[USN-6224-1] Linux kernel vulnerabilities

[Rodrigo Figueiredo Zaiden]

==========================================================================
Ubuntu Security Notice USN-6224-1
July 12, 2023

linux, linux-aws, linux-kvm, linux-lowlatency, linux-raspi vulnerabilities
==========================================================================

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

- Ubuntu 23.04

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-kvm: Linux kernel for cloud environments
- linux-lowlatency: Linux low latency kernel
- linux-raspi: Linux kernel for Raspberry Pi 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)

Update instructions:

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

Ubuntu 23.04:
   linux-image-6.2.0-1007-aws      6.2.0-1007.7
   linux-image-6.2.0-1008-kvm      6.2.0-1008.8
   linux-image-6.2.0-1008-lowlatency  6.2.0-1008.8
   linux-image-6.2.0-1008-lowlatency-64k  6.2.0-1008.8
   linux-image-6.2.0-1008-raspi    6.2.0-1008.10
   linux-image-6.2.0-25-generic    6.2.0-25.25
   linux-image-6.2.0-25-generic-64k  6.2.0-25.25
   linux-image-6.2.0-25-generic-lpae  6.2.0-25.25
   linux-image-aws                 6.2.0.1007.8
   linux-image-generic             6.2.0.25.25
   linux-image-generic-64k         6.2.0.25.25
   linux-image-generic-lpae        6.2.0.25.25
   linux-image-kvm                 6.2.0.1008.8
   linux-image-lowlatency          6.2.0.1008.8
   linux-image-lowlatency-64k      6.2.0.1008.8
   linux-image-raspi               6.2.0.1008.11
   linux-image-raspi-nolpae        6.2.0.1008.11
   linux-image-virtual             6.2.0.25.25

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.

References:
   https://ubuntu.com/security/notices/USN-6224-1
   CVE-2023-2124, CVE-2023-2176

Package Information:
   https://launchpad.net/ubuntu/+source/linux/6.2.0-25.25
   https://launchpad.net/ubuntu/+source/linux-aws/6.2.0-1007.7
   https://launchpad.net/ubuntu/+source/linux-kvm/6.2.0-1008.8
   https://launchpad.net/ubuntu/+source/linux-lowlatency/6.2.0-1008.8
   https://launchpad.net/ubuntu/+source/linux-raspi/6.2.0-1008.10

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