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USN-4346-1: Linux kernel vulnerabilities

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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:

Summary

Several security issues were fixed in the Linux kernel.

Software Description

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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