DNS

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

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

🟠 High   ⏱ 15–60 min  Last verified: 12 March 2026 Affected versions: Ubuntu 22.04 (jammy) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-8268-1 Related CVEs: CVE-2026-4890 CVE-2026-4891 CVE-2026-2291 CVE-2026-4892 CVE-2026-5172 CVE-2026-4893 CVE-2023-28450 CVE-2023-50387  +2 more Upstream summary: Andrew S. Fasano, Royce M, and Hugo Martinez Ray discovered that Dnsmasq did not allocate […]

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AlmaLinux 8 — bind — multiple vulnerabilities (17 CVEs) — patch and remediation guide — diagnosis and fix on AlmaLinux 8

AlmaLinux 8 — bind — multiple vulnerabilities (17 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: AlmaLinux 8 📖 ~4 min read  •  Source: AlmaLinux ALSA ALSA-2026:8352 Related CVEs: CVE-2026-1519 CVE-2025-40778 CVE-2024-11187 CVE-2024-1737 CVE-2024-1975 CVE-2023-4408 CVE-2023-50387 CVE-2023-50868  +9 more Upstream summary: The Berkeley Internet Name Domain (BIND) is an implementation of the Domain Name System (DNS) protocols. BIND […]

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Common Problems 114012

journalctl storage grows uncontrollably

🟡 Medium   ⏱ 5–30 min  Last verified: 11 March 2026 Affected versions: RHEL 10.0 RHEL 10.1 📖 ~1 min read Table of contents Problem Summary Symptoms Diagnostics Root Cause Primary Fix Verification Prevention Rollback Automation Command Reference Escalation Related Notes Problem Summary Systemd journal consumes excessive disk space under /var/log/journal. Symptoms Filesystem usage spikes […]

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How to Install Podman on Oracle Linux 10 — step-by-step Oracle Linux 10 tutorial on Progressive Robot

How to Install Podman on Oracle Linux 10

Introduction How to Install Podman on Oracle Linux 10 on Oracle Linux 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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FreeBSD 15 — dnsdist — multiple vulnerabilities (11 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 15

FreeBSD 15 — dnsdist — multiple vulnerabilities (11 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 11 March 2026 Affected versions: FreeBSD 15 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: DNSdist — vulnerabilities Related CVEs: CVE-2016-7069 CVE-2017-7557 CVE-2024-25581 CVE-2025-30187 CVE-2026-0396 CVE-2026-0397 CVE-2026-24028 CVE-2026-24029  +3 more Upstream summary: https://www.dnsdist.org/security-advisories/powerdns-advisory-for-dnsdist-2026-02.html reports: CVE-2026-0396: HTML injection in the web dashboard CVE-2026-0397: Information disclosure via […]

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Debian 12 — dnsdist — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Debian 12

Debian 12 — dnsdist — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 10 March 2026 Affected versions: Debian 12 (bookworm) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2016-7069 CVE-2017-7557 CVE-2018-14663 CVE-2023-44487 CVE-2025-30193 CVE-2026-0396 CVE-2026-0397 CVE-2026-24028  +12 more Upstream summary: An issue has been found in dnsdist before 1.2.0 in the way EDNS0 OPT records are […]

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Common Problems 114498

journalctl Storage Growth Fills Root Filesystem

🟡 Medium   ⏱ 5–30 min  Last verified: 10 March 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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How to Configure Dovecot IMAP Server on RHEL 10 — step-by-step RHEL 10 tutorial on Progressive Robot

How to Configure Dovecot IMAP Server on RHEL 10

Introduction How to Configure Dovecot IMAP Server on RHEL 10 on RHEL 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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Debian 13 — dns2tcp — vulnerability — patch and remediation guide — diagnosis and fix on Debian 13

Debian 13 — dns2tcp — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 8 March 2026 Affected versions: Debian 13 (trixie) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2008-3910 Upstream summary: dns2tcp before 0.4.1 does not properly handle negative values in a certain length field in the input argument to the (1) dns_simple_decode or (2) dns_decode […]

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Common Problems 113914

RHEL 10 – GPG Signature Verification Fails for Repositories – Trusted Key Repair

🟠 High   ⏱ 5–30 min  Last verified: 8 March 2026 Affected versions: RHEL 10.0 RHEL 10.1 📖 ~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 & Hardening Related […]

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