Linux

Oracle Linux 9 — Unbreakable Enterprise kernel — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 9

Oracle Linux 9 — Unbreakable Enterprise kernel — vulnerability — patch and remediation guide (ELSA-2025-20552)

  • September 3, 2025
  • Linux
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🟠 High   ⏱ 15–60 min  Last verified: 3 September 2025 Affected versions: Oracle Linux 9 📖 ~4 min read  •  Source: ELSA advisory ELSA-2025-20552 Related CVEs: CVE-2024-26726 CVE-2024-57883 CVE-2025-37948 CVE-2025-37958 CVE-2025-37963 CVE-2025-38000 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – […]

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How to Configure PostgreSQL Connection Pooling with PgBouncer on Debian 13 — step-by-step Debian 13 tutorial on Progressive Robot

How to Configure PostgreSQL Connection Pooling with PgBouncer on Debian 13

  • September 3, 2025
  • Linux
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Introduction This guide explains how to Configure PostgreSQL Connection Pooling with PgBouncer 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 […]

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Common Problems 119520

Debian 13 /var/log Full from Excessive journalctl Retention

  • September 3, 2025
  • Linux
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🟡 Medium   ⏱ 5–30 min  Last verified: 3 September 2025 📖 ~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 & Cross-Refs References & Further […]

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Common Problems 113980

RHEL 10 – SELinux AVC denials break custom web application after update – Fix & Prevention

  • September 2, 2025
  • Linux
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🟠 High   ⏱ 5–30 min  Last verified: 2 September 2025 Affected versions: RHEL 10.0 RHEL 10.1 📖 ~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 & Hardening Related […]

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Debian 13 — libfwsi — vulnerability — patch and remediation guide — diagnosis and fix on Debian 13

Debian 13 — libfwsi — vulnerability — patch and remediation guide

  • September 2, 2025
  • Linux
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🟢 Low   ⏱ 5–15 min  Last verified: 2 September 2025 Affected versions: Debian 13 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2019-17263 Upstream summary: In libyal libfwsi before 20191006, libfwsi_extension_block_copy_from_byte_stream in libfwsi_extension_block.c has a heap-based buffer over-read because rejection of an unsupported size only considers values less than 6, even […]

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Debian 13 — revelation — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on Debian 13

Debian 13 — revelation — multiple vulnerabilities (3 CVEs) — patch and remediation guide

  • September 2, 2025
  • Linux
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🟡 Medium   ⏱ 10–30 min  Last verified: 2 September 2025 Affected versions: Debian 13 (trixie) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2012-2742 CVE-2012-2743 CVE-2012-3818 Upstream summary: Revelation 0.4.13-2 and earlier uses only the first 32 characters of a password followed by a sequence of zeros, which reduces the entropy […]

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Common Problems 114445

RHEL 9: NetworkManager Interface Not Coming Up After Reboot

  • September 2, 2025
  • Linux
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🟡 Medium   ⏱ 5–30 min  Last verified: 2 September 2025 📖 ~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 & Cross-Refs References & Further […]

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How to Configure Dovecot IMAP Server on Debian 13 — step-by-step Debian 13 tutorial on Progressive Robot

How to Configure Dovecot IMAP Server on Debian 13

  • September 2, 2025
  • Linux
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Introduction Debian 13 Trixie is built around the ethos of stability and free software. Setting up configure dovecot imap server on Trixie leverages the same proven Debian packaging system that powers millions of servers worldwide, while benefiting from the latest upstream releases included in the Trixie freeze. Follow each step carefully and the resulting configuration […]

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Debian 13 — llvm-toolchain-17 — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Debian 13

Debian 13 — llvm-toolchain-17 — multiple vulnerabilities (2 CVEs) — patch and remediation guide

  • September 2, 2025
  • Linux
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🟢 Low   ⏱ 5–15 min  Last verified: 2 September 2025 Affected versions: Debian 13 (trixie) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2024-31852 CVE-2024-7883 Upstream summary: LLVM before 18.1.3 generates code in which the LR register can be overwritten without data being saved to the stack, and thus there can […]

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Debian 13 — node-form-data — vulnerability — patch and remediation guide — diagnosis and fix on Debian 13

Debian 13 — node-form-data — vulnerability — patch and remediation guide

  • September 2, 2025
  • Linux
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🟢 Low   ⏱ 5–15 min  Last verified: 2 September 2025 Affected versions: Debian 13 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2025-7783 Upstream summary: Use of Insufficiently Random Values vulnerability in form-data allows HTTP Parameter Pollution (HPP). This vulnerability is associated with program files lib/form_data.Js. This issue affects form-data: < […]

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