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Ubuntu 18.04/16.04 LTS USN-5727-2 Critical: GCP Kernel Denial of Service

ubuntu
Calendar Grey November 18, 2022
Dist Ubuntu Esm H88
Multiple vulnerabilities resolved in the Ubuntu Linux kernel. Update your system promptly to avoid potential risks and enhance overall performance.
Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux-gcp-4.15: Linux kernel for Google Cloud Platform (GCP) systems

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

It was discovered that the KVM implementation in the Linux kernel did not

properly handle virtual CPUs without APICs in certain situations. A local

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

crash). (CVE-2022-2153)

Hao Sun and Jiacheng Xu discovered that the NILFS file system

implementation in the Linux kernel contained 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-2022-2978)

Abhishek Shah discovered a race conditi...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service critical issue kernel patch Ubuntu system update GCP kernel

Update Instructions

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

Ubuntu 18.04 LTS:
  linux-image-4.15.0-1138-gcp     4.15.0-1138.154
  linux-image-gcp-lts-18.04       4.15.0.1138.154

Ubuntu 16.04 ESM:
  linux-image-4.15.0-1138-gcp     4.15.0-1138.154~16.04.1
  linux-image-gcp                 4.15.0.1138.132
  linux-image-gke                 4.15.0.1138.132

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-5727-1

CVE-2022-20422, CVE-2022-2153, CVE-2022-2978, CVE-2022-3028,

CVE-2022-3635, CVE-2022-36879, CVE-2022-40768

Severity
critical
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Critical

November 18, 2022

Topics%20covered

Topics Covered

security advisory denial of service critical issue kernel patch Ubuntu system update GCP kernel

Package Information

https://launchpad.net/ubuntu/+source/linux-gcp-4.15/4.15.0-1138.154

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