Ubuntu 24.04 LTS Critical Linux Kernel Security Flaws USN-8015-1

ubuntu

February 4, 2026

Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux: Linux kernel

- linux-gke: Linux kernel for Google Container Engine (GKE) systems

- linux-gkeop: Linux kernel for Google Container Engine (GKE) systems

- linux-oracle: Linux kernel for Oracle Cloud systems

- linux-raspi: Linux kernel for Raspberry Pi systems

- 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:

- Cryptographic API;

- SMB network file system;

- io_uring subsystem;

(CVE-2025-38561, CVE-2025-39698, CVE-2025-40019)

Topics Covered

security advisory security issue critical Ubuntu kernel system update

Update Instructions

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

Ubuntu 24.04 LTS
   linux-image-6.8.0-1029-gkeop    6.8.0-1029.32
   linux-image-6.8.0-1042-gke      6.8.0-1042.47
   linux-image-6.8.0-1042-gke-64k  6.8.0-1042.47
   linux-image-6.8.0-1042-oracle   6.8.0-1042.43
   linux-image-6.8.0-1042-oracle-64k  6.8.0-1042.43
   linux-image-6.8.0-1045-raspi    6.8.0-1045.49
   linux-image-6.8.0-94-generic    6.8.0-94.96
   linux-image-6.8.0-94-generic-64k  6.8.0-94.96
   linux-image-generic             6.8.0-94.96
   linux-image-generic-6.8         6.8.0-94.96
   linux-image-generic-64k         6.8.0-94.96
   linux-image-generic-64k-6.8     6.8.0-94.96
   linux-image-generic-lpae        6.8.0-94.96
   linux-image-gke                 6.8.0-1042.47
   linux-image-gke-6.8             6.8.0-1042.47
   linux-image-gke-64k             6.8.0-1042.47
   linux-image-gke-64k-6.8         6.8.0-1042.47
   linux-image-gkeop               6.8.0-1029.32
   linux-image-gkeop-6.8           6.8.0-1029.32
   linux-image-intel-iotg          6.8.0-94.96
   linux-image-kvm                 6.8.0-94.96
   linux-image-oracle-6.8          6.8.0-1042.43
   linux-image-oracle-64k-6.8      6.8.0-1042.43
   linux-image-oracle-64k-lts-24.04  6.8.0-1042.43
   linux-image-oracle-lts-24.04    6.8.0-1042.43
   linux-image-raspi               6.8.0-1045.49
   linux-image-raspi-6.8           6.8.0-1045.49
   linux-image-virtual             6.8.0-94.96
   linux-image-virtual-6.8         6.8.0-94.96

Ubuntu 22.04 LTS
   linux-image-6.8.0-1042-oracle   6.8.0-1042.43~22.04.1
   linux-image-6.8.0-1042-oracle-64k  6.8.0-1042.43~22.04.1
   linux-image-6.8.0-94-generic    6.8.0-94.96~22.04.1
   linux-image-6.8.0-94-generic-64k  6.8.0-94.96~22.04.1
   linux-image-generic-6.8         6.8.0-94.96~22.04.1
   linux-image-generic-64k-6.8     6.8.0-94.96~22.04.1
   linux-image-generic-64k-hwe-22.04  6.8.0-94.96~22.04.1
   linux-image-generic-hwe-22.04   6.8.0-94.96~22.04.1
   linux-image-oem-22.04           6.8.0-94.96~22.04.1
   linux-image-oem-22.04a          6.8.0-94.96~22.04.1
   linux-image-oem-22.04b          6.8.0-94.96~22.04.1
   linux-image-oem-22.04c          6.8.0-94.96~22.04.1
   linux-image-oem-22.04d          6.8.0-94.96~22.04.1
   linux-image-oracle              6.8.0-1042.43~22.04.1
   linux-image-oracle-6.8          6.8.0-1042.43~22.04.1
   linux-image-oracle-64k          6.8.0-1042.43~22.04.1
   linux-image-oracle-64k-6.8      6.8.0-1042.43~22.04.1
   linux-image-virtual-6.8         6.8.0-94.96~22.04.1
   linux-image-virtual-hwe-22.04   6.8.0-94.96~22.04.1

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.