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How to Create CSS Classes – CSS Tutorial 2025–2026

How to Create CSS Classes – CSS Tutorial 2025–2026

Learning how to create CSS classes is one of the most important and frequently used skills in any CSS tutorial — CSS classes let you apply the same styles to multiple HTML elements, group elements for specific styling, reuse code efficiently, and build clean, maintainable websites. Unlike tag selectors that style all instances of an element, CSS classes give you precise control — style one paragraph red, another yellow, or give special treatment to selected images, buttons, or sections.

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Common Problems 113986

RHEL 10 SELinux AVC Denials After Custom Application Deployment

  • February 10, 2026
  • Linux
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🟠 High   ⏱ 5–30 min  Last verified: 10 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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FreeBSD 15 — linux-jdk — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 15

FreeBSD 15 — linux-jdk — multiple vulnerabilities (2 CVEs) — patch and remediation guide

  • February 10, 2026
  • BSD
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🟢 Low   ⏱ 5–15 min  Last verified: 10 February 2026 Affected versions: FreeBSD 15 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: jdk — jar directory traversal vulnerability Related CVEs: CVE-2004-1029 CVE-2005-1080 Upstream summary: Pluf has discovered a vulnerability in Sun Java JDK/SDK, which potentially can be exploited by malicious people to […]

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FreeBSD 15 — py38-bleach — vulnerability — patch and remediation guide — diagnosis and fix on FreeBSD 15

FreeBSD 15 — py38-bleach — vulnerability — patch and remediation guide

  • February 10, 2026
  • BSD
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🟢 Low   ⏱ 5–15 min  Last verified: 10 February 2026 Affected versions: FreeBSD 15 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: py-bleach — regular expression denial-of-service Related CVEs: CVE-2020-6817 Upstream summary: Bleach developers reports: bleach.clean behavior parsing style attributes could result in a regular expression denial of service (ReDoS). Calls to […]

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Amazon Linux 2023 — nodejs22 — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Amazon Linux 2023

Amazon Linux 2023 — nodejs22 — multiple vulnerabilities (20 CVEs) — patch and remediation guide

  • February 10, 2026
  • Linux
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🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Amazon Linux 2023 📖 ~4 min read  •  Source: Amazon Linux advisory ALAS2023-2026-1648 Related CVEs: CVE-2026-25547 CVE-2026-27135 CVE-2024-36137 CVE-2026-21710 CVE-2026-21713 CVE-2026-21714 CVE-2026-21715 CVE-2026-21716  +12 more Upstream summary: @isaacs/brace-expansion is a hybrid CJS/ESM TypeScript fork of brace-expansion. Prior to version 5.0.1, @isaacs/brace-expansion is […]

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FreeBSD 15 — py312-strawberry-graphql — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 15

FreeBSD 15 — py312-strawberry-graphql — multiple vulnerabilities (2 CVEs) — patch and remediation guide

  • February 10, 2026
  • BSD
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🟢 Low   ⏱ 5–15 min  Last verified: 10 February 2026 Affected versions: FreeBSD 15 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: py-strawberry-graphql — Multiple vulnerabilities Related CVEs: CVE-2026-35523 CVE-2026-35526 Upstream summary: The Strawberry GraphQL project reports: Strawberry up until version 0.312.3 is vulnerable to an authentication bypass on WebSocket subscription endpoints. […]

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Amazon Linux 2023 — python-pip — multiple vulnerabilities (13 CVEs) — patch and remediation guide — diagnosis and fix on Amazon Linux 2023

Amazon Linux 2023 — python-pip — multiple vulnerabilities (13 CVEs) — patch and remediation guide

  • February 10, 2026
  • Linux
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🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Amazon Linux 2023 📖 ~4 min read  •  Source: Amazon Linux advisory ALAS2023-2026-1689 Related CVEs: CVE-2026-6357 CVE-2026-21441 CVE-2025-66418 CVE-2025-66471 CVE-2025-8869 CVE-2025-50181 CVE-2001-1267 CVE-2007-4559  +5 more Upstream summary: pip prior to version 26.1 would run self-update check functionality after installing wheel files which […]

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Debian 13 — pwgen — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on Debian 13

Debian 13 — pwgen — multiple vulnerabilities (3 CVEs) — patch and remediation guide

  • February 10, 2026
  • Linux
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🟡 Medium   ⏱ 10–30 min  Last verified: 10 February 2026 Affected versions: Debian 13 (trixie) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2013-4440 CVE-2013-4441 CVE-2013-4442 Upstream summary: Password Generator (aka Pwgen) before 2.07 generates weak non-tty passwords, which makes it easier for context-dependent attackers to guess the password via a […]

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FreeBSD 15 — opendmarc — multiple vulnerabilities (5 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 15

FreeBSD 15 — opendmarc — multiple vulnerabilities (5 CVEs) — patch and remediation guide

  • February 10, 2026
  • BSD
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🟡 Medium   ⏱ 10–30 min  Last verified: 10 February 2026 Affected versions: FreeBSD 15 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: OpenDMARC – Remote denial of service Related CVEs: CVE-2019-16378 CVE-2019-20790 CVE-2020-12272 CVE-2020-12460 CVE-2021-34555 Upstream summary: OpenDMARC 1.4.1 and 1.4.1.1 will dereference a NULL pointer when encountering a multi-value From: header […]

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Debian 11 — gst-plugins-ugly1.0 — multiple vulnerabilities (6 CVEs) — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — gst-plugins-ugly1.0 — multiple vulnerabilities (6 CVEs) — patch and remediation guide

  • February 10, 2026
  • Linux
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🟡 Medium   ⏱ 10–30 min  Last verified: 10 February 2026 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2017-5846 CVE-2017-5847 CVE-2023-38103 CVE-2023-38104 CVE-2026-2920 CVE-2026-2922 Upstream summary: The gst_asf_demux_process_ext_stream_props function in gst/asfdemux/gstasfdemux.c in gst-plugins-ugly in GStreamer before 1.10.3 allows remote attackers to cause a denial of service […]

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