Security Hardening

Ubuntu 24.04 — linux-oracle — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 24.04

Ubuntu 24.04 — linux-oracle — multiple vulnerabilities (20 CVEs) — patch and remediation guide

  • January 21, 2026
  • Linux
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🟠 High   ⏱ 15–60 min  Last verified: 21 January 2026 Affected versions: Ubuntu 24.04 (noble) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-8254-1 Related CVEs: CVE-2026-23112 CVE-2026-23231 CVE-2026-23273 CVE-2024-36347 CVE-2024-57795 CVE-2025-22022 CVE-2025-22111 CVE-2025-38022  +12 more Upstream summary: Several security issues were discovered in the Linux kernel. An attacker could possibly use these […]

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Oracle Linux 9 — kernel — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 9

Oracle Linux 9 — kernel — vulnerability — patch and remediation guide (ELSA-2026-6153)

  • January 21, 2026
  • Linux
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🟡 Medium   ⏱ 10–30 min  Last verified: 21 January 2026 Affected versions: Oracle Linux 9 📖 ~4 min read  •  Source: ELSA advisory ELSA-2026-6153 Related CVEs: CVE-2025-38180 CVE-2025-40096 CVE-2026-23144 CVE-2026-23171 CVE-2026-23191 CVE-2026-23193 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – […]

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Oracle Linux 8 — java-17-openjdk — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — java-17-openjdk — vulnerability — patch and remediation guide (ELSA-2025-18821)

  • January 21, 2026
  • Linux
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🟡 Medium   ⏱ 10–30 min  Last verified: 21 January 2026 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2025-18821 Related CVEs: CVE-2025-53057 CVE-2025-53066 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 2019 — KB5053606 — multiple vulnerabilities (20 CVEs) — patch and remediation guide

Windows Server 2019 — KB5053606 — 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 KB5053606 • MSRC update-guide entry Related CVEs: CVE-2025-24035 CVE-2025-26645 CVE-2024-9157 CVE-2025-24044 CVE-2025-24987 CVE-2025-24988 CVE-2025-21180 CVE-2025-24995  +12 more Affected components: Windows Server 2019 (Server Core installation) Microsoft summary: Sensitive data storage in improperly […]

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Oracle Linux 10 — libpng — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 10

Oracle Linux 10 — libpng — vulnerability — patch and remediation guide (ELSA-2026-14790)

  • January 21, 2026
  • Linux
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🟡 Medium   ⏱ 10–30 min  Last verified: 21 January 2026 Affected versions: Oracle Linux 10 📖 ~4 min read  •  Source: ELSA advisory ELSA-2026-14790 Related CVEs: CVE-2026-33636 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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Oracle Linux 10 — exiv2 — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 10

Oracle Linux 10 — exiv2 — vulnerability — patch and remediation guide (ELSA-2025-7457)

  • January 21, 2026
  • Linux
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🟡 Medium   ⏱ 10–30 min  Last verified: 21 January 2026 Affected versions: Oracle Linux 10 📖 ~4 min read  •  Source: ELSA advisory ELSA-2025-7457 Related CVEs: CVE-2025-26623 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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Fedora 42 — python3.11 — multiple vulnerabilities (6 CVEs) — patch and remediation guide — diagnosis and fix on Fedora 42

Fedora 42 — python3.11 — multiple vulnerabilities (6 CVEs) — patch and remediation guide

  • January 21, 2026
  • Linux
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🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Fedora 42 📖 ~4 min read  •  Source: Fedora update FEDORA-2026-dd34c4467b Related CVEs: CVE-2026-1502 CVE-2026-4786 CVE-2026-6100 CVE-2026-2297 CVE-2026-4224 CVE-2026-3644 Upstream summary: Security fixes for CVE-2026-1502, CVE-2026-4786, CVE-2026-6100, CVE-2026-2297, CVE 2026-3644, CVE-2026-4224 Table of contents Symptom & Impact Environment & Reproduction Root Cause […]

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Oracle Linux 9 — nodejs:20 — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 9

Oracle Linux 9 — nodejs:20 — vulnerability — patch and remediation guide (ELSA-2026-7896)

  • January 21, 2026
  • Linux
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🟠 High   ⏱ 15–60 min  Last verified: 21 January 2026 Affected versions: Oracle Linux 9 📖 ~4 min read  •  Source: ELSA advisory ELSA-2026-7896 Related CVEs: CVE-2026-21710 CVE-2026-26996 CVE-2026-27135 CVE-2026-27904 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches […]

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CentOS Stream 10 — kea — multiple vulnerabilities (5 CVEs) — patch and remediation guide — diagnosis and fix on CentOS Stream 10

CentOS Stream 10 — kea — multiple vulnerabilities (5 CVEs) — patch and remediation guide

  • January 21, 2026
  • Linux
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🟠 High   ⏱ 15–60 min  Last verified: 21 January 2026 Affected versions: CentOS Stream 10 📖 ~4 min read  •  Source: AlmaLinux/RHEL advisory ALSA-2026:7342 Related CVEs: CVE-2026-3608 CVE-2025-11232 CVE-2025-32801 CVE-2025-32802 CVE-2025-32803 Upstream summary: DHCP implementation from Internet Systems Consortium, Inc. that features fully functional DHCPv4, DHCPv6 and Dynamic DNS servers. Both DHCP servers fully […]

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SLES 15 — python3-pyasn1 — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on SLES 15

SLES 15 — python3-pyasn1 — multiple vulnerabilities (2 CVEs) — patch and remediation guide

  • January 21, 2026
  • Linux
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🟠 High   ⏱ 15–60 min  Last verified: 21 January 2026 Affected versions: SLES 15 📖 ~4 min read  •  Source: SUSE advisory RHSA-2026:12176 (see also SUSE bugzilla) Related CVEs: CVE-2026-30922 CVE-2026-23490 Upstream summary: pyasn1 is a generic ASN.1 library for Python. Prior to 0.6.3, the `pyasn1` library is vulnerable to a Denial of Service […]

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