Linux

Debian 11 — edk2 — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — edk2 — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 16 September 2021 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2018-12178 CVE-2018-12179 CVE-2018-12180 CVE-2018-12181 CVE-2018-12183 CVE-2019-0160 CVE-2019-0161 CVE-2019-11098  +12 more Upstream summary: Buffer overflow in network stack for EDK II may allow unprivileged user to potentially enable escalation […]

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Gentoo Linux — dev-db/mariadb — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Gentoo Linux

Gentoo Linux — dev-db/mariadb — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Gentoo Linux 📖 ~4 min read  •  Source: Gentoo GLSA GLSA-202011-14 Related CVEs: CVE-2020-15180 CVE-2019-2938 CVE-2019-2974 CVE-2021-46661 CVE-2021-46662 CVE-2021-46663 CVE-2021-46664 CVE-2021-46665  +12 more Upstream summary: It was discovered that MariaDB did not properly validate the content of a packet received from a […]

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Oracle Linux 8 — ruby:2.5 — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — ruby:2.5 — vulnerability — patch and remediation guide (ELSA-2022-5779)

🟡 Medium   ⏱ 10–30 min  Last verified: 16 September 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2022-5779 Related CVEs: CVE-2021-41819 CVE-2021-41817 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 — httpd:2.4 — security and stability fixes — required update — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — httpd:2.4 — security and stability fixes — required update (ELSA-2019-3436)

🟡 Medium   ⏱ 10–30 min  Last verified: 15 September 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2019-3436 Related CVEs: CVE-2019-0220 CVE-2019-0217 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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Debian 11 — bsd-mailx — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — bsd-mailx — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 15 September 2021 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2004-2771 CVE-2014-7844 Upstream summary: The expand function in fio.c in Heirloom mailx 12.5 and earlier and BSD mailx 8.1.2 and earlier allows remote attackers to execute arbitrary commands […]

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Debian 11 — calife — vulnerability — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — calife — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 15 September 2021 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2004-0188 Upstream summary: Heap-based buffer overflow in Calife 2.8.5 and earlier may allow local users to execute arbitrary code via a long password. Table of contents Symptom & […]

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Debian 11 — fast-cpp-csv-parser — vulnerability — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — fast-cpp-csv-parser — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 15 September 2021 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2018-13421 Upstream summary: Fast C++ CSV Parser (aka fast-cpp-csv-parser) before 2018-07-06 has a heap-based buffer over-read in io::trim_chars in csv.h. Table of contents Symptom & Impact Environment & […]

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Common Problems 117399

Ubuntu 20.04 apt lock errors during updates

🟡 Medium   ⏱ 5–30 min  Last verified: 15 September 2021 📖 ~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 11 — unrar-nonfree — multiple vulnerabilities (13 CVEs) — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — unrar-nonfree — multiple vulnerabilities (13 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 15 September 2021 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2007-0855 CVE-2007-3726 CVE-2012-6706 CVE-2017-12938 CVE-2017-12940 CVE-2017-12941 CVE-2017-12942 CVE-2017-20006  +5 more Upstream summary: Stack-based buffer overflow in RARLabs Unrar, as packaged in WinRAR and possibly other products, allows user-assisted […]

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