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USN-3128-2: Linux kernel (Xenial HWE) vulnerability

11 November 2016

The system could be made to crash under certain conditions.

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Releases

Packages

Details

USN-3128-1 fixed vulnerabilities in the Linux kernel for Ubuntu 16.04
LTS. This update provides the corresponding updates for the Linux
Hardware Enablement (HWE) kernel from Ubuntu 16.04 LTS for Ubuntu
14.04 LTS.

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).

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 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-3127-1: linux-image-3.13.0-101-lowlatency, linux-image-3.13.0-101-powerpc-e500, linux-image-3.13.0-101-powerpc64-smp, linux-image-3.13.0-101-powerpc64-emb, linux-image-3.13.0-101-generic, linux-image-3.13.0-101-generic-lpae, linux-image-3.13.0-101-powerpc-e500mc, linux-image-3.13.0-101-powerpc-smp, linux-image-extra-3.13.0-101-generic, linux
  • USN-3127-2: linux-image-generic-lpae-lts-trusty, linux-image-3.13.0-101-generic, linux-image-3.13.0-101-generic-lpae, linux-image-generic-lts-trusty, linux-lts-trusty
  • USN-3126-1: linux-image-3.2.0-115-generic, linux-image-3.2.0-115-generic-pae, linux-image-3.2.0-115-highbank, linux-image-generic, linux-image-3.2.0-115-powerpc64-smp, linux-image-generic-pae, linux-image-powerpc, linux-image-omap, linux-image-highbank, linux-image-powerpc-smp, linux-image-3.2.0-115-powerpc-smp, linux-image-3.2.0-115-virtual, linux-image-powerpc64-smp, linux-image-virtual, linux-image-3.2.0-115-omap, linux
  • USN-3126-2: linux-ti-omap4, linux-image-3.2.0-1493-omap4, linux-image-omap4
  • USN-3161-3: linux-raspi2, linux-image-4.4.0-1038-raspi2
  • USN-3129-1: linux-image-generic, linux-image-4.8.0-27-generic, linux-image-4.8.0-27-powerpc64-emb, linux-image-lowlatency, linux-image-powerpc64-emb, linux-image-4.8.0-27-generic-lpae, linux-image-generic-lpae, linux-image-powerpc-smp, linux-image-4.8.0-27-powerpc-smp, linux-image-4.8.0-27-powerpc-e500mc, linux-image-powerpc-e500mc, linux-image-powerpc64-smp, linux-image-4.8.0-27-lowlatency, linux-image-virtual, linux
  • USN-3129-2: linux-raspi2, linux-image-raspi2, linux-image-4.8.0-1018-raspi2
  • USN-3128-1: linux-image-extra-4.4.0-47-generic, linux-image-4.4.0-47-generic, linux-image-4.4.0-47-generic-lpae, linux-image-4.4.0-47-powerpc64-smp, linux-image-4.4.0-47-powerpc-smp, linux-image-4.4.0-47-powerpc-e500mc, linux-image-4.4.0-47-powerpc64-emb, linux-image-4.4.0-47-lowlatency, linux
  • USN-3128-3: linux-image-4.4.0-1035-snapdragon, linux-snapdragon