Redis is an in-memory data structure store used as a cache, message broker, and database. Redis 8 introduces improved memory efficiency, better persistence options, and enhanced cluster management. This guide installs and secures Redis 8 on Ubuntu 26.04 LTS. Tested and valid on: Ubuntu 26.04 LTS Prerequisites Ubuntu 26.04 LTS server A user with sudo […]
🟠 High ⏱ 15–60 min Last verified: 22 July 2026 Affected versions: Ubuntu 16.04 (xenial) 📖 ~4 min read • Source: Ubuntu Security Notice USN-8102-1 Related CVEs: CVE-2026-3888 CVE-2024-1724 CVE-2024-29068 CVE-2024-29069 CVE-2023-1523 CVE-2022-3328 https://bugs.launchpad.net/ubuntu/+source/snapd/+bug/1961365 https://bugs.launchpad.net/ubuntu/+source/snapd/+bug/1961791 +11 more Upstream summary: Qualys discovered that snapd incorrectly handled certain operations in the snap's private /tmp directory. If […]
🟢 Low ⏱ 5–15 min Last verified: 22 July 2026 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read • Source: Ubuntu Security Notice USN-8168-2 Related CVEs: CVE-2026-33056 Upstream summary: USN-8168-1 fixed a vulnerability in Rust. This update provides the corresponding update to Ubuntu 14.04 LTS, Ubuntu 16.04 LTS, Ubuntu 18.04 LTS and Ubuntu […]
🟢 Low ⏱ 5–15 min Last verified: 22 July 2026 Affected versions: Ubuntu 22.04 (jammy) 📖 ~4 min read • Source: Ubuntu Security Notice USN-8168-1 Related CVEs: CVE-2026-33056 Upstream summary: It was discovered that tar-rs embedded in rustc incorrectly handled symlinks when unpacking a tar archive. If a user or automated system were tricked […]
Postfix is a high-performance, secure, and widely used Mail Transfer Agent (MTA). It handles the SMTP protocol for sending and relaying email. This guide installs and configures Postfix as an internet-facing SMTP server on Ubuntu 26.04 LTS. Tested and valid on: Ubuntu 26.04 LTS Prerequisites Ubuntu 26.04 LTS with a fully qualified domain name (FQDN) […]
🟠 High ⏱ 5–30 min Last verified: 22 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 […]
🟡 Medium ⏱ 5–30 min Last verified: 21 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 […]
🔴 Critical ⏱ 5–30 min Last verified: 21 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 […]
🟡 Medium ⏱ 10–30 min Last verified: 21 July 2026 Affected versions: Ubuntu 24.04 (noble) 📖 ~4 min read • Source: Ubuntu Security Notice USN-8106-1 Related CVEs: CVE-2025-67733 CVE-2026-21863 CVE-2025-49844 CVE-2025-46817 CVE-2025-46818 CVE-2025-46819 CVE-2025-49112 CVE-2024-46981 +1 more Upstream summary: It was discovered that Valkey incorrectly handled errors for lua scripts. An attacker could possibly […]
🟢 Low ⏱ 5–15 min Last verified: 21 July 2026 Affected versions: Ubuntu 24.04 (noble) 📖 ~4 min read • Source: Ubuntu Security Notice USN-7992-1 Related CVEs: CVE-2026-24061 Upstream summary: Kyu Neushwaistein discovered that telnetd in Inetutils incorrectly handled certain environment variables. A remote attacker could use this issue to bypass authentication and open […]
