Common Problems

Gentoo Linux — dev-python/ujson — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Gentoo Linux

Gentoo Linux — dev-python/ujson — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Gentoo Linux 📖 ~4 min read  •  Source: Gentoo GLSA GLSA-202403-03 Related CVEs: CVE-2022-31116 CVE-2022-31117 Upstream summary: Affected versions were found to improperly decode certain characters. JSON strings that contain escaped surrogate characters not part of a proper surrogate pair were decoded […]

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Common Problems 113010

Windows Server 2016 — Default gateway disappears after NIC driver update — Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 7 May 2023 Affected versions: Windows Server 2016 📖 ~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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Oracle Linux 9 — sudo — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 9

Oracle Linux 9 — sudo — vulnerability — patch and remediation guide (ELSA-2024-0811)

🟡 Medium   ⏱ 10–30 min  Last verified: 7 May 2023 Affected versions: Oracle Linux 9 📖 ~4 min read  •  Source: ELSA advisory ELSA-2024-0811 Related CVEs: CVE-2023-28487 CVE-2023-28486 CVE-2023-42465 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 8 — python3.11-cryptography — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — python3.11-cryptography — vulnerability — patch and remediation guide (ELSA-2024-3105)

🟡 Medium   ⏱ 10–30 min  Last verified: 7 May 2023 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2024-3105 Related CVEs: CVE-2023-49083 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 111789

Windows Server 2022 — Microsoft Defender Real-Time Protection Disabled by Policy Conflict — Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 7 May 2023 Affected versions: Windows Server 2022 📖 ~1 min read Table of contents Symptom & Impact Quick Checks Deep Diagnosis Primary Fix Verification Prevention & Hardening Symptom & Impact Real-time protection remains off despite endpoint protection requirements, often after conflicting baseline deployment. Malware exposure increases […]

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Windows Server 2019 — KB5029366 — security update — patch and remediation guide — diagnosis and fix on Windows Server 2019

Windows Server 2019 — KB5029366 — security update — patch and remediation guide

🔴 Critical   ⏱ 15–90 min  Last verified: 25 May 2026 Affected versions: Windows Server 2019 📖 ~4 min read  •  Source: Microsoft KB5029366 • MSRC update-guide entry Related CVEs: CVE-2023-36796 Affected components: Microsoft .NET Framework 3.5 AND 4.7.2 on Windows Server 2019 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis […]

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CentOS Stream 9 — zziplib — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on CentOS Stream 9

CentOS Stream 9 — zziplib — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 7 May 2023 Affected versions: CentOS Stream 9 📖 ~4 min read  •  Source: AlmaLinux/RHEL advisory ALSA-2025:20838 Related CVEs: CVE-2018-17828 CVE-2020-18770 Upstream summary: The zziplib is a lightweight library to easily extract data from zip files. Security Fix(es): * zziplib: directory traversal in unzzip_cat in the bins/unzzipcat-mem.c […]

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Oracle Linux 9 — qemu-kvm — security and stability fixes — required update — diagnosis and fix on Oracle Linux 9

Oracle Linux 9 — qemu-kvm — security and stability fixes — required update (ELSA-2022-5263)

🟡 Medium   ⏱ 10–30 min  Last verified: 6 May 2023 Affected versions: Oracle Linux 9 📖 ~4 min read  •  Source: ELSA advisory ELSA-2022-5263 Related CVEs: CVE-2022-26354 CVE-2022-26353 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 113032

Windows Server 2016 — Asymmetric routing through multi-homed NICs triggers firewall state drops — Fix & Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 6 May 2023 Affected versions: Windows Server 2016 📖 ~2 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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Amazon Linux 2023 — jbigkit — vulnerability — patch and remediation guide — diagnosis and fix on Amazon Linux 2023

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

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Amazon Linux 2023 📖 ~4 min read  •  Source: Amazon Linux advisory ALAS2023-2023-376 Related CVEs: CVE-2022-1210 Upstream summary: A vulnerability classified as problematic was found in LibTIFF 4.3.0. Affected by this vulnerability is the TIFF File Handler of tiff2ps. Opening a malicious […]

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