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Ubuntu 16.04 LTS USN-3106-1 Moderate: Linux Kernel Race Condition

ubuntu
Calendar Grey October 20, 2016
Scroller Ubuntu
Debian Security Bulletin DSA-4732-1 highlights a vulnerability in the kernel which may permit unauthorized local access. Important update needed!
The system could be made to run programs as an administrator.

Summary

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

Software Description:

- linux: Linux kernel

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.

Topics%20covered

Topics Covered

security advisory moderate severity race condition system update ubuntu administrative access linux kernel

Update Instructions

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

Ubuntu 16.04 LTS:
  linux-image-4.4.0-45-generic    4.4.0-45.66
  linux-image-4.4.0-45-generic-lpae  4.4.0-45.66
  linux-image-4.4.0-45-lowlatency  4.4.0-45.66
  linux-image-4.4.0-45-powerpc-e500mc  4.4.0-45.66
  linux-image-4.4.0-45-powerpc-smp  4.4.0-45.66
  linux-image-4.4.0-45-powerpc64-emb  4.4.0-45.66
  linux-image-4.4.0-45-powerpc64-smp  4.4.0-45.66

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

https://ubuntu.com/security/notices/USN-3106-1

CVE-2016-5195

October 20, 2016

Topics%20covered

Topics Covered

security advisory moderate severity race condition system update ubuntu administrative access linux kernel

Package Information

https://launchpad.net/ubuntu/+source/linux/4.4.0-45.66

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