# Multiple Linux kernel vulnerabilities in Ubuntu releases

Published: 2026-08-28 · Severity: routine
Canonical: https://vorant.io/reports/ebdbb5fc-92e0-52fe-b28c-a98c80364f44/multiple-linux-kernel-vulnerabilities-in-ubuntu-releases

> Multiple Ubuntu kernel vulnerabilities enable privilege escalation, data confidentiality and integrity breaches across versions 14.04 ESM through 26.04 LTS.

CERT-FR reports multiple vulnerabilities in the Linux kernel across multiple Ubuntu distributions. The affected versions span from Ubuntu 14.04 ESM through Ubuntu 26.04 LTS, including active LTS releases. These vulnerabilities enable attackers to achieve privilege escalation, compromise data confidentiality, and compromise data integrity. Ubuntu has released security patches across multiple bulletins (USN-8643 through USN-8669 series, and LSN-0121-1) addressing the issues across different kernel versions and release tracks. Defenders running any affected Ubuntu version should prioritize applying kernel updates from the referenced security notices.

## Mentioned in this report

- Vulnerabilities: CVE-2021-47378, CVE-2022-49803, CVE-2022-49961, CVE-2022-50073, CVE-2022-50116, CVE-2022-50552, CVE-2023-45896, CVE-2023-52682, CVE-2023-52737, CVE-2023-53545, CVE-2023-53596, CVE-2023-53629, CVE-2024-27389, CVE-2024-35865, CVE-2024-36898, CVE-2024-36922, CVE-2024-41079, CVE-2024-46715, CVE-2024-46770, CVE-2024-47809, CVE-2024-50012, CVE-2024-53221, CVE-2024-56557, CVE-2024-56584, CVE-2024-56657, CVE-2024-56719, CVE-2024-56727, CVE-2025-21712, CVE-2025-21739, CVE-2025-21863, CVE-2025-22107, CVE-2025-23141, CVE-2025-27558, CVE-2025-37786, CVE-2025-38006, CVE-2025-38105, CVE-2025-38192, CVE-2025-38250

Source reporting: https://www.cert.ssi.gouv.fr/avis/CERTFR-2026-AVI-1093

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