Common Problems

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

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

🟠 High   ⏱ 15–60 min  Last verified: 4 March 2026 Affected versions: Debian 13 (trixie) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-1999-0710 CVE-2002-0713 CVE-2002-0714 CVE-2002-0715 CVE-2002-0916 CVE-2004-0189 CVE-2004-0541 CVE-2004-0832  +12 more Upstream summary: The Squid package in Red Hat Linux 5.2 and 6.0, and other distributions, installs cachemgr.cgi in […]

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Windows Server 2016 — KB5087545 — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Windows Server 2016

Windows Server 2016 — KB5087545 — 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 KB5087545 • 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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Ubuntu 20.04 — linux-aws — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 20.04

Ubuntu 20.04 — linux-aws — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 4 March 2026 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-8273-1 Related CVEs: CVE-2024-50304 CVE-2026-23112 CVE-2026-23209 CVE-2026-31431 CVE-2026-31504 CVE-2026-31533 CVE-2026-43033 CVE-2026-43077  +12 more Upstream summary: Several security issues were discovered in the Linux kernel. An attacker could possibly use these […]

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AlmaLinux 10 — gstreamer1-plugins-good — multiple vulnerabilities (7 CVEs) — patch and remediation guide — diagnosis and fix on AlmaLinux 10

AlmaLinux 10 — gstreamer1-plugins-good — multiple vulnerabilities (7 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: AlmaLinux 10 📖 ~4 min read  •  Source: AlmaLinux ALSA ALSA-2026:6259 Related CVEs: CVE-2026-2920 CVE-2026-2921 CVE-2026-2922 CVE-2026-2923 CVE-2026-3082 CVE-2026-3083 CVE-2026-3085 Upstream summary: GStreamer is a streaming media framework based on graphs of filters which operate on media data. The gstreamer1-plugins-bad-free package contains […]

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Common Problems 113943

RHEL 10 – dnf cannot download metadata due to mirror TLS validation errors – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 3 March 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 — py37-matrix-synapse — multiple vulnerabilities (8 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 15

FreeBSD 15 — py37-matrix-synapse — multiple vulnerabilities (8 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 3 March 2026 Affected versions: FreeBSD 15 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: py-matrix-synapse — unbounded recursion in urlpreview Related CVEs: CVE-2019-5885 CVE-2020-26257 CVE-2020-26891 CVE-2021-29471 CVE-2021-39163 CVE-2021-39164 CVE-2021-41281 CVE-2022-31052 Upstream summary: Matrix developers report: This release fixes a vulnerability with Synapse's URL preview […]

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AlmaLinux 10 — dotnet8.0 — multiple vulnerabilities (5 CVEs) — patch and remediation guide — diagnosis and fix on AlmaLinux 10

AlmaLinux 10 — dotnet8.0 — multiple vulnerabilities (5 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: AlmaLinux 10 📖 ~4 min read  •  Source: AlmaLinux ALSA ALSA-2026:8470 Related CVEs: CVE-2026-26171 CVE-2026-32178 CVE-2026-32203 CVE-2026-33116 CVE-2026-26130 Upstream summary: .NET is a managed-software framework. It implements a subset of the .NET framework APIs and several new APIs, and it includes a […]

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FreeBSD 15 — varnish-libvmod-digest — vulnerability — patch and remediation guide — diagnosis and fix on FreeBSD 15

FreeBSD 15 — varnish-libvmod-digest — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 3 March 2026 Affected versions: FreeBSD 15 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: www/varnish-libvmod-digest — base64 decoding vulnerability Related CVEs: CVE-2023-41104 Upstream summary: varnish developers report: Common usage of vmod-digest is for basic HTTP authentication, in which case it may be possible for […]

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Windows Server 2025 — KB5087423 — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Windows Server 2025

Windows Server 2025 — KB5087423 — 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 KB5087423 • MSRC update-guide entry Related CVEs: CVE-2026-35421 CVE-2026-41089 CVE-2026-41096 CVE-2026-32161 CVE-2026-40403 CVE-2026-21530 CVE-2026-33834 CVE-2026-33839  +12 more Affected components: Windows Server 2025 Microsoft summary: Heap-based buffer overflow in Windows GDI allows an […]

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FreeBSD 15 — linux-blackdown-jdk — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 15

FreeBSD 15 — linux-blackdown-jdk — multiple vulnerabilities (3 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 3 March 2026 Affected versions: FreeBSD 15 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: jdk/jre — Applet Caching May Allow Network Access Restrictions to be Circumvented Related CVEs: CVE-2004-1029 CVE-2005-1080 CVE-2007-5232 Upstream summary: SUN reports: A vulnerability in the Java Runtime Environment (JRE) with […]

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