DNS

Common Problems 124123

Oracle Linux 10 – CIFS mount fails after Kerberos library update – Fix & Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 7 March 2026 Affected versions: Oracle Linux 10 📖 ~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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Alpine Linux 3.20 — bind — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Alpine Linux 3.20

Alpine Linux 3.20 — bind — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Alpine Linux 3.20 / fixed in 9.18.7-r0 📖 ~4 min read  •  Source: Alpine secdb entry — bind 9.18.7-r0 Related CVEs: CVE-2022-2795 CVE-2022-2881 CVE-2022-2906 CVE-2022-3080 CVE-2022-38177 CVE-2022-38178 CVE-2026-3039 CVE-2026-3592  +12 more Upstream summary: Alpine main repository for vv3.20 ships bind 9.18.7-r0 which […]

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Common Problems 114535

RHEL 9: Intermittent DNS Resolution Failures

🟡 Medium   ⏱ 5–30 min  Last verified: 5 March 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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Common Problems 114076

RHEL 10 XFS Metadata Errors After Unexpected Power Loss

🔴 Critical   ⏱ 5–30 min  Last verified: 5 March 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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Common Problems 113958

RHEL 10 Chronyd Time Drift Causes Kerberos Authentication Failures

🔴 Critical   ⏱ 5–30 min  Last verified: 4 March 2026 Affected versions: RHEL 10 📖 ~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 114056

RHEL 10 Multipath Device Names Change After Reboot

🟠 High   ⏱ 5–30 min  Last verified: 4 March 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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SLES 15 — unbound — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on SLES 15

SLES 15 — unbound — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 4 March 2026 Affected versions: SLES 15 📖 ~4 min read  •  Source: SUSE advisory SUSE-SU-2024:1923-1 (see also SUSE bugzilla) Related CVEs: CVE-2022-3204 CVE-2019-25034 CVE-2019-18934 CVE-2020-12662 CVE-2020-12663 CVE-2025-11411 CVE-2024-8508 CVE-2022-30698  +12 more Upstream summary: A vulnerability named 'Non-Responsive Delegation Attack' (NRDelegation Attack) has been discovered in various […]

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

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

🟠 High   ⏱ 15–60 min  Last verified: 4 March 2026 Affected versions: SLES 16 📖 ~4 min read  •  Source: SUSE advisory SUSE-CU-2021:233-1 (see also SUSE bugzilla) Related CVEs: CVE-2020-25681 CVE-2020-25682 CVE-2020-25683 CVE-2020-25684 CVE-2020-25685 CVE-2020-25686 CVE-2020-25687 CVE-2023-49441  +12 more Upstream summary: A flaw was found in dnsmasq before version 2.83. A heap-based buffer overflow […]

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SLES 16 — aardvark-dns — vulnerability — patch and remediation guide — diagnosis and fix on SLES 16

SLES 16 — aardvark-dns — vulnerability — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 4 March 2026 Affected versions: SLES 16 📖 ~4 min read  •  Source: SUSE advisory RHSA-2025:7094 (see also SUSE bugzilla) Related CVEs: CVE-2024-8418 Upstream summary: A flaw was found in Aardvark-dns, which is vulnerable to a Denial of Service attack due to the serial processing of TCP […]

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Common Problems 113943

RHEL 10 – dnf cannot download metadata due to mirror TLS validation errors – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 3 March 2026 Affected versions: RHEL 10 📖 ~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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