Ubuntu 22.10, 22.04 LTS: USN-6024-1 Moderate Kernel Security Advisory

ubuntu

April 19, 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-azure: Linux kernel for Microsoft Azure Cloud systems

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

- linux-kvm: Linux kernel for cloud environments

- linux-lowlatency: Linux low latency kernel

- linux-oracle: Linux kernel for Oracle Cloud systems

- linux-raspi: Linux kernel for Raspberry Pi systems

- linux-hwe-5.19: Linux hardware enablement (HWE) kernel

Details:

It was discovered that the Traffic-Control Index (TCINDEX) implementation

in the Linux kernel contained a use-after-free vulnerability. A local

attacker could use this to cause a denial of service (system crash) or

possibly execute arbitrary code. (CVE-2023-1281)

Lin Ma discovered a race condition in the io_uring subsystem in the Linux

kernel, leading to a null pointer dereference vulnerability. A local

att...

Read the Full Advisory

Topics Covered

security advisory denial of service code execution kernel system update ubuntu linux kernel

Update Instructions

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

Ubuntu 22.10:
   linux-image-5.19.0-1016-raspi   5.19.0-1016.23
   linux-image-5.19.0-1016-raspi-nolpae  5.19.0-1016.23
   linux-image-5.19.0-1020-gcp     5.19.0-1020.22
   linux-image-5.19.0-1020-oracle  5.19.0-1020.23
   linux-image-5.19.0-1021-kvm     5.19.0-1021.22
   linux-image-5.19.0-1022-lowlatency  5.19.0-1022.23
   linux-image-5.19.0-1022-lowlatency-64k  5.19.0-1022.23
   linux-image-5.19.0-1023-aws     5.19.0-1023.24
   linux-image-5.19.0-1023-azure   5.19.0-1023.24
   linux-image-5.19.0-40-generic   5.19.0-40.41
   linux-image-5.19.0-40-generic-64k  5.19.0-40.41
   linux-image-5.19.0-40-generic-lpae  5.19.0-40.41
   linux-image-aws                 5.19.0.1023.20
   linux-image-azure               5.19.0.1023.19
   linux-image-gcp                 5.19.0.1020.17
   linux-image-generic             5.19.0.40.36
   linux-image-generic-64k         5.19.0.40.36
   linux-image-generic-lpae        5.19.0.40.36
   linux-image-kvm                 5.19.0.1021.18
   linux-image-lowlatency          5.19.0.1022.18
   linux-image-lowlatency-64k      5.19.0.1022.18
   linux-image-oracle              5.19.0.1020.17
   linux-image-raspi               5.19.0.1016.15
   linux-image-raspi-nolpae        5.19.0.1016.15
   linux-image-virtual             5.19.0.40.36

Ubuntu 22.04 LTS:
   linux-image-5.19.0-40-generic   5.19.0-40.41~22.04.1
   linux-image-5.19.0-40-generic-64k  5.19.0-40.41~22.04.1
   linux-image-5.19.0-40-generic-lpae  5.19.0-40.41~22.04.1
   linux-image-generic-64k-hwe-22.04  5.19.0.40.41~22.04.13
   linux-image-generic-hwe-22.04   5.19.0.40.41~22.04.13
   linux-image-generic-lpae-hwe-22.04  5.19.0.40.41~22.04.13
   linux-image-virtual-hwe-22.04   5.19.0.40.41~22.04.13

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.