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Ubuntu 20.04 LTS USN-5517-1 Critical: Kernel Denial of Service Issues

ubuntu
Calendar Grey July 13, 2022
Dist Ubuntu Esm H88
Essential patches for Ubuntu 20.04 LTS have been released to mitigate security vulnerabilities linked to the linux-oem-5.14 kernel, which are adversely affecting system performance.
Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux-oem-5.14: Linux kernel for OEM systems

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)

It was discovered that the virtio RPMSG bus driver in the Linux kernel

contained a double-free vulnerability in certain error conditions. A local

attacker could possibly use this to cause a denial of service (system

crash). (CVE-2022-34494)

Topics%20covered

Topics Covered

security advisory denial of service critical Ubuntu kernel linux-oem

Update Instructions

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

Ubuntu 20.04 LTS:
  linux-image-5.14.0-1045-oem     5.14.0-1045.51
  linux-image-oem-20.04           5.14.0.1045.41
  linux-image-oem-20.04b          5.14.0.1045.41
  linux-image-oem-20.04c          5.14.0.1045.41
  linux-image-oem-20.04d          5.14.0.1045.41

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.

References

https://ubuntu.com/security/notices/USN-5517-1

CVE-2022-1679, CVE-2022-34494

Severity
critical
Lowest
Low
Medium
High
Critical

July 13, 2022

Topics%20covered

Topics Covered

security advisory denial of service critical Ubuntu kernel linux-oem

Package Information

https://launchpad.net/ubuntu/+source/linux-oem-5.14/5.14.0-1045.51

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