Several security issues were fixed in the Linux kernel.

Software Description:

- linux-azure: Linux kernel for Microsoft Azure Cloud systems

Details:

Several security issues were discovered in the Linux kernel.

An attacker could possibly use these to compromise the system.

This update corrects flaws in the following subsystems:

- S390 architecture;

- IIO ADC drivers;

- Multiple devices driver;

- PCI subsystem;

- VFIO drivers;

- Network file system (NFS) server daemon;

- Overlay file system;

- IPv6 networking;

- Netfilter;

(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, CVE-2026-53221)

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 16.04 LTS
  linux-image-4.15.0-1208-azure   4.15.0-1208.223~16.04.1
                                  Available with Ubuntu Pro
  linux-image-azure               4.15.0.1208.223~16.04.1
                                  Available with Ubuntu Pro

After a standard system update you need to reboot your computer to make
all the necessary changes.

ATTENTION: Due to an unavoidable ABI change the kernel updates have
been given a new version number, which requires you to recompile and
reinstall all third party kernel modules you might have installed.
Unless you manually uninstalled the standard kernel metapackages
(e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual,
linux-powerpc), a standard system upgrade will automatically perform
this as well.

https://ubuntu.com/security/notices/USN-8922-2

https://ubuntu.com/security/notices/USN-8922-1

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, CVE-2026-53221