Package Management

Ubuntu 18.04 — log4net — vulnerability — patch and remediation guide — diagnosis and fix on Ubuntu 18.04

Ubuntu 18.04 — log4net — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-4699-1 Related CVEs: CVE-2018-1285 Upstream summary: It was discovered that Apache Log4net incorrectly handled certain configuration files. An attacker could possibly use this issue to expose sensitive information. Table of […]

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Ubuntu 20.04 — kvmtool — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 20.04

Ubuntu 20.04 — kvmtool — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-8172-1 Related CVEs: CVE-2023-2861 CVE-2021-45464 Upstream summary: It was discovered that kvmtool did not properly manage memory under certain circumstances. A malicious guest attacker could use this issue to cause […]

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Ubuntu 24.04 — wlc — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 24.04

Ubuntu 24.04 — wlc — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: Ubuntu 24.04 (noble) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-7981-1 Related CVEs: CVE-2026-22251 CVE-2026-22250 Upstream summary: It was discovered that wlc did not correctly handle SSL verification. An attacker could possibly use this issue to access sensitive resources. (CVE-2026-22250) […]

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Ubuntu 18.04 — mako — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 18.04

Ubuntu 18.04 — mako — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-8234-1 Related CVEs: CVE-2026-41205 CVE-2022-40023 Upstream summary: It was discovered that Mako incorrectly handled URIs with double-slash prefixes in TemplateLookup. A remote attacker could possibly use this issue to obtain […]

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Ubuntu 20.04 — pyjwt — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 20.04

Ubuntu 20.04 — pyjwt — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-8133-1 Related CVEs: CVE-2026-32597 CVE-2022-29217 Upstream summary: It was discovered that PyJWT did not validate the critical header parameter, contrary to the RFC specification expectations. A remote attacker could possibly […]

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Ubuntu 18.04 — libsass — multiple vulnerabilities (13 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 18.04

Ubuntu 18.04 — libsass — multiple vulnerabilities (13 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-4837-1 Related CVEs: CVE-2018-11499 CVE-2018-11693 CVE-2018-11695 CVE-2018-11696 CVE-2018-11697 CVE-2018-11698 CVE-2018-19797 CVE-2018-19827  +5 more Upstream summary: It was discovered that LibSass incorrectly handled certain specially crafted sass file. An attacker could […]

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Ubuntu 14.04 — jinja2 — multiple vulnerabilities (8 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 14.04

Ubuntu 14.04 — jinja2 — multiple vulnerabilities (8 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Ubuntu 14.04 (trusty) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-7343-1 Related CVEs: CVE-2024-56201 CVE-2024-56326 CVE-2025-27516 CVE-2024-34064 CVE-2020-28493 CVE-2024-22195 CVE-2016-10745 CVE-2019-10906 Upstream summary: Rafal Krupinski discovered that Jinja2 did not properly restrict the execution of code in situations where templates […]

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Ubuntu 18.04 — blueman — vulnerability — patch and remediation guide — diagnosis and fix on Ubuntu 18.04

Ubuntu 18.04 — blueman — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-4605-1 Related CVEs: CVE-2020-15238 Upstream summary: Vaisha Bernard discovered that blueman did not properly sanitize input on the d-bus interface to blueman-mechanism. A local attacker could possibly use this issue […]

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Ubuntu 18.04 — linux-oem — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 18.04

Ubuntu 18.04 — linux-oem — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-4660-1 Related CVEs: CVE-2020-14351 CVE-2020-14390 CVE-2020-25211 CVE-2020-25284 CVE-2020-25285 CVE-2020-25641 CVE-2020-25643 CVE-2020-25645  +12 more Upstream summary: It was discovered that a race condition existed in the perf subsystem of the Linux […]

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Ubuntu 14.04 — wayland — vulnerability — patch and remediation guide — diagnosis and fix on Ubuntu 14.04

Ubuntu 14.04 — wayland — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: Ubuntu 14.04 (trusty) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-3622-1 Related CVEs: CVE-2017-16612 Upstream summary: It was discovered that the Wayland Xcursor support incorrectly handled certain files. An attacker could use these issues to cause Wayland to crash, resulting […]

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