Security Hardening

Common Problems 116040

Ubuntu 26.04 LTS /boot Partition Full Prevents Kernel Updates

🟠 High   ⏱ 5–30 min  Last verified: 19 July 2026 Affected versions: Ubuntu 26.04 LTS 📖 ~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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Common Problems 116032

Ubuntu 26.04 LTS – unattended-upgrades causes sustained high CPU – Fix & Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 19 July 2026 Affected versions: Ubuntu 26.04 LTS 📖 ~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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Windows Server 2025 — KB5073700 — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Windows Server 2025

Windows Server 2025 — KB5073700 — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Windows Server 2025 📖 ~4 min read  •  Source: Microsoft KB5073700 • MSRC update-guide entry Related CVEs: CVE-2026-0386 CVE-2026-20816 CVE-2026-20820 CVE-2026-20821 CVE-2026-20828 CVE-2026-20831 CVE-2026-20833 CVE-2026-20834  +12 more Affected components: Windows Server 2025 Microsoft summary: Improper access control in Windows Deployment Services allows […]

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FreeBSD 15 — rubygem18-dragonfly — vulnerability — patch and remediation guide — diagnosis and fix on FreeBSD 15

FreeBSD 15 — rubygem18-dragonfly — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 19 July 2026 Affected versions: FreeBSD 15 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: rubygem-dragonfly — arbitrary code execution Related CVEs: CVE-2013-1756 Upstream summary: Mark Evans reports: Unfortnately there is a security vulnerability in Dragonfly when used with Rails which would potentially allow an […]

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FreeBSD 15 — putty — multiple vulnerabilities (13 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 15

FreeBSD 15 — putty — multiple vulnerabilities (13 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 19 July 2026 Affected versions: FreeBSD 15 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: putty — multiple security vulnerabilities Related CVEs: CVE-2005-0467 CVE-2011-4607 CVE-2013-4206 CVE-2013-4207 CVE-2013-4208 CVE-2013-4852 CVE-2015-2157 CVE-2015-5309  +5 more Upstream summary: Simon Tatham reports: These features are new in PuTTY 0.84: Security […]

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FreeBSD 15 — libebml — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 15

FreeBSD 15 — libebml — multiple vulnerabilities (3 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 19 July 2026 Affected versions: FreeBSD 15 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: libebml — multiple vulnerabilities Related CVEs: CVE-2015-8789 CVE-2015-8790 CVE-2015-8791 Upstream summary: Mortiz Bunkus reports: Multiple invalid memory accesses vulnerabilities. Table of contents Symptom & Impact Environment & Reproduction Root Cause […]

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Windows Server 2025 — KB5078738 — security update — patch and remediation guide — diagnosis and fix on Windows Server 2025

Windows Server 2025 — KB5078738 — security update — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Windows Server 2025 📖 ~4 min read  •  Source: Microsoft KB5078738 • MSRC update-guide entry Related CVEs: CVE-2026-23674 Affected components: Windows Server 2025 Microsoft summary: Improper resolution of path equivalence in Windows MapUrlToZone allows an unauthorized attacker to bypass a security feature […]

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FreeBSD 15 — nas — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 15

FreeBSD 15 — nas — multiple vulnerabilities (3 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 19 July 2026 Affected versions: FreeBSD 15 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: nas — multiple vulnerabilities Related CVEs: CVE-2013-4256 CVE-2013-4257 CVE-2013-4258 Upstream summary: Hamid Zamani reports: multiple security problems (buffer overflows, format string vulnerabilities and missing input sanitising), which could lead to […]

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