1. Ubuntu Security Notices
  2. USN-3206-1

USN-3206-1: Linux kernel vulnerabilities

Publication date

22 February 2017

Overview

Several security issues were fixed in the kernel.

Releases

Packages

Details

It was discovered that a use-after-free vulnerability existed in the block
device layer of the Linux kernel. A local attacker could use this to cause
a denial of service (system crash) or possibly gain administrative
privileges. (CVE-2016-7910)

Dmitry Vyukov discovered a use-after-free vulnerability in the
sys_ioprio_get() function in the Linux kernel. A local attacker could
use this to cause a denial of service (system crash) or possibly gain
administrative privileges. (CVE-2016-7911)

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 a use-after-free vulnerability existed in the block
device layer of the Linux kernel. A local attacker could use this to cause
a denial of service (system crash) or possibly gain administrative
privileges. (CVE-2016-7910)

Dmitry Vyukov discovered a use-after-free vulnerability in the
sys_ioprio_get() function in the Linux kernel. A local attacker could
use this to cause a denial of service (system crash) or possibly gain
administrative privileges. (CVE-2016-7911)

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
12.04 precise linux-image-3.2.0-1501-omap4 –  3.2.0-1501.128
linux-image-powerpc-smp –  3.2.0.123.138
linux-image-3.2.0-123-powerpc64-smp –  3.2.0-123.166
linux-image-3.2.0-123-generic-pae –  3.2.0-123.166
linux-image-3.2.0-123-highbank –  3.2.0-123.166
linux-image-3.2.0-123-generic –  3.2.0-123.166
linux-image-omap4 –  3.2.0.1501.96
linux-image-3.2.0-123-virtual –  3.2.0-123.166
linux-image-generic –  3.2.0.123.138
linux-image-generic-pae –  3.2.0.123.138
linux-image-highbank –  3.2.0.123.138
linux-image-3.2.0-123-powerpc-smp –  3.2.0-123.166
linux-image-virtual –  3.2.0.123.138
linux-image-powerpc64-smp –  3.2.0.123.138
linux-image-omap –  3.2.0.123.138
linux-image-3.2.0-123-omap –  3.2.0-123.166

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References

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