Ubuntu 22.04 LTS: USN-5544-1 Critical Denial Of Service Remediation

ubuntu

August 2, 2022

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-lowlatency: Linux low latency kernel

- linux-hwe-5.15: Linux hardware enablement (HWE) kernel

- linux-lowlatency-hwe-5.15: Linux low latency kernel

Details:

It was discovered that the Atheros ath9k wireless device driver in the

Linux kernel did not properly handle some error conditions, 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-2022-1679)

Felix Fu discovered that the Sun RPC implementation in the Linux kernel did

not properly handle socket states, leading to a use-after-free

vulnerability. A remote attacker could possibly use this to cause a denial

of service (system crash) or execute arbitrary code. (CVE-2022-28893)

Arthur Mongodin discovered that the netfilter subsystem in the Linux kernel

did not properly perform data validation. A local attacker could...

Read the Full Advisory

Topics Covered

security advisory denial of service critical Ubuntu update instructions system crash Linux kernel

Update Instructions

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

Ubuntu 22.04 LTS:
  linux-image-5.15.0-43-generic   5.15.0-43.46
  linux-image-5.15.0-43-generic-64k  5.15.0-43.46
  linux-image-5.15.0-43-generic-lpae  5.15.0-43.46
  linux-image-5.15.0-43-lowlatency  5.15.0-43.46
  linux-image-5.15.0-43-lowlatency-64k  5.15.0-43.46
  linux-image-generic             5.15.0.43.44
  linux-image-generic-64k         5.15.0.43.44
  linux-image-generic-64k-hwe-22.04  5.15.0.43.44
  linux-image-generic-hwe-22.04   5.15.0.43.44
  linux-image-generic-lpae        5.15.0.43.44
  linux-image-generic-lpae-hwe-22.04  5.15.0.43.44
  linux-image-lowlatency          5.15.0.43.41
  linux-image-lowlatency-64k      5.15.0.43.41
  linux-image-lowlatency-64k-hwe-22.04  5.15.0.43.41
  linux-image-lowlatency-hwe-22.04  5.15.0.43.41
  linux-image-oem-20.04           5.15.0.43.44
  linux-image-virtual             5.15.0.43.44
  linux-image-virtual-hwe-22.04   5.15.0.43.44

Ubuntu 20.04 LTS:
  linux-image-5.15.0-43-generic   5.15.0-43.46~20.04.1
  linux-image-5.15.0-43-generic-64k  5.15.0-43.46~20.04.1
  linux-image-5.15.0-43-generic-lpae  5.15.0-43.46~20.04.1
  linux-image-5.15.0-43-lowlatency  5.15.0-43.46~20.04.1
  linux-image-5.15.0-43-lowlatency-64k  5.15.0-43.46~20.04.1
  linux-image-generic-64k-hwe-20.04  5.15.0.43.46~20.04.14
  linux-image-generic-hwe-20.04   5.15.0.43.46~20.04.14
  linux-image-generic-lpae-hwe-20.04  5.15.0.43.46~20.04.14
  linux-image-lowlatency-64k-hwe-20.04  5.15.0.43.46~20.04.13
  linux-image-lowlatency-hwe-20.04  5.15.0.43.46~20.04.13
  linux-image-virtual-hwe-20.04   5.15.0.43.46~20.04.14

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.