USN-4346-1: Linux kernel vulnerabilities

linux, linux-aws, linux-kvm, linux-lts-xenial, linux-raspi2, linux-snapdragon vulnerabilities

A security issue affects these releases of Ubuntu and its derivatives:

Ubuntu 16.04 LTS
Ubuntu 14.04 ESM

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-kvm – Linux kernel for cloud environments
linux-raspi2 – Linux kernel for Raspberry Pi 2
linux-snapdragon – Linux kernel for Snapdragon processors
linux-lts-xenial – Linux hardware enablement kernel from Xenial for Trusty

Details

It was discovered that the QLogic Fibre Channel driver in the Linux kernel
did not properly check for error, leading to a NULL pointer dereference. A
local attacker could possibly use this to cause a denial of service (system
crash). (CVE-2019-16233)

It was discovered that the Intel Wi-Fi driver in the Linux kernel did not
properly check for errors in some situations. A local attacker could
possibly use this to cause a denial of service (system crash).
(CVE-2019-16234)

Tristan Madani discovered that the block I/O tracing implementation in the
Linux kernel contained a race condition. A local attacker could use this to
cause a denial of service (system crash) or possibly expose sensitive
information. (CVE-2019-19768)

It was discovered that the virtual terminal implementation in the Linux
kernel contained a race condition. A local attacker could possibly use this
to cause a denial of service (system crash) or expose sensitive
information. (CVE-2020-8648)

Jordy Zomer discovered that the floppy driver in the Linux kernel did not
properly check for errors in some situations. A local attacker could
possibly use this to cause a denial of service (system crash) or possibly
expose sensitive information. (CVE-2020-9383)

Update instructions

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

Ubuntu 16.04 LTS: linux-image-4.4.0-1070-kvm – 4.4.0-1070.77; linux-image-4.4.0-1106-aws – 4.4.0-1106.117; linux-image-4.4.0-1132-raspi2 – 4.4.0-1132.141; linux-image-4.4.0-1136-snapdragon – 4.4.0-1136.144; linux-image-4.4.0-178-generic – 4.4.0-178.208; linux-image-4.4.0-178-generic-lpae – 4.4.0-178.208; linux-image-4.4.0-178-lowlatency – 4.4.0-178.208; linux-image-4.4.0-178-powerpc-e500mc – 4.4.0-178.208; linux-image-4.4.0-178-powerpc-smp – 4.4.0-178.208; linux-image-4.4.0-178-powerpc64-emb – 4.4.0-178.208; linux-image-4.4.0-178-powerpc64-smp – 4.4.0-178.208; linux-image-aws – 4.4.0.1106.110; linux-image-generic – 4.4.0.178.186; linux-image-generic-lpae – 4.4.0.178.186; linux-image-kvm – 4.4.0.1070.70; linux-image-lowlatency – 4.4.0.178.186; linux-image-powerpc-e500mc – 4.4.0.178.186; linux-image-powerpc-smp – 4.4.0.178.186; linux-image-powerpc64-emb – 4.4.0.178.186; linux-image-powerpc64-smp – 4.4.0.178.186; linux-image-raspi2 – 4.4.0.1132.132; linux-image-snapdragon – 4.4.0.1136.128; linux-image-virtual – 4.4.0.178.186
Ubuntu 14.04 ESM: linux-image-4.4.0-1066-aws – 4.4.0-1066.70; linux-image-4.4.0-178-generic – 4.4.0-178.208~14.04.1; linux-image-4.4.0-178-lowlatency – 4.4.0-178.208~14.04.1; linux-image-aws – 4.4.0.1066.67; linux-image-generic-lts-xenial – 4.4.0.178.157; linux-image-lowlatency-lts-xenial – 4.4.0.178.157; linux-image-virtual-lts-xenial – 4.4.0.178.157

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

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.

References

Source: USN-4346-1: Linux kernel vulnerabilities

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