Linux

Common Problems 117551

Ubuntu 20.04 LTS – time sync unstable due to chrony and systemd-timesyncd conflict – Fix & Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 18 July 2021 Affected versions: Ubuntu 20.04 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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AlmaLinux 8 — kbd — vulnerability — patch and remediation guide — diagnosis and fix on AlmaLinux 8

AlmaLinux 8 — kbd — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: AlmaLinux 8 📖 ~4 min read  •  Source: AlmaLinux ALSA ALBA-2020:4580 Upstream summary: For detailed information on changes in this release, see the AlmaLinux Release Notes linked from the References section. Table of contents Symptom & Impact Environment & Reproduction Root Cause […]

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AlmaLinux 8 — qt5-qtgraphicaleffects — vulnerability — patch and remediation guide — diagnosis and fix on AlmaLinux 8

AlmaLinux 8 — qt5-qtgraphicaleffects — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: AlmaLinux 8 📖 ~4 min read  •  Source: AlmaLinux ALSA ALSA-2021:4172 Related CVEs: CVE-2021-3481 Upstream summary: Qt is a software toolkit for developing applications. The following packages have been upgraded to a later upstream version: adwaita-qt (1.2.1), python-qt5 (5.15.0), qgnomeplatform (0.7.1), qt5 […]

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AlmaLinux 8 — openblas — vulnerability — patch and remediation guide — diagnosis and fix on AlmaLinux 8

AlmaLinux 8 — openblas — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: AlmaLinux 8 📖 ~4 min read  •  Source: AlmaLinux ALSA ALSA-2022:7639 Related CVEs: CVE-2021-4048 Upstream summary: OpenBLAS is an optimized BLAS library based on GotoBLAS2 1.13 BSD version. Security Fix(es): * lapack: Out-of-bounds read in *larrv (CVE-2021-4048) For more details about the […]

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Arch Linux — ppp — vulnerability — patch and remediation guide — diagnosis and fix on Arch Linux

Arch Linux — ppp — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Arch Linux (rolling release) 📖 ~4 min read  •  Source: Arch ASA ASA-202003-3 Related CVEs: CVE-2020-8597 Upstream summary: Type: arbitrary code execution. Status: Fixed. Affected: 2.4.7-6. Fixed in: 2.4.7-7. Group: AVG-1101. Table of contents Symptom & Impact Environment & Reproduction Root Cause […]

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Ubuntu 20.04 — horizon — vulnerability — patch and remediation guide — diagnosis and fix on Ubuntu 20.04

Ubuntu 20.04 — horizon — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 18 July 2021 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-4675-1 Related CVEs: CVE-2020-29565 Upstream summary: Pritam Singh discovered that OpenStack Horizon incorrectly validated certain parameters. An attacker could possibly use this issue to cause OpenStack Horizon to redirect to […]

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

Oracle Linux 8 — Unbreakable Enterprise kernel-container — vulnerability — patch and remediation guide (ELSA-2021-9406)

🟠 High   ⏱ 15–60 min  Last verified: 18 July 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2021-9406 Related CVEs: CVE-2020-26145 CVE-2020-24587 CVE-2021-33909 CVE-2020-26147 CVE-2021-3564 CVE-2020-24588 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – […]

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Arch Linux — vivaldi — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Arch Linux

Arch Linux — vivaldi — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🔴 Critical   ⏱ 15–90 min  Last verified: 25 May 2026 Affected versions: Arch Linux (rolling release) 📖 ~4 min read  •  Source: Arch ASA ASA-202106-32 Related CVEs: CVE-2021-30553 CVE-2021-30552 CVE-2021-30551 CVE-2021-30550 CVE-2021-30549 CVE-2021-30548 CVE-2021-30547 CVE-2021-30546  +12 more Upstream summary: Type: multiple issues. Status: Fixed. Affected: 4.0.2312.24-1. Fixed in: 4.0.2312.25-1. Group: AVG-2058. Table of contents […]

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