[USN-7462-1] Linux kernel vulnerabilities

==========================================================================
Ubuntu Security Notice USN-7462-1
April 24, 2025

linux-aws, linux-aws-5.4, linux-gcp-5.4, linux-iot 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-aws: Linux kernel for Amazon Web Services (AWS) systems
- linux-iot: Linux kernel for IoT platforms
- linux-aws-5.4: Linux kernel for Amazon Web Services (AWS) systems
- linux-gcp-5.4: Linux kernel for Google Cloud Platform (GCP) 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;
- Network drivers;
- File systems infrastructure;
- Ext4 file system;
- Network file system (NFS) server daemon;
- SMB network file system;
- Network namespace;
- Bluetooth subsystem;
- Networking core;
- IPv6 networking;
- Network traffic control;
(CVE-2024-56658, CVE-2025-21700, CVE-2025-21703, CVE-2024-35864,
CVE-2024-26915, CVE-2021-47119, CVE-2025-21702, CVE-2024-50256,
CVE-2024-35958, CVE-2024-26928, CVE-2024-49974, CVE-2024-46826,
CVE-2024-53237, CVE-2024-56651)

Update instructions:

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

Ubuntu 20.04 LTS
linux-image-5.4.0-1049-iot 5.4.0-1049.52
linux-image-5.4.0-1144-aws 5.4.0-1144.154
linux-image-aws-lts-20.04 5.4.0.1144.141

Ubuntu 18.04 LTS
linux-image-5.4.0-1144-aws 5.4.0-1144.154~18.04.1
Available with Ubuntu Pro
linux-image-5.4.0-1147-gcp 5.4.0-1147.156~18.04.1
Available with Ubuntu Pro
linux-image-aws 5.4.0.1144.154~18.04.1
Available with Ubuntu Pro
linux-image-gcp 5.4.0.1147.156~18.04.1
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-7462-1
CVE-2021-47119, CVE-2024-26915, CVE-2024-26928, CVE-2024-35864,
CVE-2024-35958, CVE-2024-46826, CVE-2024-49974, CVE-2024-50256,
CVE-2024-53237, CVE-2024-56651, CVE-2024-56658, CVE-2025-21700,
CVE-2025-21702, CVE-2025-21703

Package Information:
https://launchpad.net/ubuntu/+source/linux-aws/5.4.0-1144.154
https://launchpad.net/ubuntu/+source/linux-iot/5.4.0-1049.52