[USN-7550-4] Linux kernel (Azure CVM) vulnerabilities

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Ubuntu Security Notice USN-7550-4
June 04, 2025

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

- Ubuntu 22.04 LTS

Summary:

Several security issues were fixed in the Linux kernel.

Software Description:
- linux-azure-fde: Linux kernel for Microsoft Azure CVM 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:
- GPU drivers;
- Sun RPC protocol;
(CVE-2024-53168, CVE-2024-56551, CVE-2024-56608)

Update instructions:

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

Ubuntu 22.04 LTS
linux-image-5.15.0-1090-azure-fde 5.15.0-1090.99.1
linux-image-azure-fde-lts-22.04 5.15.0.1090.99.67

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-7550-4
https://ubuntu.com/security/notices/USN-7550-3
https://ubuntu.com/security/notices/USN-7550-2
https://ubuntu.com/security/notices/USN-7550-1
CVE-2024-53168, CVE-2024-56551, CVE-2024-56608

Package Information:
https://launchpad.net/ubuntu/+source/linux-azure-fde/5.15.0-1090.99.1