1. Ubuntu Security Notices
  2. USN-3128-1

USN-3128-1: Linux kernel vulnerability

Publication date

11 November 2016

Overview

The system could be made to crash under certain conditions.

Releases

Packages

Details

Ondrej Kozina discovered that the keyring interface in the Linux kernel
contained a buffer overflow when displaying timeout events via the
/proc/keys interface. A local attacker could use this to cause a denial of
service (system crash).

Ondrej Kozina discovered that the keyring interface in the Linux kernel
contained a buffer overflow when displaying timeout events via the
/proc/keys interface. A local attacker could use this to cause a denial of
service (system crash).

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
16.04 xenial linux-image-4.4.0-47-generic –  4.4.0-47.68
linux-image-4.4.0-47-generic-lpae –  4.4.0-47.68
linux-image-4.4.0-47-lowlatency –  4.4.0-47.68
linux-image-4.4.0-47-powerpc-e500mc –  4.4.0-47.68
linux-image-4.4.0-47-powerpc-smp –  4.4.0-47.68
linux-image-4.4.0-47-powerpc64-emb –  4.4.0-47.68
linux-image-4.4.0-47-powerpc64-smp –  4.4.0-47.68

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References

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