Linux

SLES 12 — wpa_supplicant — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on SLES 12

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

🟠 High   ⏱ 15–60 min  Last verified: 30 April 2023 Affected versions: SLES 12 📖 ~4 min read  •  Source: SUSE advisory SUSE-SU-2022:0716-1 (see also SUSE bugzilla) Related CVEs: CVE-2022-23304 CVE-2019-9494 CVE-2019-9498 CVE-2021-0326 CVE-2021-27803 CVE-2022-23303 CVE-2019-9499 CVE-2023-52160  +12 more Upstream summary: The implementations of EAP-pwd in hostapd before 2.10 and wpa_supplicant before 2.10 are […]

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How to Harden SSH on RHEL 9 — step-by-step RHEL 9 tutorial on Progressive Robot

How to Harden SSH on RHEL 9

SSH is the primary remote access method for Linux servers, making it a common target for brute-force attacks, credential stuffing, and exploitation attempts. On RHEL 9, the default OpenSSH configuration works out of the box but leaves several attack vectors open. Hardening your SSH server configuration significantly reduces the risk of unauthorized access and is […]

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Oracle Linux 8 — 389-ds:1.4 — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — 389-ds:1.4 — vulnerability — patch and remediation guide (ELSA-2022-5823)

🟡 Medium   ⏱ 10–30 min  Last verified: 30 April 2023 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2022-5823 Related CVEs: CVE-2022-0918 CVE-2022-0996 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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Oracle Linux 9 — perl — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 9

Oracle Linux 9 — perl — vulnerability — patch and remediation guide (ELSA-2024-2228)

🟡 Medium   ⏱ 10–30 min  Last verified: 30 April 2023 Affected versions: Oracle Linux 9 📖 ~4 min read  •  Source: ELSA advisory ELSA-2024-2228 Related CVEs: CVE-2023-47038 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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Oracle Linux 9 — sqlite — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 9

Oracle Linux 9 — sqlite — vulnerability — patch and remediation guide (ELSA-2023-0339)

🟡 Medium   ⏱ 10–30 min  Last verified: 30 April 2023 Affected versions: Oracle Linux 9 📖 ~4 min read  •  Source: ELSA advisory ELSA-2023-0339 Related CVEs: CVE-2022-35737 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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Common Problems 124657

Oracle Linux 9 – Common Problem 020 – Diagnosis and Fix

🟠 High   ⏱ 5–30 min  Last verified: 30 April 2023 Affected versions: Oracle Linux 9 📖 ~3 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 — flatpak security, bug fix, and — enhancement update — new behaviour and fixes — diagnosis and fix on Oracle Linux 9

Oracle Linux 9 — flatpak security, bug fix, and — enhancement update — new behaviour and fixes (ELSA-2023-6518)

🟡 Medium   ⏱ 10–30 min  Last verified: 29 April 2023 Affected versions: Oracle Linux 9 📖 ~4 min read  •  Source: ELSA advisory ELSA-2023-6518 Related CVEs: CVE-2023-28100 CVE-2023-28101 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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Common Problems 121581

Debian 9 – LVM Thin Pool Metadata Full – Service Outage Prevention

🔴 Critical   ⏱ 5–30 min  Last verified: 29 April 2023 Affected versions: Debian 9 📖 ~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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Alpine Linux edge — sysstat — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Alpine Linux edge

Alpine Linux edge — sysstat — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Alpine Linux edge / fixed in 12.7.6-r0 📖 ~4 min read  •  Source: Alpine secdb entry — sysstat 12.7.6-r0 Related CVEs: CVE-2023-33204 CVE-2022-39377 Upstream summary: Alpine community repository for vedge ships sysstat 12.7.6-r0 which addresses CVE-2023-33204. Table of contents Symptom & Impact […]

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Amazon Linux 2 — SDL2 — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on Amazon Linux 2

Amazon Linux 2 — SDL2 — multiple vulnerabilities (3 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Amazon Linux 2 📖 ~4 min read  •  Source: Amazon Linux advisory ALAS2-2019-1318 Related CVEs: CVE-2019-12222 CVE-2019-13616 CVE-2022-4743 Upstream summary: An issue was discovered in libSDL2.a in Simple DirectMedia Layer (SDL) 2.0.9. There is an out-of-bounds read in the function SDL_InvalidateMap at […]

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