1. Ubuntu Security Notices
  2. USN-3209-1

USN-3209-1: Linux kernel vulnerabilities

Publication date

22 February 2017

Overview

Several security issues were fixed in the kernel.

Releases

Packages

Details

It was discovered that the generic SCSI block layer in the Linux kernel did
not properly restrict write operations in certain situations. A local
attacker could use this to cause a denial of service (system crash) or
possibly gain administrative privileges. (CVE-2016-10088)

Jim Mattson discovered that the KVM implementation in the Linux kernel
mismanages the #BP and #OF exceptions. A local attacker in a guest virtual
machine could use this to cause a denial of service (guest OS crash).
(CVE-2016-9588)

Andrey Konovalov discovered a use-after-free vulnerability in the DCCP
implementation in the Linux kernel. A local attacker could use this to
cause a denial of service (system crash) or possibly gain administrative
privileges. (CVE-2017-6074)

It was discovered that the generic SCSI block layer in the Linux kernel did
not properly restrict write operations in certain situations. A local
attacker could use this to cause a denial of service (system crash) or
possibly gain administrative privileges. (CVE-2016-10088)

Jim Mattson discovered that the KVM implementation in the Linux kernel
mismanages the #BP and #OF exceptions. A local attacker in a guest virtual
machine could use this to cause a denial of service (guest OS crash).
(CVE-2016-9588)

Andrey Konovalov discovered a use-after-free vulnerability in the DCCP
implementation in the Linux kernel. A local attacker could use this to
cause a denial of service (system crash) or possibly gain administrative
privileges. (CVE-2017-6074)

Update instructions

After a standard system update you need to reboot your computer to make all the necessary changes.

Learn more about how to get the fixes.

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.

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

Ubuntu Release Package Version
16.10 yakkety linux-image-powerpc-smp –  4.8.0.39.50
linux-image-4.8.0-39-generic –  4.8.0-39.42
linux-image-4.8.0-39-generic-lpae –  4.8.0-39.42
linux-image-generic –  4.8.0.39.50
linux-image-powerpc-e500mc –  4.8.0.39.50
linux-image-lowlatency –  4.8.0.39.50
linux-image-4.8.0-39-lowlatency –  4.8.0-39.42
linux-image-4.8.0-39-powerpc-smp –  4.8.0-39.42
linux-image-generic-lpae –  4.8.0.39.50
linux-image-4.8.0-1026-raspi2 –  4.8.0-1026.29
linux-image-4.8.0-39-powerpc64-emb –  4.8.0-39.42
linux-image-powerpc64-emb –  4.8.0.39.50
linux-image-raspi2 –  4.8.0.1026.29
linux-image-4.8.0-39-powerpc-e500mc –  4.8.0-39.42

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References

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