Common Problems

Debian 11 — jline3 — vulnerability — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — jline3 — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 13 March 2023 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2023-50572 Upstream summary: An issue in the component GroovyEngine.execute of jline-groovy v3.24.1 allows attackers to cause an OOM (OutofMemory) error. Table of contents Symptom & Impact Environment & […]

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Windows Server 2019 — KB5029654 — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Windows Server 2019

Windows Server 2019 — KB5029654 — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Windows Server 2019 📖 ~4 min read  •  Source: Microsoft KB5029654 • MSRC update-guide entry Related CVEs: CVE-2023-36873 CVE-2023-36899 Affected components: Microsoft .NET Framework 3.5 AND 4.8 on Windows Server 2019 Table of contents Symptom & Impact Environment & Reproduction Root Cause […]

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Ubuntu 18.04 — giflib — multiple vulnerabilities (6 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 18.04

Ubuntu 18.04 — giflib — multiple vulnerabilities (6 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 13 March 2023 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-6824-1 Related CVEs: CVE-2021-40633 CVE-2022-28506 CVE-2023-39742 CVE-2016-3977 CVE-2018-11490 CVE-2019-15133 Upstream summary: It was discovered that GIFLIB incorrectly handled certain GIF files. An attacker could possibly use this issue to cause […]

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Ubuntu 20.04 — gcc-10 — vulnerability — patch and remediation guide — diagnosis and fix on Ubuntu 20.04

Ubuntu 20.04 — gcc-10 — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 13 March 2023 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-7700-1 Related CVEs: CVE-2023-4039 Upstream summary: It was discovered that the -fstack-protector hardening feature in GCC for AArch64 did not properly protect dynamically-sized local variables such as those created using […]

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Ubuntu 20.04 — ujson — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 20.04

Ubuntu 20.04 — ujson — multiple vulnerabilities (3 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 13 March 2023 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-6629-2 Related CVEs: CVE-2021-45958 CVE-2022-31116 CVE-2022-31117 Upstream summary: USN-6629-1 fixed vulnerabilities in UltraJSON. This update provides the corresponding updates for Ubuntu 20.04 LTS. Original advisory details: It was discovered that […]

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Oracle Linux 8 — Unbreakable Enterprise kernel-container — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — Unbreakable Enterprise kernel-container — vulnerability — patch and remediation guide (ELSA-2023-12121)

🟠 High   ⏱ 15–60 min  Last verified: 13 March 2023 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2023-12121 Related CVEs: CVE-2022-42896 CVE-2022-4139 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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Windows Server 2016 — KB5028952 — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Windows Server 2016

Windows Server 2016 — KB5028952 — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Windows Server 2016 📖 ~4 min read  •  Source: Microsoft KB5028952 • MSRC update-guide entry Related CVEs: CVE-2023-36873 CVE-2023-36899 Affected components: Microsoft .NET Framework 4.8 on Windows Server 2016 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick […]

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Oracle Linux 9 — mysql security, bug fix, and — enhancement update — new behaviour and fixes — diagnosis and fix on Oracle Linux 9

Oracle Linux 9 — mysql security, bug fix, and — enhancement update — new behaviour and fixes (ELSA-2022-6590)

🟡 Medium   ⏱ 10–30 min  Last verified: 12 March 2023 Affected versions: Oracle Linux 9 📖 ~4 min read  •  Source: ELSA advisory ELSA-2022-6590 Related CVEs: CVE-2022-21444 CVE-2022-21534 CVE-2022-21478 CVE-2022-21556 CVE-2022-21547 CVE-2022-21435 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – […]

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Common Problems 113412

Windows Server 2012 R2 NTFS MFT Fragmentation Causing Slow File Enumeration – Fix & Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 12 March 2023 Affected versions: Windows Server 2012 R2 📖 ~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 […]

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