Ubuntu 22.10 USN-5793-1 Critical: Kernel DoS Issues and Fixes

ubuntu

January 6, 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 io_uring subsystem in the Linux kernel did not

properly perform reference counting in some situations, leading to 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-2022-3910)

It was discovered that a race condition existed in the Android Binder IPC

subsystem in the Linux kernel, leading to 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-2022-20421)

David Leadbeater discovered that the netfilter IRC protocol tracking

i...

Read the Full Advisory

Topics Covered

security advisory critical DoS Ubuntu issue kernel system crash

Update Instructions

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

Ubuntu 22.10:
   linux-image-5.19.0-1011-raspi   5.19.0-1011.18
   linux-image-5.19.0-1011-raspi-nolpae  5.19.0-1011.18
   linux-image-5.19.0-1014-lowlatency  5.19.0-1014.15
   linux-image-5.19.0-1014-lowlatency-64k  5.19.0-1014.15
   linux-image-5.19.0-1015-kvm     5.19.0-1015.16
   linux-image-5.19.0-1016-aws     5.19.0-1016.17
   linux-image-5.19.0-28-generic   5.19.0-28.29
   linux-image-5.19.0-28-generic-64k  5.19.0-28.29
   linux-image-5.19.0-28-generic-lpae  5.19.0-28.29
   linux-image-aws                 5.19.0.1016.13
   linux-image-generic             5.19.0.28.25
   linux-image-generic-64k         5.19.0.28.25
   linux-image-generic-64k-hwe-22.04  5.19.0.28.25
   linux-image-generic-hwe-22.04   5.19.0.28.25
   linux-image-generic-lpae        5.19.0.28.25
   linux-image-generic-lpae-hwe-22.04  5.19.0.28.25
   linux-image-kvm                 5.19.0.1015.12
   linux-image-lowlatency          5.19.0.1014.11
   linux-image-lowlatency-64k      5.19.0.1014.11
   linux-image-lowlatency-64k-hwe-22.04  5.19.0.1014.11
   linux-image-lowlatency-hwe-22.04  5.19.0.1014.11
   linux-image-oem-22.04           5.19.0.28.25
   linux-image-raspi               5.19.0.1011.10
   linux-image-raspi-nolpae        5.19.0.1011.10
   linux-image-virtual             5.19.0.28.25
   linux-image-virtual-hwe-22.04   5.19.0.28.25

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.