Linux

Common Problems 116393

Ubuntu 24.04 LTS – apt update fails with NO_PUBKEY for third-party repository – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 2 August 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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Rocky Linux 10 — libssh — vulnerability — patch and remediation guide — diagnosis and fix on Rocky Linux 10

Rocky Linux 10 — libssh — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Rocky Linux 10 📖 ~4 min read  •  Source: Rocky Linux RXSA RLSA-2025:23484 Related CVEs: CVE-2025-5987 Upstream summary: libssh is a library which implements the SSH protocol. It can be used to implement client and server applications. Security Fix(es): * libssh: Invalid […]

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Alpine Linux 3.20 — pango — vulnerability — patch and remediation guide — diagnosis and fix on Alpine Linux 3.20

Alpine Linux 3.20 — pango — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Alpine Linux 3.20 / fixed in 1.44.1-r0 📖 ~4 min read  •  Source: Alpine secdb entry — pango 1.44.1-r0 Related CVEs: CVE-2019-1010238 Upstream summary: Alpine main repository for vv3.20 ships pango 1.44.1-r0 which addresses CVE-2019-1010238. Table of contents Symptom & Impact Environment […]

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Debian 12 — libsoup3 — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Debian 12

Debian 12 — libsoup3 — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 2 August 2025 Affected versions: Debian 12 (bookworm) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2024-52530 CVE-2024-52531 CVE-2024-52532 CVE-2025-11021 CVE-2025-12105 CVE-2025-14523 CVE-2025-2784 CVE-2025-32049  +12 more Upstream summary: GNOME libsoup before 3.6.0 allows HTTP request smuggling in some configurations because '\0' characters at the […]

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Alpine Linux 3.20 — freeradius — multiple vulnerabilities (4 CVEs) — patch and remediation guide — diagnosis and fix on Alpine Linux 3.20

Alpine Linux 3.20 — freeradius — multiple vulnerabilities (4 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Alpine Linux 3.20 / fixed in 3.0.27-r0 📖 ~4 min read  •  Source: Alpine secdb entry — freeradius 3.0.27-r0 Related CVEs: CVE-2024-3596 CVE-2019-10143 CVE-2019-11234 CVE-2019-11235 Upstream summary: Alpine main repository for vv3.20 ships freeradius 3.0.27-r0 which addresses CVE-2024-3596. Table of contents Symptom […]

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How to Configure a Static IP Address with Netplan on Ubuntu 24.04 — step-by-step Linux tutorial on Progressive Robot

How to Configure DKIM, SPF and DMARC on Ubuntu 24.04

DKIM, SPF, and DMARC are email authentication standards that prevent spoofing and improve email deliverability. This guide configures all three on a Postfix server on Ubuntu 24.04 LTS. Tested and valid on: Ubuntu 24.04 LTS Prerequisites Ubuntu 24.04 LTS server Postfix installed and running Access to your domain DNS records A user with sudo privileges […]

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Oracle Linux 8 — glibc — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — glibc — vulnerability — patch and remediation guide (ELSA-2025-28054)

🟡 Medium   ⏱ 10–30 min  Last verified: 2 August 2025 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2025-28054 Related CVEs: CVE-2025-8058 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance […]

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SLES 12 — jakarta-commons-fileupload — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on SLES 12

SLES 12 — jakarta-commons-fileupload — multiple vulnerabilities (3 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 2 August 2025 Affected versions: SLES 12 📖 ~4 min read  •  Source: SUSE advisory RHSA-2025:14177 (see also SUSE bugzilla) Related CVEs: CVE-2025-48976 CVE-2013-2186 CVE-2016-1000031 Upstream summary: Allocation of resources for multipart headers with insufficient limits enabled a DoS vulnerability in Apache Commons FileUpload. This issue affects […]

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