🟡 Medium ⏱ 10–30 min Last verified: 15 July 2026 Affected versions: Ubuntu 22.04 (jammy) 📖 ~4 min read • Source: Ubuntu Security Notice USN-8119-1 Related CVEs: CVE-2026-29111 CVE-2025-4598 CVE-2022-3821 CVE-2022-4415 CVE-2022-45873 Upstream summary: It was discovered that systemd incorrectly handled certain cgroup paths. A local attacker could possibly use this issue to cause […]
🟡 Medium ⏱ 5–30 min Last verified: 14 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 […]
CodeIgniter 4 (CI4) is a lightweight PHP framework with a small footprint, excellent documentation, and a gentle learning curve. It is ideal for developers who want a fast, simple MVC framework without heavy dependencies. This guide deploys CodeIgniter 4 on Ubuntu 26.04 LTS with Nginx and PHP 8.4. Tested and valid on: Ubuntu 26.04 LTS […]
🟡 Medium ⏱ 10–30 min Last verified: 14 July 2026 Affected versions: Ubuntu 22.04 (jammy) 📖 ~4 min read • Source: Ubuntu Security Notice USN-8170-1 Related CVEs: CVE-2026-35091 CVE-2026-35092 CVE-2025-30472 Upstream summary: It was discovered that Corosync incorrectly handled the membership commit token validity check. A remote attacker could use this issue to cause […]
🟠 High ⏱ 15–60 min Last verified: 14 July 2026 Affected versions: Ubuntu 24.04 (noble) 📖 ~4 min read • Source: Ubuntu Security Notice USN-8018-2 Related CVEs: CVE-2025-15367 CVE-2025-15366 CVE-2026-0865 https://bugs.launchpad.net/bugs/2143706 CVE-2025-15282 CVE-2026-0672 CVE-2025-13837 CVE-2025-11468 +12 more Upstream summary: USN-8018-1 fixed vulnerabilities in python3. That update introduced regressions. The patches for CVE-2025-15366 and CVE-2025-15367 […]
iptables is the traditional Linux packet filtering framework. While UFW provides a simplified interface, understanding iptables directly is valuable for advanced firewall rules, NAT, port forwarding, and Docker networking. This guide configures iptables on Ubuntu 26.04 LTS. Tested and valid on: Ubuntu 26.04 LTS Prerequisites Ubuntu 26.04 LTS A user with sudo privileges Basic networking […]
Prometheus is an open-source metrics collection and alerting system, while Grafana provides beautiful dashboards for visualising those metrics. Together they form the most popular open-source monitoring stack. This guide installs both on Ubuntu 26.04 LTS with Nginx and SSL. Tested and valid on: Ubuntu 26.04 LTS Prerequisites Ubuntu 26.04 LTS with Nginx installed A user […]
k3s is a certified lightweight Kubernetes distribution by Rancher. With a single binary under 100 MB, k3s is perfect for edge computing, IoT, CI environments, and resource-constrained servers. It bundles containerd, Flannel networking, and SQLite (or etcd) in one package. This guide installs k3s on Ubuntu 26.04 LTS. Tested and valid on: Ubuntu 26.04 LTS […]
🟠 High ⏱ 15–60 min Last verified: 13 July 2026 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read • Source: Ubuntu Security Notice USN-8093-1 Related CVEs: CVE-2026-3731 CVE-2026-0965 CVE-2026-0964 CVE-2026-0967 CVE-2026-0966 CVE-2026-0968 CVE-2025-8277 CVE-2025-8114 +10 more Upstream summary: It was discovered that libssh incorrectly performed bounds checking when processing SFTP extensions. If a […]
🟡 Medium ⏱ 10–30 min Last verified: 13 July 2026 Affected versions: Ubuntu 24.04 (noble) 📖 ~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 Upstream summary: Andrew S. Fasano, Royce M, and Hugo Martinez Ray discovered that Dnsmasq did not allocate the necessary space to […]
