Security Hardening

Ubuntu 22.04 — ruby-webrick — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 22.04

Ubuntu 22.04 — ruby-webrick — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 26 June 2025 Affected versions: Ubuntu 22.04 (jammy) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-7709-1 Related CVEs: CVE-2025-6442 CVE-2024-47220 Upstream summary: It was discovered that WEBrick incorrectly parsed HTTP headers. In configurations where WEBrick is placed behind an HTTP proxy, a remote attacker could […]

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Windows Server 2022 — KB5043080 — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Windows Server 2022

Windows Server 2022 — KB5043080 — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🔴 Critical   ⏱ 15–90 min  Last verified: 25 May 2026 Affected versions: Windows Server 2022 📖 ~4 min read  •  Source: Microsoft KB5043080 • MSRC update-guide entry Related CVEs: CVE-2024-38119 CVE-2024-38240 CVE-2024-38241 CVE-2024-38242 CVE-2024-38249 CVE-2024-38252 CVE-2024-38253 CVE-2024-38254  +12 more Affected components: Windows Server 2022 Windows Server 2022, 23H2 Edition (Server Core installation) Table of […]

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

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

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Alpine Linux 3.20 / fixed in 3.0.2-r0 📖 ~4 min read  •  Source: Alpine secdb entry — postfixadmin 3.0.2-r0 Related CVEs: CVE-2017-5930 Upstream summary: Alpine community repository for vv3.20 ships postfixadmin 3.0.2-r0 which addresses CVE-2017-5930. Table of contents Symptom & Impact Environment […]

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Ubuntu 22.04 — linux-oracle-6.5 — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 22.04

Ubuntu 22.04 — linux-oracle-6.5 — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 26 June 2025 Affected versions: Ubuntu 22.04 (jammy) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-6895-3 Related CVEs: CVE-2023-52631 CVE-2023-52637 CVE-2023-52638 CVE-2023-52642 CVE-2023-52643 CVE-2023-52645 CVE-2023-52880 CVE-2023-6270  +12 more Upstream summary: It was discovered that the ATA over Ethernet (AoE) driver in the Linux kernel contained […]

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

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

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Alpine Linux 3.20 / fixed in 1.7.0-r1 📖 ~4 min read  •  Source: Alpine secdb entry — hunspell 1.7.0-r1 Related CVEs: CVE-2019-16707 Upstream summary: Alpine main repository for vv3.20 ships hunspell 1.7.0-r1 which addresses CVE-2019-16707. Table of contents Symptom & Impact Environment […]

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openSUSE Tumbleweed — libQt5Gui5 — multiple vulnerabilities (17 CVEs) — patch and remediation guide — diagnosis and fix on openSUSE Tumbleweed

openSUSE Tumbleweed — libQt5Gui5 — multiple vulnerabilities (17 CVEs) — patch and remediation guide

🔴 Critical   ⏱ 15–90 min  Last verified: 25 May 2026 Affected versions: openSUSE Tumbleweed 📖 ~4 min read  •  Source: SUSE security advisory (see also SUSE bugzilla) Related CVEs: CVE-2020-12267 CVE-2024-39936 CVE-2023-32763 CVE-2023-24607 CVE-2022-25255 CVE-2020-13962 CVE-2020-0570 CVE-2020-17507  +9 more Upstream summary: setMarkdown in Qt before 5.14.2 has a use-after-free related to QTextMarkdownImporter::insertBlock. Table of […]

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Oracle Linux 8 — python3.11 — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — python3.11 — vulnerability — patch and remediation guide (ELSA-2024-8838)

🟡 Medium   ⏱ 10–30 min  Last verified: 26 June 2025 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2024-8838 Related CVEs: CVE-2024-6232 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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Windows Server 2019 — KB5052016 — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Windows Server 2019

Windows Server 2019 — KB5052016 — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🔴 Critical   ⏱ 15–90 min  Last verified: 25 May 2026 Affected versions: Windows Server 2019 📖 ~4 min read  •  Source: Microsoft KB5052016 • MSRC update-guide entry Related CVEs: CVE-2025-21376 CVE-2025-21352 CVE-2025-21368 CVE-2025-21369 CVE-2025-21375 CVE-2025-21418 CVE-2025-21419 CVE-2025-21208  +12 more Affected components: Windows Server 2019 (Server Core installation) Table of contents Symptom & Impact Environment […]

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CentOS Stream 9 — gnome-remote-desktop — vulnerability — patch and remediation guide — diagnosis and fix on CentOS Stream 9

CentOS Stream 9 — gnome-remote-desktop — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 26 June 2025 Affected versions: CentOS Stream 9 📖 ~4 min read  •  Source: AlmaLinux/RHEL advisory ALSA-2025:10631 Related CVEs: CVE-2025-5024 Upstream summary: GNOME Remote Desktop is a remote desktop and screen sharing service for the GNOME desktop environment. Security Fix(es): * gnome-remote-desktop: Uncontrolled Resource Consumption due to […]

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openSUSE Tumbleweed — helmfile — vulnerability — patch and remediation guide — diagnosis and fix on openSUSE Tumbleweed

openSUSE Tumbleweed — helmfile — vulnerability — patch and remediation guide

🔴 Critical   ⏱ 15–90 min  Last verified: 25 May 2026 Affected versions: openSUSE Tumbleweed 📖 ~4 min read  •  Source: SUSE advisory SUSE-SU-2025:0297-1 (see also SUSE bugzilla) Related CVEs: CVE-2025-0377 Upstream summary: HashiCorp's go-slug library is vulnerable to a zip-slip style attack when a non-existing user-provided path is extracted from the tar entry. Table […]

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