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USN-3105-1: Linux kernel vulnerability

20 October 2016

The system could be made to run programs as an administrator.

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Releases

Packages

Details

It was discovered that a race condition existed in the memory manager of
the Linux kernel when handling copy-on-write breakage of private read-only
memory mappings. A local attacker could use this to gain administrative
privileges.

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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 14.04

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-3106-2: linux-image-4.4.0-45-generic-lpae, linux-image-4.4.0-45-powerpc64-emb, linux-image-4.4.0-45-powerpc-e500mc, linux-image-4.4.0-45-powerpc64-smp, linux-lts-xenial, linux-image-extra-4.4.0-45-generic, linux-image-4.4.0-45-generic, linux-image-4.4.0-45-powerpc-smp, linux-image-4.4.0-45-lowlatency
  • USN-3106-3: linux-raspi2, linux-image-4.4.0-1029-raspi2
  • USN-3106-1: linux-image-4.4.0-45-generic-lpae, linux-image-4.4.0-45-powerpc64-emb, linux-image-4.4.0-45-powerpc-e500mc, linux-image-4.4.0-45-powerpc64-smp, linux, linux-image-extra-4.4.0-45-generic, linux-image-4.4.0-45-generic, linux-image-4.4.0-45-powerpc-smp, linux-image-4.4.0-45-lowlatency
  • USN-3106-4: linux-snapdragon, linux-image-4.4.0-1032-snapdragon
  • USN-3105-2: linux-lts-trusty, linux-image-3.13.0-100-generic-lpae, linux-image-3.13.0-100-generic
  • USN-3107-1: linux-image-4.8.0-26-powerpc-e500mc, linux-image-4.8.0-26-lowlatency, linux, linux-image-4.8.0-26-powerpc64-emb, linux-image-4.8.0-26-generic, linux-image-4.8.0-26-powerpc-smp, linux-image-4.8.0-26-generic-lpae
  • USN-3107-2: linux-image-4.8.0-1017-raspi2, linux-raspi2
  • USN-3104-1: linux-image-3.2.0-113-highbank, linux-image-3.2.0-113-omap, linux, linux-image-3.2.0-113-powerpc-smp, linux-image-3.2.0-113-generic, linux-image-3.2.0-113-generic-pae, linux-image-3.2.0-113-virtual, linux-image-3.2.0-113-powerpc64-smp
  • USN-3104-2: linux-ti-omap4, linux-image-3.2.0-1491-omap4

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Further reading