Ubuntu 23.04: USN-6224-1 Critical: Kernel Denial Of Service Threat

ubuntu

July 12, 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-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)

Topics Covered

security advisory denial of service update Ubuntu kernel out-of-bounds XFS

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.