chris

Common Problems 116024

Ubuntu 26.04 LTS – Docker daemon fails after cgroup configuration mismatch – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 23 June 2026 Affected versions: Ubuntu 26.04 LTS 📖 ~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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Common Problems 116127

Ubuntu 26.04 LTS – fail2ban not banning repeated SSH brute-force attempts – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 23 June 2026 Affected versions: Ubuntu 26.04 LTS 📖 ~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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Amazon Linux 2 — exiv2 — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Amazon Linux 2

Amazon Linux 2 — exiv2 — multiple vulnerabilities (20 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 ALAS2-2026-3201 Related CVEs: CVE-2026-25884 CVE-2026-27596 CVE-2026-27631 CVE-2021-31291 CVE-2025-54080 CVE-2025-55304 CVE-2024-24826 CVE-2024-25112  +12 more Upstream summary: Exiv2 is a C++ library and a command-line utility to read, write, delete and modify […]

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SLES 16 — dhcp-keama — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on SLES 16

SLES 16 — dhcp-keama — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 23 June 2026 Affected versions: SLES 16 📖 ~4 min read  •  Source: SUSE advisory SUSE-SU-2018:0810-1 (see also SUSE bugzilla) Related CVEs: CVE-2018-5732 CVE-2019-6470 CVE-2021-25217 CVE-2009-1892 CVE-2010-2156 CVE-2010-3611 CVE-2010-3616 CVE-2011-0413  +12 more Upstream summary: Failure to properly bounds-check a buffer used for processing DHCP options allows a […]

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Amazon Linux 2 — python3-tornado — multiple vulnerabilities (8 CVEs) — patch and remediation guide — diagnosis and fix on Amazon Linux 2

Amazon Linux 2 — python3-tornado — multiple vulnerabilities (8 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 ALAS2-2026-3213 Related CVEs: CVE-2026-31958 CVE-2025-67724 CVE-2025-67725 CVE-2025-67726 CVE-2026-35536 CVE-2025-47287 CVE-2024-52804 CVE-2023-28370 Upstream summary: Tornado is a Python web framework and asynchronous networking library. In versions of Tornado prior to 6.5.5, […]

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Oracle Linux 8 — .NET 8.0 — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — .NET 8.0 — vulnerability — patch and remediation guide (ELSA-2026-4455)

🟠 High   ⏱ 15–60 min  Last verified: 23 June 2026 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2026-4455 Related CVEs: CVE-2026-26130 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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SLES 16 — distribution-registry — multiple vulnerabilities (5 CVEs) — patch and remediation guide — diagnosis and fix on SLES 16

SLES 16 — distribution-registry — multiple vulnerabilities (5 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 23 June 2026 Affected versions: SLES 16 📖 ~4 min read  •  Source: SUSE advisory GHSA-f2g3-hh2r-cwgc (see also SUSE bugzilla) Related CVEs: CVE-2026-35172 CVE-2026-34986 CVE-2023-2253 CVE-2026-33540 CVE-2017-11468 Upstream summary: Distribution is a toolkit to pack, ship, store, and deliver container content. Prior to 3.1.0, distribution can restore […]

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Amazon Linux 2023 — kernel-livepatch-6.1.131-143.221 — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Amazon Linux 2023

Amazon Linux 2023 — kernel-livepatch-6.1.131-143.221 — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Amazon Linux 2023 📖 ~4 min read  •  Source: Amazon Linux advisory ALAS2023LIVEPATCH-2025-048 Related CVEs: CVE-2025-21927 CVE-2025-37785 Upstream summary: In the Linux kernel, the following vulnerability has been resolved: nvme-tcp: fix potential memory corruption in nvme_tcp_recv_pdu() (CVE-2025-21927) In the Linux kernel, the […]

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Common Problems 114102

fapolicyd blocks trusted in-house binary

🟠 High   ⏱ 5–30 min  Last verified: 22 June 2026 Affected versions: RHEL 10.0 RHEL 10.1 📖 ~1 min read Table of contents Problem Summary Symptoms Diagnostics Root Cause Primary Fix Verification Prevention Rollback Automation Command Reference Escalation Related Notes Problem Summary Application execution denied by file access policy daemon. Symptoms Users receive operation […]

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