Ubuntu 16.04 LTS Security Advisory: 4527-1 Critical Kernel Issues

ubuntu

September 22, 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-raspi2: Linux kernel for Raspberry Pi (V8) systems

- linux-snapdragon: Linux kernel for Qualcomm Snapdragon processors- linux-lts-xenial: Linux hardware enablement kernel from Xenial for Trusty

Details:

It was discovered that the Conexant 23885 TV card device driver for the

Linux kernel did not properly deallocate memory in some error conditions. A

local attacker could use this to cause a denial of service (memory

exhaustion). (CVE-2019-19054)

It was discovered that the Atheros HTC based wireless driver in the Linux

kernel did not properly deallocate in certain error conditions. A local

attacker could use this to cause a denial of service (memory exhaustion).

(CVE-2019-19073, CVE-2019-19074)

Yue Haibing discovered that the Linux kernel did not properly handle

reference counting in sysfs for network devices i...

Read the Full Advisory

Topics Covered

security advisory denial of service ubuntu memory exhaustion system crash linux kernel F2FS

Update Instructions

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

Ubuntu 16.04 LTS:
  linux-image-4.4.0-1114-aws      4.4.0-1114.127
  linux-image-4.4.0-1139-raspi2   4.4.0-1139.148
  linux-image-4.4.0-1143-snapdragon  4.4.0-1143.152
  linux-image-4.4.0-190-generic   4.4.0-190.220
  linux-image-4.4.0-190-generic-lpae  4.4.0-190.220
  linux-image-4.4.0-190-lowlatency  4.4.0-190.220
  linux-image-4.4.0-190-powerpc-e500mc  4.4.0-190.220
  linux-image-4.4.0-190-powerpc-smp  4.4.0-190.220
  linux-image-4.4.0-190-powerpc64-emb  4.4.0-190.220
  linux-image-4.4.0-190-powerpc64-smp  4.4.0-190.220
  linux-image-aws                 4.4.0.1114.119
  linux-image-generic             4.4.0.190.196
  linux-image-generic-lpae        4.4.0.190.196
  linux-image-lowlatency          4.4.0.190.196
  linux-image-powerpc-e500mc      4.4.0.190.196
  linux-image-powerpc-smp         4.4.0.190.196
  linux-image-powerpc64-emb       4.4.0.190.196
  linux-image-powerpc64-smp       4.4.0.190.196
  linux-image-raspi2              4.4.0.1139.139
  linux-image-snapdragon          4.4.0.1143.135
  linux-image-virtual             4.4.0.190.196

Ubuntu 14.04 ESM:
  linux-image-4.4.0-1078-aws      4.4.0-1078.82
  linux-image-4.4.0-190-generic   4.4.0-190.220~14.04.1
  linux-image-4.4.0-190-generic-lpae  4.4.0-190.220~14.04.1
  linux-image-4.4.0-190-lowlatency  4.4.0-190.220~14.04.1
  linux-image-4.4.0-190-powerpc-e500mc  4.4.0-190.220~14.04.1
  linux-image-4.4.0-190-powerpc-smp  4.4.0-190.220~14.04.1
  linux-image-4.4.0-190-powerpc64-emb  4.4.0-190.220~14.04.1
  linux-image-4.4.0-190-powerpc64-smp  4.4.0-190.220~14.04.1
  linux-image-aws                 4.4.0.1078.75
  linux-image-generic-lpae-lts-xenial  4.4.0.190.166
  linux-image-generic-lts-xenial  4.4.0.190.166
  linux-image-lowlatency-lts-xenial  4.4.0.190.166
  linux-image-powerpc-e500mc-lts-xenial  4.4.0.190.166
  linux-image-powerpc-smp-lts-xenial  4.4.0.190.166
  linux-image-powerpc64-emb-lts-xenial  4.4.0.190.166
  linux-image-powerpc64-smp-lts-xenial  4.4.0.190.166
  linux-image-virtual-lts-xenial  4.4.0.190.166

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.