Security Hardening

FreeBSD 13 — py312-h — vulnerability — patch and remediation guide — diagnosis and fix on FreeBSD 13

FreeBSD 13 — py312-h — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 19 July 2025 Affected versions: FreeBSD 13 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: h11 accepts some malformed Chunked-Encoding bodies Related CVEs: CVE-2025-43859 Upstream summary: h11 reports: h11 is a Python implementation of HTTP/1.1. Prior to version 0.16.0, a leniency in h11's parsing of […]

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Amazon Linux 2023 — mod_auth_openidc — vulnerability — patch and remediation guide — diagnosis and fix on Amazon Linux 2023

Amazon Linux 2023 — mod_auth_openidc — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Amazon Linux 2023 📖 ~4 min read  •  Source: Amazon Linux advisory ALAS2023-2025-1188 Related CVEs: CVE-2025-31492 Upstream summary: mod_auth_openidc is an OpenID Certified authentication and authorization module for the Apache 2.x HTTP server that implements the OpenID Connect Relying Party functionality. Prior […]

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Common Problems 111187

Windows Server 2025 — VM VHD/VHDX growing unbounded on fixed-size disk due to dynamic expansion — Fix & Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 19 July 2025 Affected versions: Windows Server 2025 📖 ~2 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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Debian 12 — libfcgi-perl — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on Debian 12

Debian 12 — libfcgi-perl — multiple vulnerabilities (3 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 19 July 2025 Affected versions: Debian 12 (bookworm) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2011-2766 CVE-2012-6687 CVE-2025-40907 Upstream summary: The FCGI (aka Fast CGI) module 0.70 through 0.73 for Perl, as used by CGI::Fast, uses environment variable values from one request during […]

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Windows Server 2025 — KB5053638 — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Windows Server 2025

Windows Server 2025 — KB5053638 — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🔴 Critical   ⏱ 15–90 min  Last verified: 25 May 2026 Affected versions: Windows Server 2025 📖 ~4 min read  •  Source: Microsoft KB5053638 • MSRC update-guide entry Related CVEs: CVE-2025-24035 CVE-2025-24045 CVE-2025-24064 CVE-2025-24084 CVE-2025-26645 CVE-2024-9157 CVE-2025-24044 CVE-2025-24987  +12 more Affected components: Windows Server 2025 Microsoft summary: Sensitive data storage in improperly locked memory in […]

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CentOS Stream 9 — jackson-core — vulnerability — patch and remediation guide — diagnosis and fix on CentOS Stream 9

CentOS Stream 9 — jackson-core — vulnerability — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 19 July 2025 Affected versions: CentOS Stream 9 📖 ~4 min read  •  Source: AlmaLinux/RHEL advisory ALSA-2025:12280 Related CVEs: CVE-2025-52999 Upstream summary: Core part of Jackson that defines Streaming API as well as basic shared abstractions. Security Fix(es): * com.fasterxml.jackson.core/jackson-core: jackson-core Potential StackoverflowError (CVE-2025-52999) For more details […]

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AlmaLinux 8 — perl-Algorithm-Diff — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on AlmaLinux 8

AlmaLinux 8 — perl-Algorithm-Diff — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: AlmaLinux 8 📖 ~4 min read  •  Source: AlmaLinux ALSA ALSA-2026:8096 Related CVEs: CVE-2025-40909 CVE-2023-47038 Upstream summary: Perl is a high-level programming language that is commonly used for system administration utilities and web programming. Security Fix(es): * perl: Perl threads have a […]

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Oracle Linux 8 — Unbreakable Enterprise kernel — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — Unbreakable Enterprise kernel — vulnerability — patch and remediation guide (ELSA-2025-28048)

🟠 High   ⏱ 15–60 min  Last verified: 19 July 2025 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2025-28048 Related CVEs: CVE-2024-43876 CVE-2024-43877 CVE-2025-22058 CVE-2025-23143 CVE-2025-38678 CVE-2025-39880 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – […]

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openSUSE Tumbleweed — zk — vulnerability — patch and remediation guide — diagnosis and fix on openSUSE Tumbleweed

openSUSE Tumbleweed — zk — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: openSUSE Tumbleweed 📖 ~4 min read  •  Source: SUSE advisory SUSE-SU-2026:0439-1 (see also SUSE bugzilla) Related CVEs: CVE-2025-58181 Upstream summary: SSH servers parsing GSSAPI authentication requests do not validate the number of mechanisms specified in the request, allowing an attacker to cause […]

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Common Problems 114018

RHEL 10 DNF Lock File Contention Blocks Automated Updates

🟡 Medium   ⏱ 5–30 min  Last verified: 19 July 2025 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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CHAT