Linux

Common Problems 114492

RHEL 9 Kernel Update Installed but Old Kernel Still Boots

🟡 Medium   ⏱ 5–30 min  Last verified: 23 July 2026 📖 ~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 & Cross-Refs References & Further […]

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

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

🟠 High   ⏱ 15–60 min  Last verified: 23 July 2026 Affected versions: Debian 13 (trixie) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2012-0871 CVE-2012-1101 CVE-2012-1174 CVE-2013-4327 CVE-2013-4391 CVE-2013-4392 CVE-2013-4393 CVE-2013-4394  +12 more Upstream summary: The session_link_x11_socket function in login/logind-session.c in systemd-logind in systemd, possibly 37 and earlier, allows local users […]

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Ubuntu 20.04 — linux — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 20.04

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

🟠 High   ⏱ 15–60 min  Last verified: 23 July 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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Debian 13 — cups — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Debian 13

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

🟠 High   ⏱ 15–60 min  Last verified: 23 July 2026 Affected versions: Debian 13 (trixie) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2002-1366 CVE-2002-1367 CVE-2002-1368 CVE-2002-1369 CVE-2002-1371 CVE-2002-1372 CVE-2002-1383 CVE-2002-1384  +12 more Upstream summary: Common Unix Printing System (CUPS) 1.1.14 through 1.1.17 allows local users with lp privileges to create […]

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AlmaLinux 8 — python2-pycairo — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on AlmaLinux 8

AlmaLinux 8 — python2-pycairo — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: AlmaLinux 8 📖 ~4 min read  •  Source: AlmaLinux ALSA ALSA-2026:17533 Related CVEs: CVE-2026-4150 CVE-2026-4153 CVE-2026-4154 CVE-2026-4887 CVE-2026-0797 CVE-2026-2044 CVE-2026-2045 CVE-2026-2048  +12 more Upstream summary: The GIMP (GNU Image Manipulation Program) is an image composition and editing program. GIMP provides a large […]

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AlmaLinux 10 — libsoup3 — multiple vulnerabilities (12 CVEs) — patch and remediation guide — diagnosis and fix on AlmaLinux 10

AlmaLinux 10 — libsoup3 — multiple vulnerabilities (12 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-2026:2410 Related CVEs: CVE-2026-1761 CVE-2026-0719 CVE-2025-14523 CVE-2025-11021 CVE-2025-4945 CVE-2025-32049 CVE-2025-32907 CVE-2025-4035  +4 more Upstream summary: Libsoup is an HTTP library implementation in C. It was originally part of a SOAP (Simple Object […]

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How to Secure MySQL 9 on Ubuntu 26.04 — step-by-step Linux tutorial on Progressive Robot

How to Install Redis 8 on Ubuntu 26.04

Redis is an in-memory data structure store used as a cache, message broker, and database. Redis 8 introduces improved memory efficiency, better persistence options, and enhanced cluster management. This guide installs and secures Redis 8 on Ubuntu 26.04 LTS. Tested and valid on: Ubuntu 26.04 LTS Prerequisites Ubuntu 26.04 LTS server A user with sudo […]

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AlmaLinux 9 — python3.12 — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on AlmaLinux 9

AlmaLinux 9 — python3.12 — 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-2026:10745 Related CVEs: CVE-2026-4786 CVE-2026-6100 CVE-2026-4519 CVE-2024-12718 CVE-2025-4138 CVE-2025-4330 CVE-2025-4435 CVE-2025-4517  +12 more Upstream summary: Python is an interpreted, interactive, object-oriented programming language, which includes modules, classes, exceptions, very high level dynamic […]

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AlmaLinux 9 — image-builder — multiple vulnerabilities (5 CVEs) — patch and remediation guide — diagnosis and fix on AlmaLinux 9

AlmaLinux 9 — image-builder — multiple vulnerabilities (5 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-2026:13671 Related CVEs: CVE-2026-25679 CVE-2025-61726 CVE-2025-61729 CVE-2025-68121 CVE-2025-58183 Upstream summary: A local binary for building customized OS artifacts such as VM images and OSTree commits. Uses osbuild under the hood. Security Fix(es): […]

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Debian 13 — erlang-cowlib — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Debian 13

Debian 13 — erlang-cowlib — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 22 July 2026 Affected versions: Debian 13 (trixie) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2026-43970 CVE-2026-7790 Upstream summary: Improper Handling of Highly Compressed Data (Data Amplification) vulnerability in ninenines cowlib allows unauthenticated remote denial of service via memory exhaustion. cow_spdy:inflate/2 in cowlib […]

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