Ubuntu 18.04 LTS Advisory: USN-4414-1 Critical Kernel Issues

ubuntu

July 2, 2020

Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux: Linux kernel

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

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

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

- linux-kvm: Linux kernel for cloud environments

- linux-oem: Linux kernel for OEM systems

- linux-oracle: Linux kernel for Oracle Cloud systems

- linux-raspi2: Linux kernel for Raspberry Pi (V7) systems

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

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

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

Details:

It was discovered that the network block device (nbd) implementation in the

Linux kernel did not properly check for error conditions in some

situations. An attacker could possibly use this to cause a denial of service

...

Read the Full Advisory

Topics Covered

security advisory denial of service Ubuntu kernel system crash file system cloud environments

Update Instructions

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

Ubuntu 18.04 LTS:
  linux-image-4.15.0-1048-oracle  4.15.0-1048.52
  linux-image-4.15.0-1064-gke     4.15.0-1064.67
  linux-image-4.15.0-1065-raspi2  4.15.0-1065.69
  linux-image-4.15.0-1069-kvm     4.15.0-1069.70
  linux-image-4.15.0-1077-aws     4.15.0-1077.81
  linux-image-4.15.0-1078-gcp     4.15.0-1078.88
  linux-image-4.15.0-1081-snapdragon  4.15.0-1081.88
  linux-image-4.15.0-109-generic  4.15.0-109.110
  linux-image-4.15.0-109-generic-lpae  4.15.0-109.110
  linux-image-4.15.0-109-lowlatency  4.15.0-109.110
  linux-image-4.15.0-1091-oem     4.15.0-1091.101
  linux-image-aws-lts-18.04       4.15.0.1077.79
  linux-image-gcp-lts-18.04       4.15.0.1078.94
  linux-image-generic             4.15.0.109.97
  linux-image-generic-lpae        4.15.0.109.97
  linux-image-gke                 4.15.0.1064.66
  linux-image-gke-4.15            4.15.0.1064.66
  linux-image-kvm                 4.15.0.1069.65
  linux-image-lowlatency          4.15.0.109.97
  linux-image-oem                 4.15.0.1091.94
  linux-image-oracle-lts-18.04    4.15.0.1048.57
  linux-image-powerpc-e500mc      4.15.0.109.97
  linux-image-powerpc-smp         4.15.0.109.97
  linux-image-powerpc64-emb       4.15.0.109.97
  linux-image-powerpc64-smp       4.15.0.109.97
  linux-image-raspi2              4.15.0.1065.63
  linux-image-snapdragon          4.15.0.1081.84
  linux-image-virtual             4.15.0.109.97

Ubuntu 16.04 LTS:
  linux-image-4.15.0-1046-oracle  4.15.0-1046.50~16.04.1
  linux-image-4.15.0-107-generic  4.15.0-107.108~16.04.1
  linux-image-4.15.0-107-generic-lpae  4.15.0-107.108~16.04.1
  linux-image-4.15.0-107-lowlatency  4.15.0-107.108~16.04.1
  linux-image-4.15.0-1074-aws     4.15.0-1074.78~16.04.1
  linux-image-4.15.0-1078-gcp     4.15.0-1078.88~16.04.1
  linux-image-aws-hwe             4.15.0.1074.74
  linux-image-gcp                 4.15.0.1078.80
  linux-image-generic-hwe-16.04   4.15.0.107.112
  linux-image-generic-lpae-hwe-16.04  4.15.0.107.112
  linux-image-gke                 4.15.0.1078.80
  linux-image-lowlatency-hwe-16.04  4.15.0.107.112
  linux-image-oem                 4.15.0.107.112
  linux-image-oracle              4.15.0.1046.39
  linux-image-virtual-hwe-16.04   4.15.0.107.112

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.