[USN-7671-2] Linux kernel vulnerabilities

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==========================================================================
Ubuntu Security Notice USN-7671-2
July 29, 2025

linux-azure, linux-azure-5.4, linux-azure-fips, linux-raspi,
linux-raspi-5.4 vulnerabilities
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS

Summary:

Several security issues were fixed in the Linux kernel.

Software Description:
- linux-azure: Linux kernel for Microsoft Azure Cloud systems
- linux-azure-fips: Linux kernel for Microsoft Azure Cloud systems with FIPS
- linux-raspi: Linux kernel for Raspberry Pi systems
- linux-azure-5.4: Linux kernel for Microsoft Azure cloud systems
- linux-raspi-5.4: Linux kernel for Raspberry Pi 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:
- ACPI drivers;
- GPU drivers;
- SMB network file system;
- Memory management;
- Netfilter;
- Network traffic control;
(CVE-2024-53051, CVE-2024-46787, CVE-2024-50047, CVE-2024-56662,
CVE-2025-37890, CVE-2025-38001, CVE-2025-37997, CVE-2025-37932,
CVE-2025-37798, CVE-2025-38177, CVE-2025-38000)

Update instructions:

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

Ubuntu 20.04 LTS
linux-image-5.4.0-1131-raspi 5.4.0-1131.144
Available with Ubuntu Pro
linux-image-5.4.0-1153-azure 5.4.0-1153.160
Available with Ubuntu Pro
linux-image-5.4.0-1154-azure-fips 5.4.0-1154.161+fips1
Available with Ubuntu Pro
linux-image-azure-5.4 5.4.0.1153.147
Available with Ubuntu Pro
linux-image-azure-fips 5.4.0.1154.91
Available with Ubuntu Pro
linux-image-azure-fips-5.4 5.4.0.1154.91
Available with Ubuntu Pro
linux-image-azure-lts-20.04 5.4.0.1153.147
Available with Ubuntu Pro
linux-image-raspi 5.4.0.1131.162
Available with Ubuntu Pro
linux-image-raspi-5.4 5.4.0.1131.162
Available with Ubuntu Pro
linux-image-raspi2 5.4.0.1131.162
Available with Ubuntu Pro

Ubuntu 18.04 LTS
linux-image-5.4.0-1131-raspi 5.4.0-1131.144~18.04.1
Available with Ubuntu Pro
linux-image-5.4.0-1153-azure 5.4.0-1153.160~18.04.1
Available with Ubuntu Pro
linux-image-azure 5.4.0.1153.160~18.04.1
Available with Ubuntu Pro
linux-image-azure-5.4 5.4.0.1153.160~18.04.1
Available with Ubuntu Pro
linux-image-raspi-5.4 5.4.0.1131.144~18.04.1
Available with Ubuntu Pro
linux-image-raspi-hwe-18.04 5.4.0.1131.144~18.04.1
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.

References:
https://ubuntu.com/security/notices/USN-7671-2
https://ubuntu.com/security/notices/USN-7671-1
CVE-2024-46787, CVE-2024-50047, CVE-2024-53051, CVE-2024-56662,
CVE-2025-37798, CVE-2025-37890, CVE-2025-37932, CVE-2025-37997,
CVE-2025-38000, CVE-2025-38001, CVE-2025-38177