Ubuntu 22.10 USN-6171-1 Critical Kernel Denial Of Service Threats

ubuntu

June 16, 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:

William Zhao discovered that the Traffic Control (TC) subsystem in the

Linux kernel did not properly handle network packet retransmission in

certain situations. A local attacker could use this to cause a denial of

service (kernel deadlock). (CVE-2022-4269)

It was discovered that the TUN/TAP driver in the Linux kernel did not

properly initialize socket data. A local attacker could use this to cause a

denial ...

Read the Full Advisory

Topics Covered

security advisory denial of service critical issue kernel ubuntu system crash

Update Instructions

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

Ubuntu 22.10:
   linux-image-5.19.0-1021-raspi   5.19.0-1021.28
   linux-image-5.19.0-1021-raspi-nolpae  5.19.0-1021.28
   linux-image-5.19.0-1025-kvm     5.19.0-1025.26
   linux-image-5.19.0-1025-oracle  5.19.0-1025.28
   linux-image-5.19.0-1026-gcp     5.19.0-1026.28
   linux-image-5.19.0-1027-aws     5.19.0-1027.28
   linux-image-5.19.0-1027-lowlatency  5.19.0-1027.28
   linux-image-5.19.0-1027-lowlatency-64k  5.19.0-1027.28
   linux-image-5.19.0-1028-azure   5.19.0-1028.31
   linux-image-5.19.0-45-generic   5.19.0-45.46
   linux-image-5.19.0-45-generic-64k  5.19.0-45.46
   linux-image-5.19.0-45-generic-lpae  5.19.0-45.46
   linux-image-aws                 5.19.0.1027.24
   linux-image-azure               5.19.0.1028.23
   linux-image-gcp                 5.19.0.1026.22
   linux-image-generic             5.19.0.45.41
   linux-image-generic-64k         5.19.0.45.41
   linux-image-generic-lpae        5.19.0.45.41
   linux-image-kvm                 5.19.0.1025.22
   linux-image-lowlatency          5.19.0.1027.23
   linux-image-lowlatency-64k      5.19.0.1027.23
   linux-image-oracle              5.19.0.1025.21
   linux-image-raspi               5.19.0.1021.20
   linux-image-raspi-nolpae        5.19.0.1021.20
   linux-image-virtual             5.19.0.45.41

Ubuntu 22.04 LTS:
   linux-image-5.19.0-45-generic   5.19.0-45.46~22.04.1
   linux-image-5.19.0-45-generic-64k  5.19.0-45.46~22.04.1
   linux-image-5.19.0-45-generic-lpae  5.19.0-45.46~22.04.1
   linux-image-generic-64k-hwe-22.04  5.19.0.45.46~22.04.20
   linux-image-generic-hwe-22.04   5.19.0.45.46~22.04.20
   linux-image-generic-lpae-hwe-22.04  5.19.0.45.46~22.04.20
   linux-image-virtual-hwe-22.04   5.19.0.45.46~22.04.20

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.