# Ubuntu Linux kernel multiple vulnerabilities patches

Published: 2026-08-21 · Severity: routine
Canonical: https://vorant.io/reports/abd351aa-a18a-58ac-b72b-65c4b0cf7dc6/ubuntu-linux-kernel-multiple-vulnerabilities-patches

> Multiple Linux kernel vulnerabilities affecting Ubuntu 14.04 through 26.04 enable privilege escalation, data breach, and integrity compromise.

CERT-FR has published a security advisory detailing multiple vulnerabilities discovered in the Linux kernel used by Ubuntu across versions 14.04 ESM through 26.04 LTS. These vulnerabilities enable attackers to achieve privilege escalation, compromise data confidentiality, and violate data integrity. The affected versions span from extended security maintenance releases to current long-term support and latest releases, indicating a broad and significant impact across Ubuntu deployments. Ubuntu has released coordinated patches across multiple security bulletins (USN-8629 through USN-8666 series) issued between 17 and 20 August 2026. Organizations running any of these Ubuntu versions must prioritize applying the corresponding kernel updates from their distribution channel to mitigate privilege escalation and data compromise risks.

## Mentioned in this report

- Vulnerabilities: CVE-2021-47354, CVE-2021-47378, CVE-2024-38612, CVE-2025-21709, CVE-2025-22116, CVE-2025-27558, CVE-2025-38426, CVE-2025-39764, CVE-2025-40135, CVE-2025-40150, CVE-2025-54505, CVE-2025-54518, CVE-2025-62626, CVE-2025-68175, CVE-2025-68239, CVE-2025-68334, CVE-2025-68736, CVE-2025-71152, CVE-2025-71161, CVE-2025-71203, CVE-2025-71221, CVE-2025-71269, CVE-2025-71287, CVE-2025-71288, CVE-2026-22981, CVE-2026-22985, CVE-2026-22993, CVE-2026-23004, CVE-2026-23066, CVE-2026-23104, CVE-2026-23118, CVE-2026-23138, CVE-2026-23154, CVE-2026-23157, CVE-2026-23171, CVE-2026-23207, CVE-2026-23226, CVE-2026-23227, CVE-2026-23244, CVE-2026-23245

Source reporting: https://www.cert.ssi.gouv.fr/avis/CERTFR-2026-AVI-1066

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