Security Hardening

Fedora 42 — nginx-mod-vts — multiple vulnerabilities (6 CVEs) — patch and remediation guide — diagnosis and fix on Fedora 42

Fedora 42 — nginx-mod-vts — multiple vulnerabilities (6 CVEs) — patch and remediation guide

  • July 3, 2026
  • Linux
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🔴 Critical   ⏱ 15–90 min  Last verified: 25 May 2026 Affected versions: Fedora 42 📖 ~4 min read  •  Source: Fedora update FEDORA-2026-38623b4fed Related CVEs: CVE-2026-42926 CVE-2026-42945 CVE-2026-42946 CVE-2026-42934 CVE-2026-40460 CVE-2026-40701 Upstream summary: nginx-mod-vts: – Rebuild for 1.30.1 nginx-mod-fancyindex: – Rebuild for 1.30.1 nginx-mod-naxsi: – Rebuild for 1.30.1 nginx-mod-headers-more: – Rebuild for 1.30.1 nginx-mod-brotli: […]

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Common Problems 116014

Ubuntu 26.04 LTS – clock drift causes TLS and authentication failures – Fix & Prevention

  • July 3, 2026
  • Linux
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🟠 High   ⏱ 5–30 min  Last verified: 3 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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SLES 16 — openssh — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on SLES 16

SLES 16 — openssh — multiple vulnerabilities (20 CVEs) — patch and remediation guide

  • July 3, 2026
  • Linux
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🔴 Critical   ⏱ 15–90 min  Last verified: 3 July 2026 Affected versions: SLES 16 📖 ~4 min read  •  Source: SUSE advisory SUSE-SU-2016:0117-1 (see also SUSE bugzilla) Related CVEs: CVE-2016-0777 CVE-2022-2274 CVE-2008-1483 CVE-2016-10010 CVE-2021-28041 CVE-2021-41617 CVE-2023-38408 CVE-2024-6387  +12 more Upstream summary: The resend_bytes function in roaming_common.c in the client in OpenSSH 5.x, 6.x, and […]

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How to Install Netdata Monitoring on FreeBSD 15 — step-by-step FreeBSD 15 tutorial on Progressive Robot

How to Install Netdata Monitoring on FreeBSD 15

Introduction Deploying install netdata monitoring on a FreeBSD 15 machine differs from Linux in several important ways: packages come from the FreeBSD Ports Collection or the binary pkg repository, services are registered in /etc/rc.conf via sysrc(8), and firewall rules are written in pf.conf(5) syntax. This tutorial stays entirely within the standard base + ports approach […]

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Oracle Linux 10 — .NET 9.0 — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 10

Oracle Linux 10 — .NET 9.0 — vulnerability — patch and remediation guide (ELSA-2026-4450)

  • July 3, 2026
  • Linux
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🟠 High   ⏱ 15–60 min  Last verified: 3 July 2026 Affected versions: Oracle Linux 10 📖 ~4 min read  •  Source: ELSA advisory ELSA-2026-4450 Related CVEs: CVE-2026-26127 CVE-2026-26130 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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Ubuntu 20.04 — avahi — multiple vulnerabilities (13 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 20.04

Ubuntu 20.04 — avahi — multiple vulnerabilities (13 CVEs) — patch and remediation guide

  • July 3, 2026
  • Linux
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🟠 High   ⏱ 15–60 min  Last verified: 3 July 2026 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-8269-1 Related CVEs: CVE-2026-24401 CVE-2026-34933 CVE-2025-68276 CVE-2025-68468 CVE-2025-68471 CVE-2023-38469 CVE-2023-38470 CVE-2023-38471  +5 more Upstream summary: It is discovered that Avahi incorrectly handled crafted input. A remote attacker could possibly use […]

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

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

  • July 3, 2026
  • Linux
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🔴 Critical   ⏱ 15–90 min  Last verified: 25 May 2026 Affected versions: AlmaLinux 8 📖 ~4 min read  •  Source: AlmaLinux ALSA ALSA-2023:7213 Related CVEs: CVE-2023-46846 CVE-2023-46847 CVE-2026-32748 CVE-2026-33526 CVE-2025-62168 CVE-2024-23638 CVE-2024-45802 CVE-2023-50269  +12 more Upstream summary: Squid is a high-performance proxy caching server for web clients, supporting FTP, Gopher, and HTTP data objects. […]

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Common Problems 115969

Ubuntu 26.04 LTS – nftables backend conflicts with legacy iptables scripts

  • July 2, 2026
  • Linux
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🟡 Medium   ⏱ 5–30 min  Last verified: 2 July 2026 Affected versions: Ubuntu 26.04 LTS Ubuntu 26.04 Ubuntu 26.04.1 📖 ~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 […]

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AlmaLinux 10 — kea — multiple vulnerabilities (5 CVEs) — patch and remediation guide — diagnosis and fix on AlmaLinux 10

AlmaLinux 10 — kea — multiple vulnerabilities (5 CVEs) — patch and remediation guide

  • July 2, 2026
  • Linux
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🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: AlmaLinux 10 📖 ~4 min read  •  Source: AlmaLinux ALSA ALSA-2026:7342 Related CVEs: CVE-2026-3608 CVE-2025-11232 CVE-2025-32801 CVE-2025-32802 CVE-2025-32803 Upstream summary: DHCP implementation from Internet Systems Consortium, Inc. that features fully functional DHCPv4, DHCPv6 and Dynamic DNS servers. Both DHCP servers fully support […]

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Common Problems 115903

Fix Broken Dependencies After Upgrading to Ubuntu 26.04 LTS

🟠 High   ⏱ 5–30 min  Last verified: 2 July 2026 Affected versions: 26.04 📖 ~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 […]

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