Linux

Common Problems 119612

Debian 13 – Postfix Queue Deferred by DNS Resolution Errors – Mail Flow Repair

🟠 High   ⏱ 5–30 min  Last verified: 16 August 2025 Affected versions: Debian 13 (Trixie) 📖 ~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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Oracle Linux 9 — kernel — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 9

Oracle Linux 9 — kernel — vulnerability — patch and remediation guide (ELSA-2025-4341)

🟠 High   ⏱ 15–60 min  Last verified: 16 August 2025 Affected versions: Oracle Linux 9 📖 ~4 min read  •  Source: ELSA advisory ELSA-2025-4341 Related CVEs: CVE-2025-21927 CVE-2024-44990 CVE-2024-42292 CVE-2024-42322 CVE-2024-46826 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative […]

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Oracle Linux 10 — Unbreakable Enterprise kernel — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 10

Oracle Linux 10 — Unbreakable Enterprise kernel — vulnerability — patch and remediation guide (ELSA-2025-20405)

🟡 Medium   ⏱ 10–30 min  Last verified: 16 August 2025 Affected versions: Oracle Linux 10 📖 ~4 min read  •  Source: ELSA advisory ELSA-2025-20405 Related CVEs: CVE-2024-36357 CVE-2024-36350 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & […]

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Alpine Linux 3.20 — libressl — multiple vulnerabilities (5 CVEs) — patch and remediation guide — diagnosis and fix on Alpine Linux 3.20

Alpine Linux 3.20 — libressl — multiple vulnerabilities (5 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Alpine Linux 3.20 / fixed in 3.4.3-r0 📖 ~4 min read  •  Source: Alpine secdb entry — libressl 3.4.3-r0 Related CVEs: CVE-2022-0778 CVE-2020-1971 CVE-2018-0732 CVE-2018-0495 CVE-2017-8301 Upstream summary: Alpine community repository for vv3.20 ships libressl 3.4.3-r0 which addresses CVE-2022-0778. Table of contents […]

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Oracle Linux 9 — fontforge — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 9

Oracle Linux 9 — fontforge — vulnerability — patch and remediation guide (ELSA-2026-6628)

🟠 High   ⏱ 15–60 min  Last verified: 16 August 2025 Affected versions: Oracle Linux 9 📖 ~4 min read  •  Source: ELSA advisory ELSA-2026-6628 Related CVEs: CVE-2025-15270 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 — ghostscript — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on SLES 12

SLES 12 — ghostscript — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🔴 Critical   ⏱ 15–90 min  Last verified: 16 August 2025 Affected versions: SLES 12 📖 ~4 min read  •  Source: SUSE advisory SUSE-SU-2021:3044-1 (see also SUSE bugzilla) Related CVEs: CVE-2021-3781 CVE-2025-27832 CVE-2025-27835 CVE-2025-27836 CVE-2024-46951 CVE-2024-46953 CVE-2024-46956 CVE-2024-33871  +12 more Upstream summary: A trivial sandbox (enabled with the `-dSAFER` option) escape flaw was found in […]

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How to Configure Virtual Hosts in Apache2 on Debian 13 — step-by-step Debian 13 tutorial on Progressive Robot

How to Configure Virtual Hosts in Apache2 on Debian 13

Introduction This guide explains how to Configure Virtual Hosts in Apache2 on Debian 13 on Debian 13 Trixie. Debian Trixie uses systemd for service management, nftables as the underlying packet filter (with ufw or iptables front-ends still available), and AppArmor for mandatory access control. Every command is designed for a minimal Debian 13 install with […]

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Debian 13 — restrictedpython — multiple vulnerabilities (4 CVEs) — patch and remediation guide — diagnosis and fix on Debian 13

Debian 13 — restrictedpython — multiple vulnerabilities (4 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 15 August 2025 Affected versions: Debian 13 (trixie) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2023-37271 CVE-2023-41039 CVE-2024-47532 CVE-2025-22153 Upstream summary: RestrictedPython is a tool that helps to define a subset of the Python language which allows users to provide a program input […]

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Common Problems 119605

Debian 13 TLS Handshake Failures Due to Missing CA Certificates

🟠 High   ⏱ 5–30 min  Last verified: 15 August 2025 Affected versions: Debian 13 📖 ~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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Debian 13 — python-untangle — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Debian 13

Debian 13 — python-untangle — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 15 August 2025 Affected versions: Debian 13 (trixie) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2022-31471 CVE-2022-33977 Upstream summary: untangle is a python library to convert XML data to python objects. untangle versions 1.2.0 and earlier improperly restricts XML external entity references. By […]

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