Ubuntu 22.04/20.04 LTS USN-6339-1 Critical: Kernel Security Issues

ubuntu

September 5, 2023

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-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-lowlatency: Linux low latency kernel

- linux-nvidia: Linux kernel for NVIDIA systems

- linux-hwe-5.15: Linux hardware enablement (HWE) kernel

- linux-lowlatency-hwe-5.15: Linux low latency kernel

Details:

It was discovered that the NTFS file system implementation in the Linux

kernel did not properly validate MFT flags in certain situations. An

attacker could use this to construct a malicious NTFS image that, when

mounted and operated on, could cause a denial of service (system crash).

(CVE-2022-48425)

Zi Fan Tan discovered that the binder IPC implementation in the Linux

kernel contained a use-after-free vulnerability. A local attacker could use

this to cause a denial of service (system cra...

Read the Full Advisory

Topics Covered

security advisory denial of service critical ubuntu linux updates kernel issues

Update Instructions

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

Ubuntu 22.04 LTS:
   linux-image-5.15.0-1032-nvidia  5.15.0-1032.32
   linux-image-5.15.0-1032-nvidia-lowlatency  5.15.0-1032.32
   linux-image-5.15.0-1037-ibm     5.15.0-1037.40
   linux-image-5.15.0-1041-gcp     5.15.0-1041.49
   linux-image-5.15.0-1041-kvm     5.15.0-1041.46
   linux-image-5.15.0-83-generic   5.15.0-83.92
   linux-image-5.15.0-83-generic-64k  5.15.0-83.92
   linux-image-5.15.0-83-generic-lpae  5.15.0-83.92
   linux-image-5.15.0-83-lowlatency  5.15.0-83.92
   linux-image-5.15.0-83-lowlatency-64k  5.15.0-83.92
   linux-image-gcp-lts-22.04       5.15.0.1041.37
   linux-image-generic             5.15.0.83.80
   linux-image-generic-64k         5.15.0.83.80
   linux-image-generic-lpae        5.15.0.83.80
   linux-image-ibm                 5.15.0.1037.33
   linux-image-kvm                 5.15.0.1041.37
   linux-image-lowlatency          5.15.0.83.85
   linux-image-lowlatency-64k      5.15.0.83.85
   linux-image-nvidia              5.15.0.1032.32
   linux-image-nvidia-lowlatency   5.15.0.1032.32
   linux-image-virtual             5.15.0.83.80

Ubuntu 20.04 LTS:
   linux-image-5.15.0-83-generic   5.15.0-83.92~20.04.1
   linux-image-5.15.0-83-generic-64k  5.15.0-83.92~20.04.1
   linux-image-5.15.0-83-generic-lpae  5.15.0-83.92~20.04.1
   linux-image-5.15.0-83-lowlatency  5.15.0-83.92~20.04.1
   linux-image-5.15.0-83-lowlatency-64k  5.15.0-83.92~20.04.1
   linux-image-generic-64k-hwe-20.04  5.15.0.83.92~20.04.41
   linux-image-generic-hwe-20.04   5.15.0.83.92~20.04.41
   linux-image-generic-lpae-hwe-20.04  5.15.0.83.92~20.04.41
   linux-image-lowlatency-64k-hwe-20.04  5.15.0.83.92~20.04.38
   linux-image-lowlatency-hwe-20.04  5.15.0.83.92~20.04.38
   linux-image-oem-20.04           5.15.0.83.92~20.04.41
   linux-image-oem-20.04b          5.15.0.83.92~20.04.41
   linux-image-oem-20.04c          5.15.0.83.92~20.04.41
   linux-image-oem-20.04d          5.15.0.83.92~20.04.41
   linux-image-virtual-hwe-20.04   5.15.0.83.92~20.04.41

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.