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Ubuntu 20.04: USN-6339-2 High Severity: Linux Kernel Issues

ubuntu
Calendar Grey September 8, 2023
Dist Ubuntu Esm H88
Critical patches have been issued to rectify various kernel flaws in Ubuntu, enhancing system stability and mitigating potential threats to users' safety.
Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

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

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

Details:

It was discovered that the NTFS file system implementation in the Linux

kernel did not properly validate MFT flags in certain situations. An

attacker could use this to construct a malicious NTFS image that, when

mounted and operated on, could cause a denial of service (system crash).

(CVE-2022-48425)

Zi Fan Tan discovered that the binder IPC 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-2023-21255)

It was discovered that a race condition existed in the f2fs file system in

the Linux kernel, leading to a null pointer dereference vulnerability. An

attacker could use this to construct a malicious f2fs image...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service update instructions ubuntu system crash kernel updates linux kernel

Update Instructions

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

Ubuntu 20.04 LTS:
  linux-image-5.15.0-1027-gkeop   5.15.0-1027.32~20.04.1
  linux-image-5.15.0-1041-gcp     5.15.0-1041.49~20.04.1
  linux-image-gcp                 5.15.0.1041.49~20.04.1
  linux-image-gkeop-5.15          5.15.0.1027.32~20.04.23

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-6339-2

https://ubuntu.com/security/notices/USN-6339-1

CVE-2022-48425, CVE-2023-21255, CVE-2023-2898, CVE-2023-31084,

CVE-2023-3212, CVE-2023-38426, CVE-2023-38428, CVE-2023-38429

Ubuntu Security Notice USN-6339-2

Topics%20covered

Topics Covered

security advisory denial of service update instructions ubuntu system crash kernel updates linux kernel

Package Information

https://launchpad.net/ubuntu/+source/linux-gcp-5.15/5.15.0-1041.49~20.04.1
https://launchpad.net/ubuntu/+source/linux-gkeop-5.15/5.15.0-1027.32~20.04.1

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