Ubuntu 22.04 LTS USN-5876-1 Critical: Kernel Memory Leak and DoS

ubuntu

February 15, 2023

Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux-aws: Linux kernel for Amazon Web Services (AWS) systems

- linux-azure-fde: Linux kernel for Microsoft Azure CVM cloud systems

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

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

- linux-aws-5.15: Linux kernel for Amazon Web Services (AWS) systems

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

Details:

It was discovered that a memory leak existed in the Unix domain socket

implementation of the Linux kernel. A local attacker could use this to

cause a denial of service (memory exhaustion). (CVE-2022-3543)

It was discovered that the Bluetooth HCI implementation in the Linux kernel

did not properly deallocate memory in some situations. An attacker could

possibly use this cause a denial of service (memory exhaustion).

(CVE-2022-3619)

It was discovered that the hugetlb implementation ...

Read the Full Advisory

Topics Covered

security advisory denial of service memory leak kernel ubuntu azure aws

Update Instructions

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

Ubuntu 22.04 LTS:
   linux-image-5.15.0-1025-intel-iotg  5.15.0-1025.30
   linux-image-5.15.0-1029-gcp     5.15.0-1029.36
   linux-image-5.15.0-1030-aws     5.15.0-1030.34
   linux-image-5.15.0-1033-azure-fde  5.15.0-1033.40.1
   linux-image-aws                 5.15.0.1030.28
   linux-image-aws-lts-22.04       5.15.0.1030.28
   linux-image-azure-fde           5.15.0.1033.40.10
   linux-image-gcp                 5.15.0.1029.24
   linux-image-intel-iotg          5.15.0.1025.24

Ubuntu 20.04 LTS:
   linux-image-5.15.0-1029-gcp     5.15.0-1029.36~20.04.1
   linux-image-5.15.0-1030-aws     5.15.0-1030.34~20.04.1
   linux-image-aws                 5.15.0.1030.34~20.04.19
   linux-image-gcp                 5.15.0.1029.36~20.04.1

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.