Security Hardening

Amazon Linux 2 — kernel-livepatch-5.10.248-247.988 — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Amazon Linux 2

Amazon Linux 2 — kernel-livepatch-5.10.248-247.988 — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Amazon Linux 2 📖 ~4 min read  •  Source: Amazon Linux advisory ALAS2LIVEPATCH-2026-294 Related CVEs: CVE-2026-43284 CVE-2026-31431 Upstream summary: In the Linux kernel, the following vulnerability has been resolved: xfrm: esp: avoid in-place decrypt on shared skb frags "Dirty Frag" and other […]

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SLES 15 — python311-h11 — vulnerability — patch and remediation guide — diagnosis and fix on SLES 15

SLES 15 — python311-h11 — vulnerability — patch and remediation guide

🔴 Critical   ⏱ 15–90 min  Last verified: 8 June 2026 Affected versions: SLES 15 📖 ~4 min read  •  Source: SUSE advisory SUSE-SU-2025:1430-1 (see also SUSE bugzilla) Related CVEs: CVE-2025-43859 Upstream summary: h11 is a Python implementation of HTTP/1.1. Prior to version 0.16.0, a leniency in h11's parsing of line terminators in chunked-coding message […]

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FreeBSD 15 — gstreamer — multiple vulnerabilities (17 CVEs) — patch and remediation guide

FreeBSD 15 — gstreamer — multiple vulnerabilities (17 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: FreeBSD 15 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: gstreamer1 — multiple vulnerabilities Related CVEs: CVE-2026-1940 CVE-2026-2920 CVE-2026-2921 CVE-2026-2922 CVE-2026-2923 CVE-2026-3081 CVE-2026-3082 CVE-2026-3083  +9 more Upstream summary: The GStreamer project reports multiple security vulnerabilities fixed in the 1.28.3 release: […]

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Oracle Linux 10 — .NET 9.0 — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 10

Oracle Linux 10 — .NET 9.0 — vulnerability — patch and remediation guide (ELSA-2025-8816)

🟠 High   ⏱ 15–60 min  Last verified: 8 June 2026 Affected versions: Oracle Linux 10 📖 ~4 min read  •  Source: ELSA advisory ELSA-2025-8816 Related CVEs: CVE-2025-30399 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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FreeBSD 15 — mariadb102-server — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 15

FreeBSD 15 — mariadb102-server — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 8 June 2026 Affected versions: FreeBSD 15 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: MySQL Server — Multiple vulerabilities Related CVEs: CVE-2016-9843 CVE-2017-10155 CVE-2017-10165 CVE-2017-10167 CVE-2017-10203 CVE-2017-10227 CVE-2017-10268 CVE-2017-10276  +12 more Upstream summary: Oracle reports: This Critical Patch Update contains 45 new security patches […]

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NetBSD 10.0 — rebar3 — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on NetBSD 10.0

NetBSD 10.0 — rebar3 — multiple vulnerabilities (3 CVEs) — patch and remediation guide

🟡 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-2019-1000014 CVE-2020-13802 CVE-2026-21619 Upstream summary: pkgsrc audit-packages flagged rebar3>3.7<3.8.0 for vulnerability class 'oracle-attack'. Reference: https://nvd.nist.gov/vuln/detail/CVE-2019-1000014 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage […]

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How to Set Up Two-Factor Authentication (2FA) for SSH on Ubuntu 26.04 — step-by-step Linux tutorial on Progressive Robot

How to Manage AppArmor Profiles on Ubuntu 26.04

AppArmor (Application Armor) is a Linux kernel security module that restricts program capabilities using per-program profiles. It is enabled by default on Ubuntu and provides Mandatory Access Control (MAC) to contain the blast radius of exploited applications. This guide manages AppArmor profiles on Ubuntu 26.04 LTS. Tested and valid on: Ubuntu 26.04 LTS Prerequisites Ubuntu […]

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NetBSD 10.0 — metabase — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on NetBSD 10.0

NetBSD 10.0 — metabase — multiple vulnerabilities (3 CVEs) — patch and remediation guide

🟡 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-2026-22805 CVE-2026-27464 CVE-2025-5895 Upstream summary: pkgsrc audit-packages flagged metabase<56.3 for vulnerability class 'server-side-request-forgery'. Reference: https://nvd.nist.gov/vuln/detail/CVE-2026-22805 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage […]

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IBM AIX 7.2 — CVE-2026-2485 — xss — patch and remediation guide — diagnosis and fix on IBM AIX 7.2

IBM AIX 7.2 — CVE-2026-2485 — xss — patch and remediation guide

🟡 Medium   ⏱ 15–45 min  Last verified: 7 June 2026 Affected versions: IBM AIX 7.2 📖 ~4 min read  •  Source: NVD CVE-2026-2485, IBM Support Bulletin CVE: CVE-2026-2485 NVD summary: IBM Infosphere Information Server 11.7.0.0 through 11.7.1.6 is vulnerable to stored cross-site scripting. This vulnerability allows a privileged user to embed arbitrary JavaScript code in the […]

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NetBSD 10.0 — liboqs — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on NetBSD 10.0

NetBSD 10.0 — liboqs — multiple vulnerabilities (3 CVEs) — patch and remediation guide

🟡 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-2024-54137 CVE-2025-48946 CVE-2025-52473 Upstream summary: pkgsrc audit-packages flagged liboqs<0.12.0 for vulnerability class 'incorrect-decapsulation'. Reference: https://nvd.nist.gov/vuln/detail/CVE-2024-54137 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage […]

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