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Ubuntu 18.04 LTS USN-5991-1 Critical: Kernel Issues and Threats

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Calendar Grey March 31, 2023
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Numerous significant vulnerabilities in the Ubuntu Linux kernel tailored for GCP environments necessitate prompt updates and remediation.
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

Details:

It was discovered that the System V IPC implementation in the Linux kernel

did not properly handle large shared memory counts. A local attacker could

use this to cause a denial of service (memory exhaustion). (CVE-2021-3669)

It was discovered that a use-after-free vulnerability existed in the SGI

GRU driver in the Linux kernel. A local attacker could possibly use this to

cause a denial of service (system crash) or possibly execute arbitrary

code. (CVE-2022-3424)

Ziming Zhang discovered that the VMware Virtual GPU DRM driver in the Linux

kernel contained an out-of-bounds write vulnerability. A local attacker

could use this to cause a denial of service (system crash).

(CVE-2022-36280)

Hyunwoo Kim discovered that the DVB Core driver in the Linux kernel did not

properly perform reference counting in so...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service critical arbitrary code execution Ubuntu kernel issue

Update Instructions

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

Ubuntu 18.04 LTS:
   linux-image-4.15.0-1147-gcp     4.15.0-1147.163
   linux-image-gcp-lts-18.04       4.15.0.1147.161

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-5991-1

CVE-2021-3669, CVE-2022-3424, CVE-2022-36280, CVE-2022-41218,

CVE-2022-47929, CVE-2023-0045, CVE-2023-0266, CVE-2023-0394,

CVE-2023-23455, CVE-2023-23559, CVE-2023-28328

Severity
critical
Lowest
Low
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Critical

March 31, 2023

Topics%20covered

Topics Covered

security advisory denial of service critical arbitrary code execution Ubuntu kernel issue

Package Information

https://launchpad.net/ubuntu/+source/linux-gcp-4.15/4.15.0-1147.163

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