Ubuntu 18.04 LTS: USN-4115-2 Critical Kernel Crash Advisory

ubuntu

September 11, 2019

USN 4115-1 introduced a regression in the Linux kernel.

Summary

USN 4115-1 introduced a regression in the Linux kernel.

Software Description:

- linux: Linux kernel

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

- linux-gke-4.15: Linux kernel for Google Container Engine (GKE) systems

- linux-kvm: Linux kernel for cloud environments

- linux-oracle: Linux kernel for Oracle Cloud systems

- linux-raspi2: Linux kernel for Raspberry Pi 2

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

- linux-azure: Linux kernel for Microsoft Azure Cloud systems

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

- linux-hwe: Linux hardware enablement (HWE) kernel

Details:

USN 4115-1 fixed vulnerabilities in the Linux 4.15 kernel for Ubuntu

18.04 LTS and Ubuntu 16.04 LTS. Unfortunately, as part of the update,

a regression was introduced that caused a kernel crash when handling

fragmented packets in some situations. This update addresses the issue.

We apologize for the inconvenience.

Original advisory details:

...

Read the Full Advisory

Topics Covered

security advisory denial of service Ubuntu kernel system crash

Update Instructions

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

Ubuntu 18.04 LTS:
  linux-image-4.15.0-1023-oracle  4.15.0-1023.26
  linux-image-4.15.0-1042-gke     4.15.0-1042.44
  linux-image-4.15.0-1044-kvm     4.15.0-1044.44
  linux-image-4.15.0-1045-raspi2  4.15.0-1045.49
  linux-image-4.15.0-1048-aws     4.15.0-1048.50
  linux-image-4.15.0-62-generic   4.15.0-62.69
  linux-image-4.15.0-62-generic-lpae  4.15.0-62.69
  linux-image-4.15.0-62-lowlatency  4.15.0-62.69
  linux-image-aws                 4.15.0.1048.47
  linux-image-generic             4.15.0.62.64
  linux-image-generic-lpae        4.15.0.62.64
  linux-image-gke                 4.15.0.1042.45
  linux-image-gke-4.15            4.15.0.1042.45
  linux-image-kvm                 4.15.0.1044.44
  linux-image-lowlatency          4.15.0.62.64
  linux-image-oracle              4.15.0.1023.26
  linux-image-powerpc-e500mc      4.15.0.62.64
  linux-image-powerpc-smp         4.15.0.62.64
  linux-image-powerpc64-emb       4.15.0.62.64
  linux-image-powerpc64-smp       4.15.0.62.64
  linux-image-raspi2              4.15.0.1045.43
  linux-image-virtual             4.15.0.62.64

Ubuntu 16.04 LTS:
  linux-image-4.15.0-1023-oracle  4.15.0-1023.26~16.04.1
  linux-image-4.15.0-1042-gcp     4.15.0-1042.44
  linux-image-4.15.0-1048-aws     4.15.0-1048.50~16.04.1
  linux-image-4.15.0-1057-azure   4.15.0-1057.62
  linux-image-4.15.0-62-generic   4.15.0-62.69~16.04.1
  linux-image-4.15.0-62-generic-lpae  4.15.0-62.69~16.04.1
  linux-image-4.15.0-62-lowlatency  4.15.0-62.69~16.04.1
  linux-image-aws-hwe             4.15.0.1048.48
  linux-image-azure               4.15.0.1057.60
  linux-image-gcp                 4.15.0.1042.56
  linux-image-generic-hwe-16.04   4.15.0.62.82
  linux-image-generic-lpae-hwe-16.04  4.15.0.62.82
  linux-image-gke                 4.15.0.1042.56
  linux-image-lowlatency-hwe-16.04  4.15.0.62.82
  linux-image-oem                 4.15.0.62.82
  linux-image-oracle              4.15.0.1023.17
  linux-image-virtual-hwe-16.04   4.15.0.62.82

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.