Common Problems

pr cp 121493 r2

Debian 9: systemd unit enters start-limit-hit

🟠 High   ⏱ 5–30 min  Last verified: 19 May 2026 Affected versions: Debian 9 📖 ~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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pr cp 113922 r2

firewalld runtime rules disappear after reboot

🟡 Medium   ⏱ 5–30 min  Last verified: 19 May 2026 Affected versions: RHEL 10.0 RHEL 10.1 📖 ~1 min read Table of contents Problem Summary Symptoms Diagnostics Root Cause Primary Fix Verification Prevention Rollback Automation Command Reference Escalation Related Notes Problem Summary Opened ports work temporarily but close after system reboot. Symptoms firewall-cmd –list-ports […]

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FreeBSD 15 — mariadb104-server — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 15

FreeBSD 15 — mariadb104-server — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: FreeBSD 15 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: MariaDB — Nullpointer dereference Related CVEs: CVE-2018-25032 CVE-2019-1543 CVE-2019-1547 CVE-2019-15601 CVE-2019-17543 CVE-2019-2730 CVE-2019-2731 CVE-2019-2737  +12 more Upstream summary: The MariaDB project reports: MariaDB Server is vulnerable to Denial of Service. […]

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pr cp 114422 r2

RHEL 9 Firewalld Zone Rules Not Taking Effect

🟡 Medium   ⏱ 5–30 min  Last verified: 19 May 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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FreeBSD 14 — waterfox — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 14

FreeBSD 14 — waterfox — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: FreeBSD 14 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: mozilla — multiple vulnerabilities Related CVEs: CVE-2017-16541 CVE-2017-7843 CVE-2017-7844 CVE-2018-12358 CVE-2018-12359 CVE-2018-12360 CVE-2018-12361 CVE-2018-12362  +12 more Upstream summary: Mozilla Foundation reports: CVE-2019-11751: Malicious code execution through command line parameters CVE-2019-11746: […]

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pr cp 115131 r2

firewalld Blocking Required Application Port – RHEL 8 Post 029

🟡 Medium   ⏱ 5–30 min  Last verified: 19 May 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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FreeBSD 13 — apache — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 13

FreeBSD 13 — apache — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: FreeBSD 13 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: www/apache24 — Multiple vulnerabilities Related CVEs: CVE-2003-0993 CVE-2004-0113 CVE-2004-0492 CVE-2004-0747 CVE-2004-0748 CVE-2004-0751 CVE-2004-0786 CVE-2004-0809  +12 more Upstream summary: The Apache httpd project reports: mod_proxy_ajp: CVE-2026-34059, CVE-2026-34032, CVE-2026-33857, CVE-2026-28780 multiple modules: […]

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pr cp 115421 r2

NetworkManager DNS Misconfiguration Breaking Yum Access

🟡 Medium   ⏱ 5–30 min  Last verified: 19 May 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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FreeBSD 12 — waterfox — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — waterfox — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: mozilla — multiple vulnerabilities Related CVEs: CVE-2017-16541 CVE-2017-7843 CVE-2017-7844 CVE-2018-12358 CVE-2018-12359 CVE-2018-12360 CVE-2018-12361 CVE-2018-12362  +12 more Upstream summary: Mozilla Foundation reports: CVE-2019-11751: Malicious code execution through command line parameters CVE-2019-11746: […]

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pr cp 115927 r2

systemd service enters restart loop with status=203/EXEC

🟠 High   ⏱ 5–30 min  Last verified: 19 May 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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