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Ubuntu 22.04 LTS USN-5729-2 Critical: Kernel Denial Of Service Issues

ubuntu
Calendar Grey November 18, 2022
Dist Ubuntu Esm H88
Major vulnerabilities addressed in the Linux kernel impacting Ubuntu versions 20.04 and 22.04. Essential patches for enhanced system security.
Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux-intel-iotg: Linux kernel for Intel IoT platforms

- linux-raspi: Linux kernel for Raspberry Pi systems

- linux-gcp-5.15: Linux kernel for Google Cloud Platform (GCP) systems

- linux-gke-5.15: Linux kernel for Google Container Engine (GKE) systems

Details:

It was discovered that a race condition existed in the instruction emulator

of the Linux kernel on Arm 64-bit systems. A local attacker could use this

to cause a denial of service (system crash). (CVE-2022-20422)

Hsin-Wei Hung discovered that the BPF subsystem in the Linux kernel

contained an out-of-bounds read vulnerability in the x86 JIT compiler. A

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

crash) or expose sensitive information (kernel memory). (CVE-2022-2905)

Hao Sun and Jiacheng Xu discovered that the NILFS file system

implementation in the Linux kernel contained a use-after-free

vulnerability. A local a...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service kernel fix local attack ubuntu system crash

Update Instructions

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

Ubuntu 22.04 LTS:
  linux-image-5.15.0-1018-intel-iotg  5.15.0-1018.23
  linux-image-5.15.0-1018-raspi   5.15.0-1018.20
  linux-image-5.15.0-1018-raspi-nolpae  5.15.0-1018.20
  linux-image-intel-iotg          5.15.0.1018.19
  linux-image-raspi               5.15.0.1018.17
  linux-image-raspi-nolpae        5.15.0.1018.17

Ubuntu 20.04 LTS:
  linux-image-5.15.0-1020-gke     5.15.0-1020.25~20.04.1
  linux-image-5.15.0-1022-gcp     5.15.0-1022.29~20.04.1
  linux-image-gcp                 5.15.0.1022.29~20.04.1
  linux-image-gke-5.15            5.15.0.1020.25~20.04.1

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-5729-2

https://ubuntu.com/security/notices/USN-5729-1

CVE-2022-20422, CVE-2022-2905, CVE-2022-2978, CVE-2022-3028,

CVE-2022-3625, CVE-2022-3635, CVE-2022-39190, CVE-2022-40768

Severity
critical
Lowest
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Medium
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Critical

November 18, 2022

Topics%20covered

Topics Covered

security advisory denial of service kernel fix local attack ubuntu system crash

Package Information

https://launchpad.net/ubuntu/+source/linux-intel-iotg/5.15.0-1018.23
https://launchpad.net/ubuntu/+source/linux-raspi/5.15.0-1018.20
https://launchpad.net/ubuntu/+source/linux-gcp-5.15/5.15.0-1022.29~20.04.1

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