Security Hardening

Common Problems 114030

RHEL 10 – NetworkManager connection drops caused by incorrect MTU on VLAN – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 22 February 2026 Affected versions: RHEL 10.0 RHEL 10.1 📖 ~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 […]

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NetBSD 10.0 — gst-plugins1-base — multiple vulnerabilities (8 CVEs) — patch and remediation guide — diagnosis and fix on NetBSD 10.0

NetBSD 10.0 — gst-plugins1-base — multiple vulnerabilities (8 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-2019-9928 CVE-2023-37328 CVE-2023-37329 CVE-2024-4453 CVE-2025-47806 CVE-2026-2921 CVE-2025-47807 CVE-2025-47808 Upstream summary: pkgsrc audit-packages flagged gst-plugins1-base<1.16.0 for vulnerability class 'heap-overflow'. Reference: https://nvd.nist.gov/vuln/detail/CVE-2019-9928 Table of contents Symptom & Impact Environment & Reproduction […]

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FreeBSD 15 — a2ps — vulnerability — patch and remediation guide — diagnosis and fix on FreeBSD 15

FreeBSD 15 — a2ps — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 22 February 2026 Affected versions: FreeBSD 15 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: a2ps — format string vulnerability Related CVEs: CVE-2015-8107 Upstream summary: Jong-Gwon Kim reports: When user runs a2ps with malicious crafted pro(a2ps prologue) file, an attacker can execute arbitrary code. Table […]

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FreeBSD 14 — gstreamer1-plugins-bad — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 14

FreeBSD 14 — gstreamer1-plugins-bad — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 22 February 2026 Affected versions: FreeBSD 14 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: gstreamer1 — multiple vulnerabilities Related CVEs: CVE-2025-6663 CVE-2025-67326 CVE-2025-67327 CVE-2026-1940 CVE-2026-2920 CVE-2026-2921 CVE-2026-2922 CVE-2026-2923  +12 more Upstream summary: The GStreamer project reports multiple security vulnerabilities fixed in the 1.28.3 release: […]

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FreeBSD 15 — vnc — security advisory — patch and remediation guide — diagnosis and fix on FreeBSD 15

FreeBSD 15 — vnc — security advisory — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 22 February 2026 Affected versions: FreeBSD 15 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: vnc — authentication bypass vulnerability Upstream summary: RealVNC is susceptible to an authentication-bypass vulnerability. A malicious VNC client can cause a VNC server to allow it to connect without any […]

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AlmaLinux 9 — giflib — vulnerability — patch and remediation guide — diagnosis and fix on AlmaLinux 9

AlmaLinux 9 — giflib — vulnerability — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: AlmaLinux 9 📖 ~4 min read  •  Source: AlmaLinux ALSA ALSA-2026:8859 Related CVEs: CVE-2026-23868 Upstream summary: giflib is a library for reading and writing gif images. Security Fix(es): * giflib: Giflib: Double-free vulnerability leading to memory corruption (CVE-2026-23868) For more details about […]

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FreeBSD 15 — gnupg — multiple vulnerabilities (13 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 15

FreeBSD 15 — gnupg — multiple vulnerabilities (13 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 22 February 2026 Affected versions: FreeBSD 15 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: gnupg — AEAD key import overflow Related CVEs: CVE-2003-0971 CVE-2005-0366 CVE-2006-0049 CVE-2006-0455 CVE-2006-3082 CVE-2006-6235 CVE-2008-1530 CVE-2013-4402  +5 more Upstream summary: Importing an OpenPGP key having a preference list for AEAD […]

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FreeBSD 15 — libzrtpcpp — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 15

FreeBSD 15 — libzrtpcpp — multiple vulnerabilities (3 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 22 February 2026 Affected versions: FreeBSD 15 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: libzrtpcpp — multiple security vulnerabilities Related CVEs: CVE-2013-2221 CVE-2013-2222 CVE-2013-2223 Upstream summary: Mark Dowd reports: Vulnerability 1. Remote Heap Overflow: If an attacker sends a packet larger than 1024 bytes […]

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FreeBSD 15 — drm-fbsd11.2-kmod — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 15

FreeBSD 15 — drm-fbsd11.2-kmod — multiple vulnerabilities (3 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 22 February 2026 Affected versions: FreeBSD 15 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: drm graphics drivers — potential information disclusure via local access Related CVEs: CVE-2019-0154 CVE-2019-11112 CVE-2019-14615 Upstream summary: Intel reports: .A potential security vulnerability in Intel(R) Processor Graphics may allow information […]

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AlmaLinux 9 — xorg-x11-server-Xwayland — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on AlmaLinux 9

AlmaLinux 9 — xorg-x11-server-Xwayland — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: AlmaLinux 9 📖 ~4 min read  •  Source: AlmaLinux ALSA ALSA-2026:11369 Related CVEs: CVE-2026-33999 CVE-2026-34001 CVE-2026-34003 CVE-2025-49175 CVE-2025-49176 CVE-2025-49178 CVE-2025-49179 CVE-2025-49180  +12 more Upstream summary: Xwayland is an X server for running X clients under Wayland. Security Fix(es): * xorg: xwayland: X.Org […]

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