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Ubuntu Security Notice USN-7499-1
May 07, 2025

linux-azure, linux-azure-6.11 vulnerabilities
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 24.10
- Ubuntu 24.04 LTS

Summary:

Several security issues were fixed in the Linux kernel.

Software Description:
- linux-azure: Linux kernel for Microsoft Azure Cloud systems
- linux-azure-6.11: 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:
  - Microsoft Azure Network Adapter (MANA) driver;
  - Timer subsystem;
(CVE-2025-21813, CVE-2025-21953)

Update instructions:

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

Ubuntu 24.10
  linux-image-6.11.0-1014-azure   6.11.0-1014.14
  linux-image-6.11.0-1014-azure-fde  6.11.0-1014.14
  linux-image-azure               6.11.0-1014.14
  linux-image-azure-fde           6.11.0-1014.14

Ubuntu 24.04 LTS
  linux-image-6.11.0-1014-azure   6.11.0-1014.14~24.04.1
  linux-image-6.11.0-1014-azure-fde  6.11.0-1014.14~24.04.1
  linux-image-azure               6.11.0-1014.14~24.04.1
  linux-image-azure-fde           6.11.0-1014.14~24.04.1

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.

References:
  https://ubuntu.com/security/notices/USN-7499-1
  CVE-2025-21813, CVE-2025-21953

Package Information:
  https://launchpad.net/ubuntu/+source/linux-azure/6.11.0-1014.14
  https://launchpad.net/ubuntu/+source/linux-azure-6.11/6.11.0-1014.14~24.04.1