Common Problems

Debian 11 — xml-security-c — multiple vulnerabilities (7 CVEs) — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — xml-security-c — multiple vulnerabilities (7 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 1 December 2021 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2009-0217 CVE-2011-2516 CVE-2013-2153 CVE-2013-2154 CVE-2013-2155 CVE-2013-2156 CVE-2013-2210 Upstream summary: The design of the W3C XML Signature Syntax and Processing (XMLDsig) recommendation, as implemented in products including (1) the […]

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AlmaLinux 8 — drpm — vulnerability — patch and remediation guide — diagnosis and fix on AlmaLinux 8

AlmaLinux 8 — drpm — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: AlmaLinux 8 📖 ~4 min read  •  Source: AlmaLinux ALSA ALEA-2020:4700 Upstream summary: For detailed information on changes in this release, see the AlmaLinux Release Notes linked from the References section. Table of contents Symptom & Impact Environment & Reproduction Root Cause […]

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Debian 10 — libx11 — vulnerability — patch and remediation guide — diagnosis and fix on Debian 10

Debian 10 — libx11 — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 1 December 2021 Affected versions: Debian 10 (buster) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2021-31535 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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Debian 11 — rustc — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Debian 11

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

🟠 High   ⏱ 15–60 min  Last verified: 1 December 2021 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2015-20001 CVE-2017-20004 CVE-2018-1000622 CVE-2018-1000657 CVE-2018-1000810 CVE-2018-25008 CVE-2019-1010299 CVE-2020-36317  +12 more Upstream summary: In the standard library in Rust before 1.2.0, BinaryHeap is not panic-safe. The binary heap is […]

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Debian 11 — ruby-json-jwt — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — ruby-json-jwt — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 1 December 2021 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2018-1000539 CVE-2019-18848 Upstream summary: Nov json-jwt version >= 0.5.0 && < 1.9.4 contains a CWE-347: Improper Verification of Cryptographic Signature vulnerability in Decryption of AES-GCM encrypted JSON Web […]

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Debian 11 — ibus-chewing — vulnerability — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — ibus-chewing — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 1 December 2021 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2013-4509 Upstream summary: The default configuration of IBUS 1.5.4, and possibly 1.5.2 and earlier, when IBus.InputPurpose.PASSWORD is not set and used with GNOME 3, does not obscure the […]

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Debian 11 — lua-expat — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — lua-expat — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 1 December 2021 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2011-2188 CVE-2014-2744 Upstream summary: LuaExpat before 1.2.0 does not properly detect recursion during entity expansion, which allows remote attackers to cause a denial of service (memory and CPU […]

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Ubuntu 18.04 — grub2-unsigned — multiple vulnerabilities (7 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 18.04

Ubuntu 18.04 — grub2-unsigned — multiple vulnerabilities (7 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 1 December 2021 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-4992-1 Related CVEs: CVE-2020-14372 CVE-2020-25632 CVE-2020-27749 CVE-2020-27779 CVE-2021-20225 CVE-2021-20233 https://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/GRUB2SecureBootBypass2021 Upstream summary: Máté Kukri discovered that the acpi command in GRUB 2 allowed privileged users to load crafted ACPI tables […]

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Oracle Linux 8 — sudo — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — sudo — vulnerability — patch and remediation guide (ELSA-2021-0218)

🟠 High   ⏱ 15–60 min  Last verified: 1 December 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2021-0218 Related CVEs: CVE-2021-3156 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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Debian 11 — wpa — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Debian 11

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

🟠 High   ⏱ 15–60 min  Last verified: 1 December 2021 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2012-4445 CVE-2014-3686 CVE-2015-1863 CVE-2015-4141 CVE-2015-4142 CVE-2015-4143 CVE-2015-4144 CVE-2015-4145  +12 more Upstream summary: Heap-based buffer overflow in the eap_server_tls_process_fragment function in eap_server_tls_common.c in the EAP authentication server in hostapd […]

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