Ubuntu 20.04

Ubuntu 20.04 — protobuf — multiple vulnerabilities (5 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 20.04

Ubuntu 20.04 — protobuf — multiple vulnerabilities (5 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 12 July 2026 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-7629-2 Related CVEs: CVE-2025-4565 CVE-2024-7254 CVE-2021-22569 CVE-2021-22570 CVE-2022-1941 Upstream summary: USN-7435-1 and USN-7629-1 fixed vulnerabilities in Protocol Buffers for several releases of Ubuntu. This update provides the corresponding fixes for […]

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Ubuntu 20.04 — lua5.1 — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 20.04

Ubuntu 20.04 — lua5.1 — multiple vulnerabilities (3 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 12 July 2026 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-8169-1 Related CVEs: CVE-2025-49844 CVE-2022-24834 CVE-2024-31449 Upstream summary: It was discovered that Redis incorrectly handled certain specially crafted Lua scripts. A remote attacker could possibly use this issue to cause […]

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Ubuntu 20.04 — lua-cjson — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 20.04

Ubuntu 20.04 — lua-cjson — multiple vulnerabilities (3 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 8 July 2026 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-8169-1 Related CVEs: CVE-2025-49844 CVE-2022-24834 CVE-2024-31449 Upstream summary: It was discovered that Redis incorrectly handled certain specially crafted Lua scripts. A remote attacker could possibly use this issue to cause […]

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Ubuntu 20.04 — libxmltok — multiple vulnerabilities (19 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 20.04

Ubuntu 20.04 — libxmltok — multiple vulnerabilities (19 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 7 July 2026 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-8023-1 Related CVEs: CVE-2026-25210 CVE-2026-24515 CVE-2012-1148 CVE-2015-1283 CVE-2016-0718 CVE-2016-4472 CVE-2018-20843 CVE-2019-15903  +11 more Upstream summary: It was discovered that Expat, contained within the xmltok library, incorrectly handled the initialization of […]

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Ubuntu 20.04 — dnsmasq — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 20.04

Ubuntu 20.04 — dnsmasq — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 5 July 2026 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-8268-1 Related CVEs: CVE-2026-4890 CVE-2026-4891 CVE-2026-2291 CVE-2026-4892 CVE-2026-5172 CVE-2026-4893 CVE-2023-28450 CVE-2023-50387  +12 more Upstream summary: Andrew S. Fasano, Royce M, and Hugo Martinez Ray discovered that Dnsmasq did not allocate […]

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Ubuntu 20.04 — avahi — multiple vulnerabilities (13 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 20.04

Ubuntu 20.04 — avahi — multiple vulnerabilities (13 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 3 July 2026 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-8269-1 Related CVEs: CVE-2026-24401 CVE-2026-34933 CVE-2025-68276 CVE-2025-68468 CVE-2025-68471 CVE-2023-38469 CVE-2023-38470 CVE-2023-38471  +5 more Upstream summary: It is discovered that Avahi incorrectly handled crafted input. A remote attacker could possibly use […]

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Ubuntu 20.04 — openjdk-8 — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 20.04

Ubuntu 20.04 — openjdk-8 — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 1 July 2026 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-8000-1 Related CVEs: CVE-2026-21932 CVE-2026-21925 CVE-2026-21933 CVE-2026-21945 CVE-2025-53057 CVE-2025-53066 CVE-2025-30749 CVE-2025-30761  +12 more Upstream summary: It was discovered that the RMI component of OpenJDK 8 would establish RMI TCP endpoint […]

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Ubuntu 20.04 — nltk — multiple vulnerabilities (4 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 20.04

Ubuntu 20.04 — nltk — multiple vulnerabilities (4 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 29 June 2026 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-8214-1 Related CVEs: CVE-2025-14009 CVE-2021-3842 CVE-2021-43854 CVE-2021-3828 Upstream summary: It was discovered that NLTK incorrectly handled file extraction when opening a maliciously crafted zip file. An attacker could possibly use […]

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Ubuntu 20.04 — linux-gcp-fips — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 20.04

Ubuntu 20.04 — linux-gcp-fips — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 24 June 2026 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-8273-1 Related CVEs: CVE-2024-50304 CVE-2026-23112 CVE-2026-23209 CVE-2026-31431 CVE-2026-31504 CVE-2026-31533 CVE-2026-43033 CVE-2026-43077  +12 more Upstream summary: Several security issues were discovered in the Linux kernel. An attacker could possibly use these […]

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Ubuntu 20.04 — linux-azure-fips — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 20.04

Ubuntu 20.04 — linux-azure-fips — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 21 June 2026 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-8280-2 Related CVEs: CVE-2026-31431 CVE-2026-31504 CVE-2026-31533 CVE-2026-43033 CVE-2026-43077 CVE-2026-43078 CVE-2024-50304 CVE-2026-23112  +12 more Upstream summary: It was discovered that the Linux kernel algif_aead module did not properly handle in-place cryptographic […]

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