Security Hardening

Windows Server 2016 — KB5087471 — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Windows Server 2016

Windows Server 2016 — KB5087471 — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🔴 Critical   ⏱ 15–90 min  Last verified: 25 May 2026 Affected versions: Windows Server 2016 📖 ~4 min read  •  Source: Microsoft KB5087471 • MSRC update-guide entry Related CVEs: CVE-2026-35421 CVE-2026-41089 CVE-2026-32161 CVE-2026-40403 CVE-2026-21530 CVE-2026-33834 CVE-2026-34329 CVE-2026-34330  +12 more Affected components: Windows Server 2016 Windows Server 2016 (Server Core installation) Microsoft summary: Heap-based buffer […]

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Debian 13 — pypy3 — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Debian 13

Debian 13 — pypy3 — multiple vulnerabilities (20 CVEs) — patch and remediation guide

  • January 20, 2026
  • Linux
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🟠 High   ⏱ 15–60 min  Last verified: 20 January 2026 Affected versions: Debian 13 (trixie) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2015-20107 CVE-2019-20907 CVE-2020-10735 CVE-2020-26116 CVE-2020-27619 CVE-2021-23336 CVE-2021-28861 CVE-2021-29921  +12 more Upstream summary: In Python (aka CPython) up to 3.10.8, the mailcap module does not add escape characters into […]

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Common Problems 113923

RHEL 10 – SELinux denies nginx access to mounted content – Fix & Prevention

  • January 19, 2026
  • Linux
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🟠 High   ⏱ 5–30 min  Last verified: 19 January 2026 Affected versions: RHEL 10 📖 ~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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FreeBSD 15 — kf5-kauth — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 15

FreeBSD 15 — kf5-kauth — multiple vulnerabilities (2 CVEs) — patch and remediation guide

  • January 19, 2026
  • BSD
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🟢 Low   ⏱ 5–15 min  Last verified: 19 January 2026 Affected versions: FreeBSD 15 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: kf5-kauth — Insecure handling of arguments in helpers Related CVEs: CVE-2017-8422 CVE-2019-7443 Upstream summary: Albert Astals Cid reports: KAuth allows to pass parameters with arbitrary types to helpers running as […]

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NetBSD 10.0 — py-pip — multiple vulnerabilities (5 CVEs) — patch and remediation guide — diagnosis and fix on NetBSD 10.0

NetBSD 10.0 — py-pip — multiple vulnerabilities (5 CVEs) — patch and remediation guide

  • January 19, 2026
  • BSD
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🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: NetBSD 10.0 📖 ~4 min read  •  Source: pkgsrc audit-packages entry Related CVEs: CVE-2013-5123 CVE-2019-20916 CVE-2021-3572 CVE-2023-5752 CVE-2026-1703 Upstream summary: pkgsrc audit-packages flagged py{25,26,27,31,32}-pip<1.3 for vulnerability class 'insecure-temp-files'. Reference: http://secunia.com/advisories/52674/ Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis […]

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FreeBSD 15 — mcollective — vulnerability — patch and remediation guide — diagnosis and fix on FreeBSD 15

FreeBSD 15 — mcollective — vulnerability — patch and remediation guide

  • January 19, 2026
  • BSD
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🟢 Low   ⏱ 5–15 min  Last verified: 19 January 2026 Affected versions: FreeBSD 15 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: mcollective — cert valication issue Related CVEs: CVE-2014-3251 Upstream summary: Melissa Stone reports: The MCollective aes_security public key plugin does not correctly validate certs against the CA. By exploiting this […]

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Amazon Linux 2023 — cuda-documentation-12-9 — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Amazon Linux 2023

Amazon Linux 2023 — cuda-documentation-12-9 — multiple vulnerabilities (2 CVEs) — patch and remediation guide

  • January 19, 2026
  • Linux
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🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Amazon Linux 2023 📖 ~4 min read  •  Source: Amazon Linux advisory ALAS2023NVIDIA-2025-228 Related CVEs: CVE-2025-23272 CVE-2025-23247 Upstream summary: NVIDIA nvJPEG library contains a vulnerability where an attacker can cause an out-of-bounds read by means of a specially crafted JPEG file. A […]

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FreeBSD 15 — rar — vulnerability — patch and remediation guide — diagnosis and fix on FreeBSD 15

FreeBSD 15 — rar — vulnerability — patch and remediation guide

  • January 19, 2026
  • BSD
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🟢 Low   ⏱ 5–15 min  Last verified: 19 January 2026 Affected versions: FreeBSD 15 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: rar — password prompt buffer overflow vulnerability Related CVEs: CVE-2007-0855 Upstream summary: iDefense reports: Remote exploitation of a stack based buffer overflow vulnerability in RARLabs Unrar may allow an attacker […]

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FreeBSD 15 — ap20-mod_pubcookie — security advisory — patch and remediation guide — diagnosis and fix on FreeBSD 15

FreeBSD 15 — ap20-mod_pubcookie — security advisory — patch and remediation guide

  • January 19, 2026
  • BSD
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🟢 Low   ⏱ 5–15 min  Last verified: 19 January 2026 Affected versions: FreeBSD 15 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: mod_pubcookie — Empty Authentication Security Advisory Upstream summary: Nathan Dors, Pubcookie Project reports: An Abuse of Functionality vulnerability in the Pubcookie authentication process was found. This vulnerability allows an attacker […]

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