Security Hardening

NetBSD 9.4 — ruby-activestorage52 — vulnerability — patch and remediation guide — diagnosis and fix on NetBSD 9.4

NetBSD 9.4 — ruby-activestorage52 — vulnerability — patch and remediation guide

  • May 24, 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-2022-21831 Upstream summary: pkgsrc audit-packages flagged ruby{26,27,30,31}-activestorage52<5.2.6.3 for vulnerability class 'arbitrary-code-execution'. Reference: https://nvd.nist.gov/vuln/detail/CVE-2022-21831 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis […]

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Alpine Linux 3.19 — nebula — vulnerability — patch and remediation guide — diagnosis and fix on Alpine Linux 3.19

Alpine Linux 3.19 — nebula — vulnerability — patch and remediation guide

  • May 24, 2026
  • Linux
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🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Alpine Linux 3.19 / fixed in 1.7.2-r5 📖 ~4 min read  •  Source: Alpine secdb entry — nebula 1.7.2-r5 Related CVEs: CVE-2023-48795 Upstream summary: Alpine community repository for vv3.19 ships nebula 1.7.2-r5 which addresses CVE-2023-48795. Table of contents Symptom & Impact Environment […]

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AlmaLinux 8 — openhpi — vulnerability — patch and remediation guide — diagnosis and fix on AlmaLinux 8

AlmaLinux 8 — openhpi — vulnerability — patch and remediation guide

  • May 24, 2026
  • Linux
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🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: AlmaLinux 8 📖 ~4 min read  •  Source: AlmaLinux ALSA ALBA-2022:2041 Upstream summary: For detailed information on changes in this release, see the AlmaLinux Release Notes linked from the References section. Table of contents Symptom & Impact Environment & Reproduction Root Cause […]

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Amazon Linux 2023 — mariadb105 — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Amazon Linux 2023

Amazon Linux 2023 — mariadb105 — multiple vulnerabilities (20 CVEs) — patch and remediation guide

  • May 24, 2026
  • Linux
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🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Amazon Linux 2023 📖 ~4 min read  •  Source: Amazon Linux advisory ALAS2023-2023-155 Related CVEs: CVE-2022-31622 CVE-2022-31623 CVE-2022-32091 CVE-2022-38791 CVE-2022-47015 CVE-2021-2372 CVE-2021-2389 CVE-2021-35604  +12 more Upstream summary: MariaDB v10.7 was discovered to contain an use-after-poison in in __interceptor_memset at /libsanitizer/sanitizer_common/sanitizer_common_interceptors.inc. (CVE-2022-32091) In […]

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Windows Server 2019 — KB5052000 — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Windows Server 2019

Windows Server 2019 — KB5052000 — 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 KB5052000 • MSRC update-guide entry Related CVEs: CVE-2025-21376 CVE-2025-26634 CVE-2025-21351 CVE-2025-21352 CVE-2025-21368 CVE-2025-21369 CVE-2025-21375 CVE-2025-21391  +12 more Affected components: Windows Server 2019 (Server Core installation) Table of contents Symptom & Impact Environment […]

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NetBSD 9.4 — ruby-activestorage60 — vulnerability — patch and remediation guide — diagnosis and fix on NetBSD 9.4

NetBSD 9.4 — ruby-activestorage60 — vulnerability — patch and remediation guide

  • May 24, 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-2022-21831 Upstream summary: pkgsrc audit-packages flagged ruby{26,27,30,31}-activestorage60<6.0.4.7 for vulnerability class 'arbitrary-code-execution'. Reference: https://nvd.nist.gov/vuln/detail/CVE-2022-21831 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis […]

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Alpine Linux 3.19 — neomutt — vulnerability — patch and remediation guide — diagnosis and fix on Alpine Linux 3.19

Alpine Linux 3.19 — neomutt — vulnerability — patch and remediation guide

  • May 24, 2026
  • Linux
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🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Alpine Linux 3.19 / fixed in 20211015-r0 📖 ~4 min read  •  Source: Alpine secdb entry — neomutt 20211015-r0 Related CVEs: CVE-2021-32055 Upstream summary: Alpine community repository for vv3.19 ships neomutt 20211015-r0 which addresses CVE-2021-32055. Table of contents Symptom & Impact Environment […]

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openSUSE Tumbleweed — apache-sshd — vulnerability — patch and remediation guide — diagnosis and fix on openSUSE Tumbleweed

openSUSE Tumbleweed — apache-sshd — vulnerability — patch and remediation guide

  • May 24, 2026
  • Linux
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🔴 Critical   ⏱ 15–90 min  Last verified: 25 May 2026 Affected versions: openSUSE Tumbleweed 📖 ~4 min read  •  Source: SUSE advisory SUSE-SU-2024:0224-1 (see also SUSE bugzilla) Related CVEs: CVE-2022-45047 Upstream summary: Class org.apache.sshd.server.keyprovider.SimpleGeneratorHostKeyProvider in Apache MINA SSHD <= 2.9.1 uses Java deserialization to load a serialized java.security.PrivateKey. The class is one of several […]

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AlmaLinux 8 — openmpi — vulnerability — patch and remediation guide — diagnosis and fix on AlmaLinux 8

AlmaLinux 8 — openmpi — vulnerability — patch and remediation guide

  • May 24, 2026
  • Linux
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🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: AlmaLinux 8 📖 ~4 min read  •  Source: AlmaLinux ALSA ALEA-2022:2014 Upstream summary: For detailed information on changes in this release, see the AlmaLinux Release Notes linked from the References section. Table of contents Symptom & Impact Environment & Reproduction Root Cause […]

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Amazon Linux 2023 — tar — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Amazon Linux 2023

Amazon Linux 2023 — tar — multiple vulnerabilities (2 CVEs) — patch and remediation guide

  • May 24, 2026
  • Linux
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🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Amazon Linux 2023 📖 ~4 min read  •  Source: Amazon Linux advisory ALAS2023-2023-153 Related CVEs: CVE-2022-48303 CVE-2023-39804 Upstream summary: GNU Tar through 1.34 has a one-byte out-of-bounds read that results in use of uninitialized memory for a conditional jump. Exploitation to change […]

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