[USN-6228-1] Linux kernel vulnerabilities

Rodrigo Figueiredo Zaiden rodrigo.zaiden at canonical.com
Thu Jul 13 14:23:08 UTC 2023

Ubuntu Security Notice USN-6228-1
July 13, 2023

linux-azure, linux-gcp, linux-ibm, linux-oracle vulnerabilities

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 23.04


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


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).

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)

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

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.

   CVE-2023-2124, CVE-2023-2176

Package Information:

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