[USN-7461-1] Linux kernel vulnerabilities

==========================================================================
Ubuntu Security Notice USN-7461-1
April 24, 2025

linux, linux-azure, linux-azure-5.4, linux-bluefield, linux-gcp,
linux-hwe-5.4, linux-ibm, linux-kvm, linux-oracle, linux-oracle-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: Linux kernel
- linux-azure: Linux kernel for Microsoft Azure Cloud systems
- linux-bluefield: Linux kernel for NVIDIA BlueField platforms
- linux-gcp: Linux kernel for Google Cloud Platform (GCP) systems
- linux-ibm: Linux kernel for IBM cloud systems
- linux-kvm: Linux kernel for cloud environments
- linux-oracle: Linux kernel for Oracle Cloud systems
- linux-azure-5.4: Linux kernel for Microsoft Azure cloud systems
- linux-hwe-5.4: Linux hardware enablement (HWE) kernel
- linux-oracle-5.4: Linux kernel for Oracle 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;
- Network drivers;
- File systems infrastructure;
- Ext4 file system;
- Network file system (NFS) server daemon;
- Bluetooth subsystem;
- IPv6 networking;
- Network traffic control;
(CVE-2024-53237, CVE-2024-50256, CVE-2021-47119, CVE-2024-35958,
CVE-2025-21700, CVE-2025-21703, CVE-2024-56651, CVE-2024-49974,
CVE-2025-21702, CVE-2024-26915, CVE-2024-46826)

Update instructions:

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

Ubuntu 20.04 LTS
linux-image-5.4.0-1090-ibm 5.4.0-1090.95
linux-image-5.4.0-1103-bluefield 5.4.0-1103.110
linux-image-5.4.0-1131-kvm 5.4.0-1131.140
linux-image-5.4.0-1142-oracle 5.4.0-1142.152
linux-image-5.4.0-1147-gcp 5.4.0-1147.156
linux-image-5.4.0-1149-azure 5.4.0-1149.156
linux-image-5.4.0-214-generic 5.4.0-214.234
linux-image-5.4.0-214-generic-lpae 5.4.0-214.234
linux-image-5.4.0-214-lowlatency 5.4.0-214.234
linux-image-azure-lts-20.04 5.4.0.1149.143
linux-image-bluefield 5.4.0.1103.99
linux-image-gcp-lts-20.04 5.4.0.1147.149
linux-image-generic 5.4.0.214.207
linux-image-generic-lpae 5.4.0.214.207
linux-image-ibm-lts-20.04 5.4.0.1090.119
linux-image-kvm 5.4.0.1131.127
linux-image-lowlatency 5.4.0.214.207
linux-image-oem 5.4.0.214.207
linux-image-oem-osp1 5.4.0.214.207
linux-image-oracle-lts-20.04 5.4.0.1142.136
linux-image-virtual 5.4.0.214.207

Ubuntu 18.04 LTS
linux-image-5.4.0-1142-oracle 5.4.0-1142.152~18.04.1
Available with Ubuntu Pro
linux-image-5.4.0-1149-azure 5.4.0-1149.156~18.04.1
Available with Ubuntu Pro
linux-image-5.4.0-214-generic 5.4.0-214.234~18.04.1
Available with Ubuntu Pro
linux-image-5.4.0-214-lowlatency 5.4.0-214.234~18.04.1
Available with Ubuntu Pro
linux-image-azure 5.4.0.1149.156~18.04.1
Available with Ubuntu Pro
linux-image-generic-hwe-18.04 5.4.0.214.234~18.04.1
Available with Ubuntu Pro
linux-image-lowlatency-hwe-18.04 5.4.0.214.234~18.04.1
Available with Ubuntu Pro
linux-image-oem 5.4.0.214.234~18.04.1
Available with Ubuntu Pro
linux-image-oem-osp1 5.4.0.214.234~18.04.1
Available with Ubuntu Pro
linux-image-oracle 5.4.0.1142.152~18.04.1
Available with Ubuntu Pro
linux-image-snapdragon-hwe-18.04 5.4.0.214.234~18.04.1
Available with Ubuntu Pro
linux-image-virtual-hwe-18.04 5.4.0.214.234~18.04.1
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-7461-1
CVE-2021-47119, CVE-2024-26915, CVE-2024-35958, CVE-2024-46826,
CVE-2024-49974, CVE-2024-50256, CVE-2024-53237, CVE-2024-56651,
CVE-2025-21700, CVE-2025-21702, CVE-2025-21703

Package Information:
https://launchpad.net/ubuntu/+source/linux/5.4.0-214.234
https://launchpad.net/ubuntu/+source/linux-azure/5.4.0-1149.156
https://launchpad.net/ubuntu/+source/linux-bluefield/5.4.0-1103.110
https://launchpad.net/ubuntu/+source/linux-gcp/5.4.0-1147.156
https://launchpad.net/ubuntu/+source/linux-ibm/5.4.0-1090.95
https://launchpad.net/ubuntu/+source/linux-kvm/5.4.0-1131.140
https://launchpad.net/ubuntu/+source/linux-oracle/5.4.0-1142.152