Common Problems

Common Problems 116417

Ubuntu 24.04 LTS – apt update fails with missing GPG key – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 19 May 2026 Affected versions: Ubuntu 24.04 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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Oracle Linux 9 — GraalVM — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 9

Oracle Linux 9 — GraalVM — vulnerability — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Oracle Linux 9 📖 ~4 min read  •  Source: ELSA advisory ELSA-2023-12943 Related CVEs: CVE-2023-30590 CVE-2023-22067 CVE-2023-30589 CVE-2023-22081 CVE-2023-30588 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative […]

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Common Problems 116918

Ubuntu 22.04 LTS – apt update fails with missing GPG key – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 19 May 2026 Affected versions: Ubuntu 22.04 LTS (Jammy) 📖 ~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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Oracle Linux 8 — firefox — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — firefox — vulnerability — patch and remediation guide (ELSA-2019-1764)

🔴 Critical   ⏱ 15–90 min  Last verified: 25 May 2026 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2019-1764 Related CVEs: CVE-2019-11715 CVE-2019-11712 CVE-2019-11711 CVE-2019-11717 CVE-2019-11713 CVE-2019-11730 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – […]

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Common Problems 117417

Ubuntu 20.04 APT Lock File Errors

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

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

🔴 Critical   ⏱ 15–90 min  Last verified: 25 May 2026 Affected versions: SLES 16 📖 ~4 min read  •  Source: SUSE advisory SUSE-SA:2008:046 (see also SUSE bugzilla) Related CVEs: CVE-2008-1949 CVE-2008-1948 CVE-2014-0092 CVE-2016-8610 CVE-2020-13777 CVE-2021-20231 CVE-2021-20232 CVE-2022-2509  +12 more Upstream summary: The _gnutls_recv_client_kx_message function in lib/gnutls_kx.c in libgnutls in gnutls-serv in GnuTLS before 2.2.4 […]

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Common Problems 117911

Ubuntu 18.04 APT Lock File Error During Package Install

🟡 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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SLES 15 — python311-Pillow — multiple vulnerabilities (11 CVEs) — patch and remediation guide — diagnosis and fix on SLES 15

SLES 15 — python311-Pillow — multiple vulnerabilities (11 CVEs) — patch and remediation guide

🔴 Critical   ⏱ 15–90 min  Last verified: 25 May 2026 Affected versions: SLES 15 📖 ~4 min read  •  Source: SUSE advisory openSUSE-SU-2025:14645-1 (see also SUSE bugzilla) Related CVEs: CVE-2022-30595 CVE-2020-35653 CVE-2020-35655 CVE-2021-25291 CVE-2014-3589 CVE-2014-3598 CVE-2016-0740 CVE-2016-0775  +3 more Upstream summary: libImaging/TgaRleDecode.c in Pillow 9.1.0 has a heap buffer overflow in the processing of […]

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Common Problems 118414

Ubuntu 16.04 LTS SSH login denied with Permission denied (publickey)

🟠 High   ⏱ 5–30 min  Last verified: 19 May 2026 Affected versions: 16.04 📖 ~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 […]

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SLES 12 — u-boot-rpi3 — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on SLES 12

SLES 12 — u-boot-rpi3 — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🔴 Critical   ⏱ 15–90 min  Last verified: 25 May 2026 Affected versions: SLES 12 📖 ~4 min read  •  Source: SUSE advisory SUSE-SU-2022:2052-1 (see also SUSE bugzilla) Related CVEs: CVE-2022-30790 CVE-2022-34835 CVE-2022-30552 CVE-2020-8432 CVE-2022-30767 CVE-2019-13103 CVE-2019-14192 CVE-2019-14193  +12 more Upstream summary: Das U-Boot 2022.01 has a Buffer Overflow, a different issue than CVE-2022-30552. Table […]

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