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USN-3035-1: Linux kernel vulnerability

14 July 2016

The system could be made to crash under certain conditions.

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Releases

Packages

Details

Jan Stancek discovered that the Linux kernel's memory manager did not
properly handle moving pages mapped by the asynchronous I/O (AIO) ring
buffer to the other nodes. A local attacker could use this to cause a
denial of service (system crash).

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Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

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Update instructions

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

Ubuntu 15.10

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

Related notices

  • USN-3035-3: linux-image-4.2.0-42-powerpc-smp, linux-image-4.2.0-42-lowlatency, linux-image-4.2.0-42-powerpc64-smp, linux-lts-wily, linux-image-4.2.0-42-powerpc-e500mc, linux-image-4.2.0-42-generic, linux-image-extra-4.2.0-42-generic, linux-image-4.2.0-42-powerpc64-emb, linux-image-4.2.0-42-generic-lpae
  • USN-3037-1: linux-image-3.19.0-65-powerpc-e500mc, linux-image-3.19.0-65-lowlatency, linux-image-3.19.0-65-powerpc-smp, linux-image-3.19.0-65-generic, linux-image-3.19.0-65-powerpc64-emb, linux-image-3.19.0-65-powerpc64-smp, linux-lts-vivid, linux-image-3.19.0-65-generic-lpae, linux-image-extra-3.19.0-65-generic
  • USN-3034-1: linux-image-3.13.0-92-powerpc-smp, linux-image-3.13.0-92-powerpc-e500, linux, linux-image-3.13.0-92-powerpc64-smp, linux-image-3.13.0-92-powerpc64-emb, linux-image-3.13.0-92-generic, linux-image-3.13.0-92-powerpc-e500mc, linux-image-3.13.0-92-generic-lpae, linux-image-extra-3.13.0-92-generic, linux-image-3.13.0-92-lowlatency
  • USN-3034-2: linux-image-3.13.0-92-generic-lpae, linux-lts-trusty, linux-image-3.13.0-92-generic
  • USN-3035-2: linux-image-4.2.0-1034-raspi2, linux-raspi2
  • USN-3036-1: linux-lts-utopic, linux-image-3.16.0-77-powerpc-e500mc, linux-image-3.16.0-77-generic-lpae, linux-image-extra-3.16.0-77-generic, linux-image-3.16.0-77-powerpc64-emb, linux-image-3.16.0-77-lowlatency, linux-image-3.16.0-77-generic, linux-image-3.16.0-77-powerpc64-smp, linux-image-3.16.0-77-powerpc-smp

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