Multiple Linux kernel vulnerabilities affect Ubuntu systems
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Ubuntu Linux kernel contains multiple vulnerabilities enabling privilege escalation, denial of service, and data confidentiality breaches across all active releases.
CERT-FR has published a security advisory covering multiple vulnerabilities discovered in the Linux kernel used by Ubuntu systems. The affected versions span Ubuntu 18.04 ESM, 20.04 ESM, 22.04 LTS, 24.04 LTS, and 25.10. These vulnerabilities can be exploited to achieve privilege escalation, remote denial of service, and compromise data confidentiality. Ubuntu has released kernel patches across multiple security bulletins (USN-8277-2 through USN-8310-1) addressing the issues. Defenders running any of these Ubuntu versions should prioritize applying kernel updates to their deployments.
Mentioned in this report
Source reporting: https://www.cert.ssi.gouv.fr/avis/CERTFR-2026-AVI-0663
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