Ubuntu 24.04 — unbound — multiple vulnerabilities (18 CVEs) — patch and remediation guide

June 24, 2026
Linux
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🟠 High ⏱ 15–60 min Last verified: 24 June 2026 Affected versions: Ubuntu 24.04 (noble) 📖 ~4 min read • Source: Ubuntu Security Notice USN-8282-1 Related CVEs: CVE-2026-40622 CVE-2026-33278 CVE-2026-42923 CVE-2026-44390 CVE-2026-42944 CVE-2026-41292 CVE-2026-42959 CVE-2026-42960 +10 more Upstream summary: Andrew Griffiths discovered that Unbound did not properly handle certain DNSCrypt packets. A remote attacker […]

Ubuntu 26.04 LTS – Secure Boot blocks third-party kernel module – Fix & Prevention

June 23, 2026
Linux
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🟠 High ⏱ 5–30 min Last verified: 23 June 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 […]

Ubuntu 22.04 — rustc-1.80 — vulnerability — patch and remediation guide

June 23, 2026
Linux
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🟢 Low ⏱ 5–15 min Last verified: 23 June 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 […]

Ubuntu 18.04 — cups — multiple vulnerabilities (20 CVEs) — patch and remediation guide

June 23, 2026
Linux
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🟠 High ⏱ 15–60 min Last verified: 23 June 2026 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read • Source: Ubuntu Security Notice USN-7912-2 Related CVEs: CVE-2025-58436 https://launchpad.net/bugs/2133207 CVE-2025-61915 CVE-2025-58060 CVE-2025-58364 CVE-2024-47175 https://launchpad.net/bugs/2070315 CVE-2024-35235 +12 more Upstream summary: USN-7912-1 fixed vulnerabilities in CUPS. This update provides the corresponding update for Ubuntu 16.04 LTS, […]

Ubuntu 26.04 LTS – Docker daemon fails after cgroup configuration mismatch – Fix & Prevention

June 23, 2026
Linux
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🟠 High ⏱ 5–30 min Last verified: 23 June 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 […]

Ubuntu 26.04 LTS – fail2ban not banning repeated SSH brute-force attempts – Fix & Prevention

June 23, 2026
Linux
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🟠 High ⏱ 5–30 min Last verified: 23 June 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 […]

How to Configure Unattended Upgrades on Ubuntu 26.04 — step-by-step Linux tutorial on Progressive Robot

How to Sync Time with systemd-timesyncd on Ubuntu 26.04

June 22, 2026
Linux
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Accurate system time is critical for SSL certificates, logs, cron jobs, and distributed systems. Ubuntu 26.04 LTS uses systemd-timesyncd as the default NTP client. This guide shows you how to configure it, verify time synchronisation, and optionally switch to a different NTP server pool. Tested and valid on: Ubuntu 26.04 LTS Prerequisites Ubuntu 26.04 LTS […]

How to Set Up Software RAID with mdadm on Ubuntu 26.04

June 22, 2026
Linux
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Software RAID with mdadm provides data redundancy and performance improvements using standard hardware without a dedicated RAID controller. RAID 1 (mirroring) protects against single disk failure, while RAID 5 and 6 provide space efficiency with fault tolerance. This guide creates a RAID 1 array on Ubuntu 26.04 LTS. Tested and valid on: Ubuntu 26.04 LTS […]

Ubuntu 22.04 — php8.1 — multiple vulnerabilities (20 CVEs) — patch and remediation guide

June 22, 2026
Linux
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🟠 High ⏱ 15–60 min Last verified: 22 June 2026 Affected versions: Ubuntu 22.04 (jammy) 📖 ~4 min read • Source: Ubuntu Security Notice USN-7953-1 Related CVEs: CVE-2025-14178 CVE-2025-14180 CVE-2025-14177 CVE-2025-1220 CVE-2025-1735 CVE-2025-6491 CVE-2024-11235 CVE-2025-1217 +12 more Upstream summary: It was discovered that PHP incorrectly handled memory while reading images in multi-chunk mode. An […]

Ubuntu 24.04 — rsync — multiple vulnerabilities (15 CVEs) — patch and remediation guide

June 22, 2026
Linux
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🟠 High ⏱ 15–60 min Last verified: 22 June 2026 Affected versions: Ubuntu 24.04 (noble) 📖 ~4 min read • Source: Ubuntu Security Notice USN-8283-1 Related CVEs: CVE-2026-43619 CVE-2026-43617 CVE-2026-43620 CVE-2025-10158 CVE-2026-29518 CVE-2026-43618 CVE-2026-41035 CVE-2026-45232 +7 more Upstream summary: Calum Hutton discovered that rsync contained a heap-based out-of-bounds read when handling file transfers. A […]

ubuntu

Ubuntu 24.04 — unbound — multiple vulnerabilities (18 CVEs) — patch and remediation guide

Ubuntu 26.04 LTS – Secure Boot blocks third-party kernel module – Fix & Prevention

Ubuntu 22.04 — rustc-1.80 — vulnerability — patch and remediation guide

Ubuntu 18.04 — cups — multiple vulnerabilities (20 CVEs) — patch and remediation guide

Ubuntu 26.04 LTS – Docker daemon fails after cgroup configuration mismatch – Fix & Prevention

Ubuntu 26.04 LTS – fail2ban not banning repeated SSH brute-force attempts – Fix & Prevention

How to Sync Time with systemd-timesyncd on Ubuntu 26.04

How to Set Up Software RAID with mdadm on Ubuntu 26.04

Ubuntu 22.04 — php8.1 — multiple vulnerabilities (20 CVEs) — patch and remediation guide

Ubuntu 24.04 — rsync — multiple vulnerabilities (15 CVEs) — patch and remediation guide

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