ubuntu

Ubuntu 18.04 — protobuf — multiple vulnerabilities (5 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 18.04

Ubuntu 18.04 — protobuf — multiple vulnerabilities (5 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 15 January 2025 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-7629-2 Related CVEs: CVE-2025-4565 CVE-2024-7254 CVE-2021-22569 CVE-2021-22570 CVE-2022-1941 Upstream summary: USN-7435-1 and USN-7629-1 fixed vulnerabilities in Protocol Buffers for several releases of Ubuntu. This update provides the corresponding fixes for […]

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Ubuntu 20.04 — clamav — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 20.04

Ubuntu 20.04 — clamav — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 15 January 2025 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-7615-2 Related CVEs: CVE-2025-20234 CVE-2025-20260 CVE-2024-20505 CVE-2024-20506 https://launchpad.net/bugs/2046581 CVE-2023-20197 CVE-2023-20032 CVE-2023-20052  +12 more Upstream summary: USN-7615-1 fixed several vulnerabilities in ClamAV. This update provides the corresponding update for Ubuntu 20.04 […]

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Ubuntu 18.04 — poppler — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 18.04

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

🟠 High   ⏱ 15–60 min  Last verified: 15 January 2025 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-7708-1 Related CVEs: CVE-2025-50420 CVE-2025-52886 CVE-2022-27337 CVE-2025-43903 CVE-2025-32364 CVE-2025-32365 CVE-2024-56378 https://launchpad.net/bugs/2045027  +12 more Upstream summary: It was discovered that poppler incorrectly handled certain PDF files. An attacker could possibly use […]

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Common Problems 116457

Ubuntu 24.04 LTS – apt update returns 404 from stale mirrors – Fix & Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 14 January 2025 Affected versions: Ubuntu 24.04 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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Common Problems 116434

Ubuntu 24.04 LTS – netplan apply breaks network connectivity – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 14 January 2025 Affected versions: Ubuntu 24.04 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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Ubuntu 20.04 — org-mode — multiple vulnerabilities (4 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 20.04

Ubuntu 20.04 — org-mode — multiple vulnerabilities (4 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 14 January 2025 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-7375-1 Related CVEs: CVE-2023-28617 CVE-2024-30202 CVE-2024-30205 CVE-2024-39331 Upstream summary: It was discovered that Org Mode did not correctly handle filenames containing shell metacharacters. An attacker could possibly use this issue […]

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How to Set Up Software RAID with mdadm on Ubuntu 24.04 — step-by-step Linux tutorial on Progressive Robot

How to Set Up Software RAID with mdadm on Ubuntu 24.04

mdadm is the standard Linux tool for creating and managing software RAID arrays. RAID provides redundancy and/or performance improvements across multiple disks. This guide creates a RAID 1 (mirror) array on Ubuntu 24.04 LTS. Tested and valid on: Ubuntu 24.04 LTS Prerequisites Ubuntu 24.04 LTS server Two or more additional block devices (e.g. /dev/sdb, /dev/sdc) […]

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Common Problems 116607

Ubuntu 24.04 LTS – unattended-upgrades fails repeatedly – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 13 January 2025 Affected versions: Ubuntu 24.04 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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Ubuntu 22.04 — cloud-init — multiple vulnerabilities (5 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 22.04

Ubuntu 22.04 — cloud-init — multiple vulnerabilities (5 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 13 January 2025 Affected versions: Ubuntu 22.04 (jammy) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-7677-1 Related CVEs: CVE-2024-6174 CVE-2024-11584 CVE-2023-1786 https://bugs.launchpad.net/cloud-init/+bug/2013967 CVE-2022-2084 Upstream summary: Harry Sintonen discovered that the hotplugd socket in cloud-init was world writable. An attacker could possibly use this issue to […]

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Ubuntu 24.04 — libyang2 — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 24.04

Ubuntu 24.04 — libyang2 — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 13 January 2025 Affected versions: Ubuntu 24.04 (noble) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-7752-1 Related CVEs: CVE-2023-26917 CVE-2023-26916 Upstream summary: It was discovered that libyang incorrectly handled certain memory operations when parsing YANG strings. An attacker could possibly use this issue to cause […]

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