Ubuntu 23.04 USN-6228-1 Critical: Kernel Denial Of Service Issues

ubuntu

July 13, 2023

Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux-azure: Linux kernel for Microsoft Azure Cloud systems

- linux-gcp: Linux kernel for Google Cloud Platform (GCP) systems

- linux-ibm: Linux kernel for IBM cloud systems

- linux-oracle: Linux kernel for Oracle Cloud systems

Details:

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

kernel did not properly perform metadata validation when mounting certain

images. An attacker could use this to specially craft a file system image

that, when mounted, could cause a denial of service (system crash).

(CVE-2023-2124)

Wei Chen discovered that the InfiniBand RDMA communication manager

implementation in the Linux kernel contained an out-of-bounds read

vulnerability. A local attacker could use this to cause a denial of service

(system crash). (CVE-2023-2176)

Topics Covered

security advisory denial of service security issue critical kernel ubuntu cloud systems

Update Instructions

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

Ubuntu 23.04:
   linux-image-6.2.0-1005-ibm      6.2.0-1005.5
   linux-image-6.2.0-1007-azure    6.2.0-1007.7
   linux-image-6.2.0-1007-oracle   6.2.0-1007.7
   linux-image-6.2.0-1009-gcp      6.2.0-1009.9
   linux-image-azure               6.2.0.1007.7
   linux-image-gcp                 6.2.0.1009.9
   linux-image-ibm                 6.2.0.1005.5
   linux-image-oracle              6.2.0.1007.7

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.