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Ubuntu 18.04 — gss-ntlmssp — multiple vulnerabilities (4 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 18.04

Ubuntu 18.04 — gss-ntlmssp — multiple vulnerabilities (4 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-7588-1 Related CVEs: CVE-2023-25567 CVE-2023-25565 CVE-2023-25564 CVE-2023-25563 Upstream summary: Phil Turnbull discovered that GSS NTLMSSP may perform out-of-bounds reads when decoding NTLM fields and target information. An attacker could possibly […]

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Ubuntu 22.04 — flatpak — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 22.04

Ubuntu 22.04 — flatpak — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: Ubuntu 22.04 (jammy) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-7046-1 Related CVEs: CVE-2024-42472 https://launchpad.net/bugs/2077087 Upstream summary: It was discovered that Flatpak incorrectly handled certain persisted directories. An attacker could possibly use this issue to read and write files in […]

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Ubuntu 16.04 — phpseclib — multiple vulnerabilities (4 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 16.04

Ubuntu 16.04 — phpseclib — multiple vulnerabilities (4 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Ubuntu 16.04 (xenial) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-7404-1 Related CVEs: CVE-2021-30130 CVE-2023-52892 CVE-2024-27354 CVE-2024-27355 Upstream summary: It was discovered that phpseclib did not correctly handle RSA PKCS#1 v1.5 signature verification. An attacker could possibly use this issue […]

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

Ubuntu 18.04 — kopanocore — 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-6876-1 Related CVEs: CVE-2019-19907 CVE-2022-26562 Upstream summary: It was discovered that Kopano Core allowed out-of-bounds access. An attacker could use this issue to expose private information. This issue only affected […]

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

Ubuntu 24.04 — uriparser — 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-7356-1 Related CVEs: CVE-2024-34402 CVE-2024-34403 Upstream summary: It was discovered that uriparser did not correctly handle certain inputs, which could lead to an integer overflow. An attacker could possibly use […]

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Ubuntu 20.04 — gst-plugins-bad1.0 — multiple vulnerabilities (9 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 20.04

Ubuntu 20.04 — gst-plugins-bad1.0 — multiple vulnerabilities (9 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-7558-1 Related CVEs: CVE-2023-50186 CVE-2024-0444 CVE-2025-3887 CVE-2023-37329 CVE-2023-40474 CVE-2023-40475 CVE-2023-40476 CVE-2023-44429  +1 more Upstream summary: It was discovered that the AV1 codec plugin in GStreamer could be made to write […]

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Ubuntu 14.04 — sympa — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 14.04

Ubuntu 14.04 — sympa — multiple vulnerabilities (3 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-4442-1 Related CVEs: CVE-2018-1000550 CVE-2018-1000671 CVE-2020-10936 Upstream summary: Michael Kaczmarczik discovered that Sympa incorrectly handled HTTP GET/POST requests. An attacker could possibly use this issue to insert, edit or obtain […]

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Ubuntu 20.04 — ruby-devise-two-factor — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 20.04

Ubuntu 20.04 — ruby-devise-two-factor — 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-7050-1 Related CVEs: CVE-2021-43177 CVE-2024-8796 Upstream summary: Benoit Côté-Jodoin and Michael Nipper discovered that Devise-Two-Factor incorrectly handled one-time password validation. An attacker could possibly use this issue to intercept and […]

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Ubuntu 20.04 — fwupd — vulnerability — patch and remediation guide — diagnosis and fix on Ubuntu 20.04

Ubuntu 20.04 — fwupd — vulnerability — 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-4395-1 Related CVEs: CVE-2020-10759 Upstream summary: Justin Steven discovered that fwupd incorrectly handled certain signature verification. An attacker could possibly use this issue to install an unsigned firmware. Table of […]

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

Ubuntu 18.04 — walinuxagent — 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-3907-1 Related CVEs: CVE-2019-0804 Upstream summary: It was discovered that WALinuxAgent created swap files with incorrect permissions. A local attacker could possibly use this issue to obtain sensitive information from […]

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