Multiple vulnerabilities have been identified in the Linux kernel used by Ubuntu. The issues, reported in a series of Ubuntu Security Notices (USN‑8277‑2 through USN‑8310‑1), affect Ubuntu 18.04 ESM, 20.04 ESM, 22.04 LTS, 24.04 LTS, and 25.10. The flaws can allow an attacker to gain elevated privileges, trigger a remote denial‑of‑service, or compromise data confidentiality. Ubuntu has issued patch updates for each affected release. Users are advised to review the corresponding USN notices and apply the available fixes. The National Cybersecurity Agency has documented the vulnerabilities and provided links to the official notices for further details. These security advisories were released on 22, 25, and 26 May 2026, and the advisory references multiple CVE identifiers, including CVE‑2023‑2640 and CVE‑2026‑22976. System administrators should verify that their systems have applied the latest kernel patches to mitigate these risks.
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