Your submission was sent successfully! Close

Thank you for contacting us. A member of our team will be in touch shortly. Close

You have successfully unsubscribed! Close

Thank you for signing up for our newsletter!
In these regular emails you will find the latest updates about Ubuntu and upcoming events where you can meet our team.Close

USN-2842-1: Linux kernel vulnerabilities

17 December 2015

Several security issues were fixed in the kernel.

Reduce your security exposure

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.

Learn more about Ubuntu Pro

Releases

Packages

Details

Jan Beulich discovered that the KVM svm hypervisor implementation in the
Linux kernel did not properly catch Debug exceptions on AMD processors. An
attacker in a guest virtual machine could use this to cause a denial of
service (system crash) in the host OS. (CVE-2015-8104)

郭永刚 discovered that the ppp implementation in the Linux kernel did
not ensure that certain slot numbers are valid. A local attacker with the
privilege to call ioctl() on /dev/ppp could cause a denial of service
(system crash). (CVE-2015-7799)

It was discovered that the virtual video osd test driver in the Linux
kernel did not properly initialize data structures. A local attacker could
use this to obtain sensitive information from the kernel. (CVE-2015-7884)

It was discovered that the driver for Digi Neo and ClassicBoard devices did
not properly initialize data structures. A local attacker could use this to
obtain sensitive information from the kernel. (CVE-2015-7885)

Reduce your security exposure

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.

Learn more about Ubuntu Pro

Update instructions

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

Ubuntu 15.04

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. If
you use linux-restricted-modules, you have to update that package as
well to get modules which work with the new kernel version. Unless you
manually uninstalled the standard kernel metapackages (e.g. linux-generic,
linux-server, linux-powerpc), a standard system upgrade will automatically
perform this as well.

References

Related notices

  • USN-2843-2: linux-image-4.2.0-21-powerpc-smp, linux-image-extra-4.2.0-21-generic, linux-image-4.2.0-21-generic-lpae, linux-image-4.2.0-21-powerpc64-emb, linux-image-4.2.0-21-lowlatency, linux-image-4.2.0-21-powerpc-e500mc, linux-image-4.2.0-21-powerpc64-smp, linux-image-4.2.0-21-generic, linux-lts-wily
  • USN-2842-2: linux-image-3.19.0-41-lowlatency, linux-image-3.19.0-41-powerpc-e500mc, linux-image-3.19.0-41-powerpc-smp, linux-image-3.19.0-41-generic-lpae, linux-image-3.19.0-41-powerpc64-emb, linux-image-3.19.0-41-generic, linux-image-extra-3.19.0-41-generic, linux-image-3.19.0-41-powerpc64-smp, linux-lts-vivid
  • USN-2844-1: linux-image-3.16.0-56-generic, linux-image-extra-3.16.0-56-generic, linux-image-3.16.0-56-powerpc64-smp, linux-image-3.16.0-56-generic-lpae, linux-image-3.16.0-56-powerpc64-emb, linux-image-3.16.0-56-powerpc-smp, linux-image-3.16.0-56-lowlatency, linux-image-3.16.0-56-powerpc-e500mc, linux-lts-utopic
  • USN-2886-2: linux-ti-omap4, linux-image-3.2.0-1476-omap4
  • USN-2886-1: linux, linux-image-3.2.0-98-highbank, linux-image-3.2.0-98-generic, linux-image-3.2.0-98-omap, linux-image-3.2.0-98-powerpc64-smp, linux-image-3.2.0-98-generic-pae, linux-image-3.2.0-98-powerpc-smp, linux-image-3.2.0-98-virtual
  • USN-2841-1: linux, linux-image-3.13.0-73-powerpc-smp, linux-image-3.13.0-73-powerpc-e500mc, linux-image-3.13.0-73-generic-lpae, linux-image-3.13.0-73-lowlatency, linux-image-extra-3.13.0-73-generic, linux-image-3.13.0-73-powerpc64-emb, linux-image-3.13.0-73-generic, linux-image-3.13.0-73-powerpc64-smp, linux-image-3.13.0-73-powerpc-e500
  • USN-2841-2: linux-image-3.13.0-73-generic, linux-image-3.13.0-73-generic-lpae, linux-lts-trusty
  • USN-2843-1: linux, linux-image-4.2.0-21-powerpc-smp, linux-image-4.2.0-21-generic-lpae, linux-image-4.2.0-21-powerpc64-emb, linux-image-4.2.0-21-lowlatency, linux-image-4.2.0-21-powerpc-e500mc, linux-image-4.2.0-21-powerpc64-smp, linux-image-4.2.0-21-generic
  • USN-2843-3: linux-raspi2, linux-image-4.2.0-1016-raspi2
  • USN-2840-1: linux, linux-image-3.2.0-96-generic-pae, linux-image-3.2.0-96-powerpc64-smp, linux-image-3.2.0-96-generic, linux-image-3.2.0-96-omap, linux-image-3.2.0-96-highbank, linux-image-3.2.0-96-powerpc-smp, linux-image-3.2.0-96-virtual

Join the discussion

Need help with your security needs?

Ubuntu Pro provides up to ten-year security coverage for over 23,000 open-source packages within the Ubuntu Main and Universe repositories.

Talk to an expert to find out what would work best for you

Further reading