerabilities (6 CVEs) — patch and remediation guide

  • March 23, 2025
  • Linux
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🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: openSUSE Leap 15.6 📖 ~4 min read  •  Source: SUSE advisory SUSE-SU-2024:1923-1 (see also SUSE bugzilla) Related CVEs: CVE-2022-3204 CVE-2025-11411 CVE-2024-8508 CVE-2022-30698 CVE-2022-30699 CVE-2024-43167 Upstream summary: A vulnerability named 'Non-Responsive Delegation Attack' (NRDelegation Attack) has been discovered in various DNS resolving software. […]

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Common Problems 114591

RHEL 9 Rsyslog Not Forwarding Logs to Central Server

  • March 23, 2025
  • Linux
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🟡 Medium   ⏱ 5–30 min  Last verified: 23 March 2025 📖 ~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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openSUSE Leap 15.5 — libaom3 — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on openSUSE Leap 15.5

openSUSE Leap 15.5 — libaom3 — multiple vulnerabilities (2 CVEs) — patch and remediation guide

  • March 23, 2025
  • Linux
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🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: openSUSE Leap 15.5 📖 ~4 min read  •  Source: SUSE advisory SUSE-SU-2024:2030-1 (see also SUSE bugzilla) Related CVEs: CVE-2024-5171 CVE-2023-6879 Upstream summary: Integer overflow in libaom internal function img_alloc_helper can lead to heap buffer overflow. This function can be reached via 3 […]

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NetBSD 10.0 — ruby192 — vulnerability — patch and remediation guide — diagnosis and fix on NetBSD 10.0

NetBSD 10.0 — ruby192 — vulnerability — patch and remediation guide

  • March 22, 2025
  • BSD
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🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: NetBSD 10.0 📖 ~4 min read  •  Source: pkgsrc audit-packages entry Upstream summary: pkgsrc audit-packages flagged ruby192-* for vulnerability class 'eol'. Reference: https://ftp.NetBSD.org/pub/NetBSD/packages/vulns/eol-packages Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary […]

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How to Configure AlertManager on CentOS Stream 10 — step-by-step CentOS Stream 10 tutorial on Progressive Robot

How to Configure AlertManager on CentOS Stream 10

  • March 22, 2025
  • CentOS
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Introduction How to Configure AlertManager on CentOS Stream 10 on CentOS Stream 10 provides administrators with a robust, enterprise-ready workflow that integrates cleanly with systemd, SELinux, firewalld, and the modern AppStream module system. In this tutorial we will walk through every step required, from package installation to verification, so that the resulting configuration is reproducible […]

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Common Problems 127099

CentOS Stream 10 – Common Problem 239 – Diagnosis and Fix

  • March 22, 2025
  • Linux
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🟢 Low   ⏱ 5–30 min  Last verified: 22 March 2025 Affected versions: CentOS Stream 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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