Ubuntu 24.04/22.04 LTS USN-7595-1: important Linux kernel issues

ubuntu

June 24, 2025

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-aws: Linux kernel for Amazon Web Services (AWS) systems

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

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

- linux-ibm: Linux kernel for IBM cloud systems

- linux-lowlatency: Linux low latency kernel

- linux-nvidia: Linux kernel for NVIDIA systems

- linux-nvidia-lowlatency: Linux low latency kernel for NVIDIA systems

- linux-oem-6.8: Linux kernel for OEM systems

- linux-aws-6.8: Linux kernel for Amazon Web Services (AWS) systems

- linux-lowlatency-hwe-6.8: Linux low latency kernel

- linux-nvidia-6.8: Linux kernel for NVIDIA systems

Details:

It was discovered that the CIFS network file system implementation in the

Linux kernel did not properly verify the target namespace when handling

upcalls. An attacker could use this to expose sensitive information.

(CVE-2025-2312)

...

Read the Full Advisory

Topics Covered

security advisory Ubuntu important kernel network attack CIFS issue

Update Instructions

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

Ubuntu 24.04 LTS
   linux-image-6.8.0-1013-gkeop    6.8.0-1013.15
   linux-image-6.8.0-1026-gke      6.8.0-1026.30
   linux-image-6.8.0-1027-ibm      6.8.0-1027.27
   linux-image-6.8.0-1029-nvidia   6.8.0-1029.32
   linux-image-6.8.0-1029-nvidia-64k  6.8.0-1029.32
   linux-image-6.8.0-1029-nvidia-lowlatency  6.8.0-1029.32.1
   linux-image-6.8.0-1029-nvidia-lowlatency-64k  6.8.0-1029.32.1
   linux-image-6.8.0-1029-oem      6.8.0-1029.29
   linux-image-6.8.0-1030-aws      6.8.0-1030.32
   linux-image-6.8.0-1030-aws-64k  6.8.0-1030.32
   linux-image-6.8.0-62-generic    6.8.0-62.65
   linux-image-6.8.0-62-generic-64k  6.8.0-62.65
   linux-image-6.8.0-62-lowlatency  6.8.0-62.65.1
   linux-image-6.8.0-62-lowlatency-64k  6.8.0-62.65.1
   linux-image-aws                 6.8.0-1030.32+1
   linux-image-aws-64k             6.8.0-1030.32+1
   linux-image-aws-64k-lts-24.04   6.8.0-1030.32+1
   linux-image-aws-lts-24.04       6.8.0-1030.32+1
   linux-image-generic             6.8.0-62.65
   linux-image-generic-64k         6.8.0-62.65
   linux-image-generic-lpae        6.8.0-62.65
   linux-image-gke                 6.8.0-1026.30
   linux-image-gkeop               6.8.0-1013.15
   linux-image-gkeop-6.8           6.8.0-1013.15
   linux-image-ibm                 6.8.0-1027.27
   linux-image-ibm-classic         6.8.0-1027.27
   linux-image-ibm-lts-24.04       6.8.0-1027.27
   linux-image-kvm                 6.8.0-62.65
   linux-image-lowlatency          6.8.0-62.65.1
   linux-image-lowlatency-64k      6.8.0-62.65.1
   linux-image-nvidia              6.8.0-1029.32
   linux-image-nvidia-64k          6.8.0-1029.32
   linux-image-nvidia-lowlatency   6.8.0-1029.32.1
   linux-image-nvidia-lowlatency-64k  6.8.0-1029.32.1
   linux-image-oem-24.04           6.8.0-1029.29
   linux-image-oem-24.04a          6.8.0-1029.29
   linux-image-virtual             6.8.0-62.65

Ubuntu 22.04 LTS
   linux-image-6.8.0-1029-nvidia   6.8.0-1029.32~22.04.1
   linux-image-6.8.0-1029-nvidia-64k  6.8.0-1029.32~22.04.1
   linux-image-6.8.0-1030-aws      6.8.0-1030.32~22.04.1
   linux-image-6.8.0-1030-aws-64k  6.8.0-1030.32~22.04.1
   linux-image-6.8.0-62-lowlatency  6.8.0-62.65.1~22.04.1
   linux-image-6.8.0-62-lowlatency-64k  6.8.0-62.65.1~22.04.1
   linux-image-aws                 6.8.0-1030.32~22.04.1+1
   linux-image-aws-64k             6.8.0-1030.32~22.04.1+1
   linux-image-lowlatency-64k-hwe-22.04  6.8.0-62.65.1~22.04.1
   linux-image-lowlatency-hwe-22.04  6.8.0-62.65.1~22.04.1
   linux-image-nvidia-6.8          6.8.0-1029.32~22.04.1
   linux-image-nvidia-64k-6.8      6.8.0-1029.32~22.04.1
   linux-image-nvidia-64k-hwe-22.04  6.8.0-1029.32~22.04.1
   linux-image-nvidia-hwe-22.04    6.8.0-1029.32~22.04.1

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.