Troubleshooting

AlmaLinux 8 — resource-agents — multiple vulnerabilities (12 CVEs) — patch and remediation guide — diagnosis and fix on AlmaLinux 8

AlmaLinux 8 — resource-agents — multiple vulnerabilities (12 CVEs) — patch and remediation guide

  • July 23, 2026
  • Linux
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🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: AlmaLinux 8 📖 ~4 min read  •  Source: AlmaLinux ALSA ALSA-2026:13902 Related CVEs: CVE-2026-30922 CVE-2026-23490 CVE-2025-66418 CVE-2025-66471 CVE-2026-21441 CVE-2024-47081 CVE-2024-37891 CVE-2024-6345  +4 more Upstream summary: The resource-agents packages provide the Pacemaker and RGManager service managers with a set of scripts. These scripts […]

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Oracle Linux 10 — kernel — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 10

Oracle Linux 10 — kernel — vulnerability — patch and remediation guide (ELSA-2026-1690)

  • July 23, 2026
  • Linux
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🟠 High   ⏱ 15–60 min  Last verified: 23 July 2026 Affected versions: Oracle Linux 10 📖 ~4 min read  •  Source: ELSA advisory ELSA-2026-1690 Related CVEs: CVE-2025-37819 CVE-2025-38022 CVE-2025-38349 CVE-2025-38453 CVE-2025-38568 CVE-2025-38731 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – […]

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SLES 16 — tomcat — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on SLES 16

SLES 16 — tomcat — multiple vulnerabilities (20 CVEs) — patch and remediation guide

  • July 23, 2026
  • Linux
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🔴 Critical   ⏱ 15–90 min  Last verified: 23 July 2026 Affected versions: SLES 16 📖 ~4 min read  •  Source: SUSE advisory SUSE-SU-2018:2699-1 (see also SUSE bugzilla) Related CVEs: CVE-2018-8037 CVE-2024-52316 CVE-2026-29146 CVE-2026-32990 CVE-2026-34486 CVE-2025-66614 CVE-2025-55752 CVE-2016-3092  +12 more Upstream summary: If an async request was completed by the application at the same time […]

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Fedora 42 — lemonldap-ng — vulnerability — patch and remediation guide — diagnosis and fix on Fedora 42

Fedora 42 — lemonldap-ng — vulnerability — patch and remediation guide

  • July 23, 2026
  • Linux
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🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Fedora 42 📖 ~4 min read  •  Source: Fedora update FEDORA-2026-69743812a7 Upstream summary: Update to 2.22.3 https://projects.ow2.org/view/lemonldap-ng/lemonldap-ng-2-22-3-is-out/ Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification […]

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

Oracle Linux 8 — Unbreakable Enterprise kernel — vulnerability — patch and remediation guide (ELSA-2026-50280)

  • July 23, 2026
  • Linux
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🟠 High   ⏱ 15–60 min  Last verified: 23 July 2026 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2026-50280 Related CVEs: CVE-2026-46333 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance […]

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Common Problems 116068

journalctl missing persistent logs after reboot

🟡 Medium   ⏱ 5–30 min  Last verified: 23 July 2026 Affected versions: Ubuntu 26.04 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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Common Problems 114492

RHEL 9 Kernel Update Installed but Old Kernel Still Boots

  • July 23, 2026
  • Linux
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🟡 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

  • July 23, 2026
  • Linux
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🟠 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

  • July 23, 2026
  • Linux
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🟠 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

  • July 23, 2026
  • Linux
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🟠 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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AIX AlmaLinux Alpine Linux authentication authorization Backup Recovery Boot Startup Cloud Integration Common Problems Cpu Memory Database Debian Debian 11 Debian 12 Bookworm Debian 13 Trixie DNS Firewall Fix Prevention FreeBSD FreeBSD 12 FreeBSD 13 FreeBSD 14 FreeBSD 15 Kernel Drivers Logging Monitoring Lvm Raid NetBSD Networking openSUSE Operations Oracle Linux Oracle Linux 8 Oracle Linux 9 Package Management Performance Proxy Security Hardening SLES Storage Disk Systemd Services Tls Ssl Troubleshooting ubuntu VPN windows server
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