# Multiple Linux kernel vulnerabilities affect Ubuntu LTS releases

Published: 2026-07-31 · Severity: elevated
Canonical: https://vorant.io/reports/8fe38215-3a64-5bd3-a76e-653365e7ae9c/multiple-linux-kernel-vulnerabilities-affect-ubuntu-lts-releases

> Ubuntu kernel patches multiple vulnerabilities enabling privilege escalation, data breach, and integrity violations across 18.04 ESM through 26.04 LTS.

CERT-FR has published an advisory documenting multiple vulnerabilities discovered in the Linux kernel used across multiple Ubuntu distributions. The affected versions span Ubuntu 18.04 ESM, 20.04 ESM, 22.04 LTS, 24.04 LTS, and 26.04 LTS. These vulnerabilities enable attackers to achieve privilege escalation, compromise data confidentiality, violate data integrity, and bypass security policies.

Ubuntu has released coordinated security updates across 24 separate USN (Ubuntu Security Notice) bulletins published between 24–29 July 2026, addressing over 200 distinct CVEs in the kernel. The kernel vulnerabilities span CVE identifiers from 2022 through early 2026, indicating a backport patching effort across multiple kernel versions and flavors maintained by Canonical.

Defenders must prioritize patching kernel updates on all affected Ubuntu LTS systems. The advisory directs administrators to Ubuntu's official security bulletins for each release, which contain specific CVE identifications, affected kernel versions, and patch guidance. No indication of in-the-wild exploitation is stated in the advisory itself.

## Mentioned in this report

- Vulnerabilities: CVE-2022-48816, 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-2023-53673, 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-2025-21709, CVE-2025-21712, CVE-2025-21739, CVE-2025-21863, CVE-2025-22107, CVE-2025-22116, CVE-2025-23141, CVE-2025-37778, CVE-2025-37786, CVE-2025-37822, CVE-2025-37924, CVE-2025-38006

Source reporting: https://www.cert.ssi.gouv.fr/avis/CERTFR-2026-AVI-0954

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