Security Hardening

Windows Server 2025 — KB5055609 — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Windows Server 2025

Windows Server 2025 — KB5055609 — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🔴 Critical   ⏱ 15–90 min  Last verified: 25 May 2026 Affected versions: Windows Server 2025 📖 ~4 min read  •  Source: Microsoft KB5055609 • MSRC update-guide entry Related CVEs: CVE-2025-26663 CVE-2025-26686 CVE-2025-26670 CVE-2025-26664 CVE-2025-26665 CVE-2025-26669 CVE-2025-26667 CVE-2025-26668  +12 more Affected components: Windows Server 2025 Microsoft summary: Use after free in Windows LDAP – Lightweight […]

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FreeBSD 15 — quake2lnx — security advisory — patch and remediation guide — diagnosis and fix on FreeBSD 15

FreeBSD 15 — quake2lnx — security advisory — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 19 June 2026 Affected versions: FreeBSD 15 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: quake2 — multiple critical vulnerabilities Upstream summary: An advisory published by Richard Stanway describes numerous critical vulnerabilities in the Quake II engine: Due to unchecked input at various stages in […]

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FreeBSD 15 — mnemo — security advisory — patch and remediation guide — diagnosis and fix on FreeBSD 15

FreeBSD 15 — mnemo — security advisory — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 19 June 2026 Affected versions: FreeBSD 15 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: mnemo — Cross site scripting vulnerabilities in several of the notepad name and note data fields Upstream summary: Announce of Mnemo H3 (2.0.3) (final): This [2.0.3] is a security release […]

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FreeBSD 15 — plexhometheater — multiple vulnerabilities (19 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 15

FreeBSD 15 — plexhometheater — multiple vulnerabilities (19 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 19 June 2026 Affected versions: FreeBSD 15 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: ffmpeg — multiple vulnerabilities Related CVEs: CVE-2015-6761 CVE-2015-6818 CVE-2015-6819 CVE-2015-6820 CVE-2015-6821 CVE-2015-6822 CVE-2015-6823 CVE-2015-6824  +11 more Upstream summary: NVD reports: The ff_dwt_decode function in libavcodec/jpeg2000dwt.c in FFmpeg before 2.8.4 does […]

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Common Problems 115926

Initramfs or /boot Space Exhaustion During Kernel Updates

🟡 Medium   ⏱ 5–30 min  Last verified: 19 June 2026 📖 ~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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Windows Server 2025 — KB5087544 — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Windows Server 2025

Windows Server 2025 — KB5087544 — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🔴 Critical   ⏱ 15–90 min  Last verified: 25 May 2026 Affected versions: Windows Server 2025 📖 ~4 min read  •  Source: Microsoft KB5087544 • MSRC update-guide entry Related CVEs: CVE-2026-35421 CVE-2026-32161 CVE-2026-40403 CVE-2026-21530 CVE-2026-33834 CVE-2026-33839 CVE-2026-33841 CVE-2026-34329  +12 more Affected components: Windows Server 2025 Microsoft summary: Heap-based buffer overflow in Windows GDI allows an […]

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FreeBSD 15 — drm-fbsd12.0-kmod — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 15

FreeBSD 15 — drm-fbsd12.0-kmod — multiple vulnerabilities (3 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 19 June 2026 Affected versions: FreeBSD 15 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: drm graphics drivers — potential information disclusure via local access Related CVEs: CVE-2019-0154 CVE-2019-11112 CVE-2019-14615 Upstream summary: Intel reports: .A potential security vulnerability in Intel(R) Processor Graphics may allow information […]

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Amazon Linux 2023 — ngtcp2 — vulnerability — patch and remediation guide — diagnosis and fix on Amazon Linux 2023

Amazon Linux 2023 — ngtcp2 — vulnerability — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Amazon Linux 2023 📖 ~4 min read  •  Source: Amazon Linux advisory ALAS2023-2026-1633 Related CVEs: CVE-2026-40170 Upstream summary: ngtcp2 is a C implementation of the IETF QUIC protocol. In versions prior to 1.22.1, ngtcp2_qlog_parameters_set_transport_params() serializes peer transport parameters into a fixed 1024-byte […]

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Common Problems 113978

RHEL 10 Podman Container Fails with Cgroup Permission Errors

🟠 High   ⏱ 5–30 min  Last verified: 19 June 2026 Affected versions: RHEL 10 📖 ~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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