Ubuntu 18.04 LTS: USN-4157-2 Critical: Kernel Denial Of Service Risk

ubuntu

October 21, 2019

Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

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

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

- linux-gke-5.0: Linux kernel for Google Container Engine (GKE) systems

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

Details:

USN-4157-1 fixed vulnerabilities in the Linux kernel for Ubuntu 19.04.

This update provides the corresponding updates for the Linux

Hardware Enablement (HWE) kernel from Ubuntu 19.04 for Ubuntu

18.04 LTS.

Wen Huang discovered that the Marvell Wi-Fi device driver in the Linux

kernel did not properly perform bounds checking, leading to a heap

overflow. A local attacker could use this to cause a denial of service

(system crash) or possibly execute arbitrary code. (CVE-2019-14814,

CVE-2019-14815, CVE-2019-14816)

Matt Delco discovered that the KVM hypervisor implementation in the Linux

kernel did not properly perform bounds checking when handling co...

Read the Full Advisory

Topics Covered

security advisory denial of service kernel update heap overflow Ubuntu 18.04 device driver

Update Instructions

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

Ubuntu 18.04 LTS:
  linux-image-5.0.0-1021-gcp      5.0.0-1021.21~18.04.1
  linux-image-5.0.0-1023-azure    5.0.0-1023.24~18.04.1
  linux-image-5.0.0-1023-gke      5.0.0-1023.23~18.04.2
  linux-image-5.0.0-32-generic    5.0.0-32.34~18.04.2
  linux-image-5.0.0-32-generic-lpae  5.0.0-32.34~18.04.2
  linux-image-5.0.0-32-lowlatency  5.0.0-32.34~18.04.2
  linux-image-azure               5.0.0.1023.33
  linux-image-gcp                 5.0.0.1021.26
  linux-image-generic-hwe-18.04   5.0.0.32.89
  linux-image-generic-lpae-hwe-18.04  5.0.0.32.89
  linux-image-gke-5.0             5.0.0.1023.12
  linux-image-lowlatency-hwe-18.04  5.0.0.32.89
  linux-image-snapdragon-hwe-18.04  5.0.0.32.89
  linux-image-virtual-hwe-18.04   5.0.0.32.89

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.