USN-3630-1: Linux kernel vulnerability

23 April 2018

The system could be made to crash under certain conditions.

Releases

Packages

  • linux - Linux kernel
  • linux-raspi2 - Linux kernel for Raspberry Pi 2

Details

It was discovered that the Broadcom UniMAC MDIO bus controller driver in
the Linux kernel did not properly validate device resources. A local
attacker could use this to cause a denial of service (system crash).

Update instructions

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

Ubuntu 17.10

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-3619-1: linux-image-4.4.0-119-powerpc-smp, linux-image-generic-lpae, linux, linux-image-4.4.0-1020-kvm, linux-image-kvm, linux-image-4.4.0-119-powerpc64-smp, linux-image-powerpc-smp, linux-aws, linux-image-4.4.0-119-generic, linux-image-powerpc64-emb, linux-snapdragon, linux-image-4.4.0-119-powerpc-e500mc, linux-raspi2, linux-image-4.4.0-119-lowlatency, linux-image-powerpc-e500mc, linux-image-4.4.0-1054-aws, linux-image-raspi2, linux-kvm, linux-image-generic, linux-image-4.4.0-119-powerpc64-emb, linux-image-powerpc64-smp, linux-image-aws, linux-image-snapdragon, linux-image-4.4.0-119-generic-lpae, linux-image-4.4.0-1088-snapdragon, linux-image-4.4.0-1086-raspi2, linux-image-lowlatency
  • USN-3619-2: linux-image-4.4.0-1016-aws, linux-image-4.4.0-119-generic-lpae, linux-image-4.4.0-119-powerpc-smp, linux-image-lowlatency-lts-xenial, linux-image-powerpc64-emb-lts-xenial, linux-lts-xenial, linux-image-powerpc64-smp-lts-xenial, linux-image-powerpc-smp-lts-xenial, linux-image-generic-lpae-lts-xenial, linux-image-4.4.0-119-powerpc-e500mc, linux-image-powerpc-e500mc-lts-xenial, linux-image-4.4.0-119-powerpc64-emb, linux-image-4.4.0-119-lowlatency, linux-image-aws, linux-image-4.4.0-119-powerpc64-smp, linux-image-generic-lts-xenial, linux-aws, linux-image-4.4.0-119-generic
  • USN-3630-2: linux-hwe, linux-image-generic-lpae-hwe-16.04, linux-image-4.13.0-39-lowlatency, linux-image-gcp, linux-image-4.13.0-1024-oem, linux-image-4.13.0-39-generic, linux-image-oem, linux-oem, linux-image-generic-hwe-16.04, linux-image-gke, linux-image-4.13.0-39-generic-lpae, linux-gcp, linux-image-lowlatency-hwe-16.04, linux-image-4.13.0-1013-gcp
  • USN-3632-1: linux-azure, linux-image-azure, linux-image-4.13.0-1014-azure