Security Hardening

Ubuntu 18.04 — postgresql-10 — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 18.04

Ubuntu 18.04 — postgresql-10 — multiple vulnerabilities (20 CVEs) — patch and remediation guide

  • February 25, 2026
  • Linux
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🟠 High   ⏱ 15–60 min  Last verified: 25 February 2026 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-7315-2 Related CVEs: CVE-2025-1094 CVE-2024-7348 CVE-2023-5868 CVE-2023-5869 CVE-2023-5870 CVE-2023-2454 CVE-2023-2455 CVE-2022-2625  +12 more Upstream summary: USN-7315-1 fixed a vulnerability in PostgreSQL. This update provides the corresponding update for Ubuntu 18.04 […]

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Red Hat Enterprise Linux 9 — poppler — vulnerability — patch and remediation guide — diagnosis and fix on Red Hat Enterprise Linux 9

Red Hat Enterprise Linux 9 — poppler — vulnerability — patch and remediation guide

  • February 25, 2026
  • Linux
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🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Red Hat Enterprise Linux 9 📖 ~4 min read  •  Source: Red Hat advisory RHSA RHSA-2026:0797 Related CVEs: CVE-2025-32365 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative […]

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SLES 16 — ovn — multiple vulnerabilities (12 CVEs) — patch and remediation guide — diagnosis and fix on SLES 16

SLES 16 — ovn — multiple vulnerabilities (12 CVEs) — patch and remediation guide

  • February 25, 2026
  • Linux
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🟠 High   ⏱ 15–60 min  Last verified: 25 February 2026 Affected versions: SLES 16 📖 ~4 min read  •  Source: SUSE advisory RHSA-2024:9158 (see also SUSE bugzilla) Related CVEs: CVE-2020-27827 CVE-2020-35498 CVE-2022-4337 CVE-2022-4338 CVE-2023-3152 CVE-2023-3966 CVE-2023-5366 CVE-2025-0650  +4 more Upstream summary: A flaw was found in multiple versions of OpenvSwitch. Specially crafted LLDP packets […]

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Common Problems 113976

RHEL 10 nftables and firewalld Direct Rules Conflict

  • February 25, 2026
  • Linux
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🟠 High   ⏱ 5–30 min  Last verified: 25 February 2026 Affected versions: RHEL 10.0 RHEL 10.1 📖 ~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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openSUSE Leap 15.6 — libQt5Gui5 — multiple vulnerabilities (4 CVEs) — patch and remediation guide — diagnosis and fix on openSUSE Leap 15.6

openSUSE Leap 15.6 — libQt5Gui5 — multiple vulnerabilities (4 CVEs) — patch and remediation guide

  • February 25, 2026
  • Linux
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🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: openSUSE Leap 15.6 📖 ~4 min read  •  Source: SUSE advisory RHSA-2024:4647 (see also SUSE bugzilla) Related CVEs: CVE-2024-39936 CVE-2025-30348 CVE-2025-5455 CVE-2023-45935 Upstream summary: An issue was discovered in HTTP2 in Qt before 5.15.18, 6.x before 6.2.13, 6.3.x through 6.5.x before 6.5.7, […]

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Oracle Linux 8 — squid:4 — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — squid:4 — vulnerability — patch and remediation guide (ELSA-2026-8317)

  • February 25, 2026
  • Linux
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🟠 High   ⏱ 15–60 min  Last verified: 25 February 2026 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2026-8317 Related CVEs: CVE-2026-32748 CVE-2026-33526 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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openSUSE Leap 15.6 — libxml2 — multiple vulnerabilities (19 CVEs) — patch and remediation guide — diagnosis and fix on openSUSE Leap 15.6

openSUSE Leap 15.6 — libxml2 — multiple vulnerabilities (19 CVEs) — patch and remediation guide

  • February 25, 2026
  • Linux
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🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: openSUSE Leap 15.6 📖 ~4 min read  •  Source: SUSE advisory RHSA-2025:12447 (see also SUSE bugzilla) Related CVEs: CVE-2025-7425 CVE-2025-49794 CVE-2025-49795 CVE-2025-49796 CVE-2025-6021 CVE-2024-56171 CVE-2022-49043 CVE-2026-0990  +11 more Upstream summary: A flaw was found in libxslt where the attribute type, atype, flags […]

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Oracle Linux 9 — grafana-pcp — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 9

Oracle Linux 9 — grafana-pcp — vulnerability — patch and remediation guide (ELSA-2025-8916)

  • February 25, 2026
  • Linux
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🟡 Medium   ⏱ 10–30 min  Last verified: 25 February 2026 Affected versions: Oracle Linux 9 📖 ~4 min read  •  Source: ELSA advisory ELSA-2025-8916 Related CVEs: CVE-2025-22871 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 — giflib — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 10

Oracle Linux 10 — giflib — vulnerability — patch and remediation guide (ELSA-2026-8858)

  • February 25, 2026
  • Linux
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🟠 High   ⏱ 15–60 min  Last verified: 25 February 2026 Affected versions: Oracle Linux 10 📖 ~4 min read  •  Source: ELSA advisory ELSA-2026-8858 Related CVEs: CVE-2026-23868 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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NetBSD 9.4 — ffmpeg5 — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on NetBSD 9.4

NetBSD 9.4 — ffmpeg5 — multiple vulnerabilities (20 CVEs) — patch and remediation guide

  • February 25, 2026
  • BSD
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🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: NetBSD 9.4 📖 ~4 min read  •  Source: pkgsrc audit-packages entry Related CVEs: CVE-2025-59734 CVE-2022-48434 CVE-2022-1475 CVE-2022-3964 CVE-2022-3965 CVE-2022-2566 CVE-2025-59728 CVE-2025-59729  +12 more Upstream summary: pkgsrc audit-packages flagged ffmpeg5-[0-9]* for vulnerability class 'use-after-free'. Reference: https://nvd.nist.gov/vuln/detail/CVE-2025-59734 Table of contents Symptom & Impact Environment […]

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