Multiple Ubuntu Linux kernel vulnerabilities patched
Ubuntu issued patches for numerous Linux kernel flaws enabling code execution, privilege escalation, and denial of service across multiple releases.
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What to check
- Applies to
- The 39 CVEs named below. Whether you run an affected version is not assessed: check the versions the source lists.
- Exploitation
- No exploitation in the wild and no public exploit is recorded for the CVEs named.
CERT-FR published a security advisory on July 1–2, 2026 covering multiple vulnerabilities discovered in the Linux kernel underlying Ubuntu systems. The advisory identifies six affected Ubuntu releases: 14.04 ESM, 20.04 ESM, 22.04 LTS, 24.04 LTS, 25.10, and 26.04 LTS. The vulnerabilities span multiple impact categories including arbitrary code execution, privilege escalation, remote denial of service, data confidentiality breaches, security policy bypass, and other unspecified risks. Ubuntu released coordinated security updates across 11 distinct bulletins (USN-8488-1 through USN-8501-1, with follow-up patches USN-8488-2, USN-8492-2, and USN-8493-2). Defenders must prioritize patching all affected kernel versions, with particular urgency for code execution and privilege escalation flaws affecting current LTS releases. The advisory references over 150 individual CVEs spanning kernel development from 2022 through early 2026.
Mentioned in this report
Source reporting: https://www.cert.ssi.gouv.fr/avis/CERTFR-2026-AVI-0831
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