Ubuntu releases security updates for Linux kernel (Azure) to fix multiple vulnerabilities

Brief written by the FOSSWire AI editor from Ubuntu How we write

October 15, 2026 1 min read 43 reads

Key Takeaway

Multiple security vulnerabilities in the Linux kernel affecting Microsoft Azure systems have been patched in Ubuntu 16.04 LTS.

Summary

Ubuntu has released security updates for the linux-azure kernel package used in Microsoft Azure Cloud systems. The update addresses 11 CVEs across various subsystems, including networking, file systems, and hardware drivers. Due to an ABI change, users with third-party kernel modules must recompile and reinstall them.

Vulnerable subsystems and ABI changes

Affected subsystems: S390 architecture, IIO ADC drivers, PCI subsystem, VFIO drivers, NFS server daemon, Overlay file system, IPv6 networking, and Netfilter.
CVEs addressed: CVE-2024-53194, CVE-2024-53214, CVE-2024-56570, CVE-2024-56779, CVE-2024-57849, CVE-2024-57904, CVE-2024-57929, CVE-2025-21664, CVE-2025-38724, CVE-2026-53131, and CVE-2026-53221.
ABI Warning: An unavoidable ABI change requires manual recompilation of all third-party kernel modules.

Why it matters

Users running Ubuntu 16.04 LTS on Azure infrastructure must apply these updates and manage module recompilation to maintain system integrity and security.

Original reference: ubuntu.com →