[USN-7889-6] Linux kernel vulnerabilities

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==========================================================================
Ubuntu Security Notice USN-7889-6
December 11, 2025

linux-hwe-6.8, linux-oracle-6.8 vulnerabilities
==========================================================================

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-hwe-6.8: Linux hardware enablement (HWE) kernel
- linux-oracle-6.8: 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:
- Media drivers;
- Network drivers;
- Netfilter;
- TLS protocol;
(CVE-2025-21729, CVE-2025-38227, CVE-2025-38616, CVE-2025-38678)

Update instructions:

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

Ubuntu 22.04 LTS
linux-image-6.8.0-1040-oracle 6.8.0-1040.41~22.04.1
linux-image-6.8.0-1040-oracle-64k 6.8.0-1040.41~22.04.1
linux-image-6.8.0-88-generic 6.8.0-88.89~22.04.2
linux-image-6.8.0-88-generic-64k 6.8.0-88.89~22.04.2
linux-image-generic-6.8 6.8.0-88.89~22.04.2
linux-image-generic-64k-6.8 6.8.0-88.89~22.04.2
linux-image-generic-64k-hwe-22.04 6.8.0-88.89~22.04.2
linux-image-generic-hwe-22.04 6.8.0-88.89~22.04.2
linux-image-oem-22.04 6.8.0-88.89~22.04.2
linux-image-oem-22.04a 6.8.0-88.89~22.04.2
linux-image-oem-22.04b 6.8.0-88.89~22.04.2
linux-image-oem-22.04c 6.8.0-88.89~22.04.2
linux-image-oem-22.04d 6.8.0-88.89~22.04.2
linux-image-oracle 6.8.0-1040.41~22.04.1
linux-image-oracle-6.8 6.8.0-1040.41~22.04.1
linux-image-oracle-64k 6.8.0-1040.41~22.04.1
linux-image-oracle-64k-6.8 6.8.0-1040.41~22.04.1
linux-image-virtual-6.8 6.8.0-88.89~22.04.2
linux-image-virtual-hwe-22.04 6.8.0-88.89~22.04.2

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-7889-6
https://ubuntu.com/security/notices/USN-7889-5
https://ubuntu.com/security/notices/USN-7889-4
https://ubuntu.com/security/notices/USN-7889-3
https://ubuntu.com/security/notices/USN-7889-2
https://ubuntu.com/security/notices/USN-7889-1
CVE-2025-21729, CVE-2025-38227, CVE-2025-38616, CVE-2025-38678

Package Information:
https://launchpad.net/ubuntu/+source/linux-hwe-6.8/6.8.0-88.89~22.04.2
https://launchpad.net/ubuntu/+source/linux-oracle-6.8/6.8.0-1040.41~22.04.1