[USN-7921-1] Linux kernel vulnerabilities

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==========================================================================
Ubuntu Security Notice USN-7921-1
December 10, 2025

linux, linux-aws, linux-aws-6.14, linux-gcp, linux-hwe-6.14, linux-raspi
vulnerabilities
==========================================================================

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

- Ubuntu 25.04
- Ubuntu 24.04 LTS

Summary:

Several security issues were fixed in the Linux kernel.

Software Description:
- linux: Linux kernel
- linux-aws: Linux kernel for Amazon Web Services (AWS) systems
- linux-gcp: Linux kernel for Google Cloud Platform (GCP) systems
- linux-raspi: Linux kernel for Raspberry Pi systems
- linux-aws-6.14: Linux kernel for Amazon Web Services (AWS) systems
- linux-hwe-6.14: Linux hardware enablement (HWE) kernel

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:
- Cryptographic API;
- Media drivers;
- Netfilter;
- TLS protocol;
(CVE-2025-39946, CVE-2025-39964, CVE-2025-39993, CVE-2025-40018)

Update instructions:

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

Ubuntu 25.04
linux-image-6.14.0-1018-aws 6.14.0-1018.18
linux-image-6.14.0-1018-aws-64k 6.14.0-1018.18
linux-image-6.14.0-1019-raspi 6.14.0-1019.19
linux-image-6.14.0-1021-gcp 6.14.0-1021.22
linux-image-6.14.0-1021-gcp-64k 6.14.0-1021.22
linux-image-6.14.0-37-generic 6.14.0-37.37
linux-image-6.14.0-37-generic-64k 6.14.0-37.37
linux-image-aws 6.14.0-1018.18
linux-image-aws-6.14 6.14.0-1018.18
linux-image-aws-64k 6.14.0-1018.18
linux-image-aws-64k-6.14 6.14.0-1018.18
linux-image-gcp 6.14.0-1021.22
linux-image-gcp-6.14 6.14.0-1021.22
linux-image-gcp-64k 6.14.0-1021.22
linux-image-gcp-64k-6.14 6.14.0-1021.22
linux-image-generic 6.14.0-37.37
linux-image-generic-6.14 6.14.0-37.37
linux-image-generic-64k 6.14.0-37.37
linux-image-generic-64k-6.14 6.14.0-37.37
linux-image-raspi 6.14.0-1019.19
linux-image-raspi-6.14 6.14.0-1019.19
linux-image-virtual 6.14.0-37.37
linux-image-virtual-6.14 6.14.0-37.37

Ubuntu 24.04 LTS
linux-image-6.14.0-1018-aws 6.14.0-1018.18~24.04.1
linux-image-6.14.0-1018-aws-64k 6.14.0-1018.18~24.04.1
linux-image-6.14.0-37-generic 6.14.0-37.37~24.04.1
linux-image-6.14.0-37-generic-64k 6.14.0-37.37~24.04.1
linux-image-aws 6.14.0-1018.18~24.04.1
linux-image-aws-6.14 6.14.0-1018.18~24.04.1
linux-image-aws-64k 6.14.0-1018.18~24.04.1
linux-image-aws-64k-6.14 6.14.0-1018.18~24.04.1
linux-image-generic-6.14 6.14.0-37.37~24.04.1
linux-image-generic-64k-6.14 6.14.0-37.37~24.04.1
linux-image-generic-64k-hwe-24.04 6.14.0-37.37~24.04.1
linux-image-generic-hwe-24.04 6.14.0-37.37~24.04.1
linux-image-virtual-6.14 6.14.0-37.37~24.04.1
linux-image-virtual-hwe-24.04 6.14.0-37.37~24.04.1

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-7921-1
CVE-2025-39946, CVE-2025-39964, CVE-2025-39993, CVE-2025-40018

Package Information:
https://launchpad.net/ubuntu/+source/linux/6.14.0-37.37
https://launchpad.net/ubuntu/+source/linux-aws/6.14.0-1018.18
https://launchpad.net/ubuntu/+source/linux-gcp/6.14.0-1021.22
https://launchpad.net/ubuntu/+source/linux-raspi/6.14.0-1019.19
https://launchpad.net/ubuntu/+source/linux-aws-6.14/6.14.0-1018.18~24.04.1
https://launchpad.net/ubuntu/+source/linux-hwe-6.14/6.14.0-37.37~24.04.1