USN-4486-1: Linux kernel vulnerability

Releases

• Ubuntu 16.04 ESM
• Ubuntu 14.04 ESM

Packages

• linux - Linux kernel
• linux-aws - Linux kernel for Amazon Web Services (AWS) systems
• linux-kvm - Linux kernel for cloud environments
• linux-lts-xenial - Linux hardware enablement kernel from Xenial for Trusty
• linux-raspi2 - Linux kernel for Raspberry Pi (V8) systems
• linux-snapdragon - Linux kernel for Qualcomm Snapdragon processors

Details

Wen Xu discovered that the XFS filesystem implementation in the Linux
kernel did not properly validate meta-data information. An attacker could
use this to construct a malicious xfs image that, when mounted, could cause
a denial of service (system crash).

Update instructions

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

Ubuntu 16.04

• linux-image-4.4.0-1079-kvm - 4.4.0-1079.86
• linux-image-4.4.0-1113-aws - 4.4.0-1113.126
• linux-image-4.4.0-1138-raspi2 - 4.4.0-1138.147
• linux-image-4.4.0-1142-snapdragon - 4.4.0-1142.151
• linux-image-4.4.0-189-generic - 4.4.0-189.219
• linux-image-4.4.0-189-generic-lpae - 4.4.0-189.219
• linux-image-4.4.0-189-lowlatency - 4.4.0-189.219
• linux-image-4.4.0-189-powerpc-e500mc - 4.4.0-189.219
• linux-image-4.4.0-189-powerpc-smp - 4.4.0-189.219
• linux-image-4.4.0-189-powerpc64-emb - 4.4.0-189.219
• linux-image-4.4.0-189-powerpc64-smp - 4.4.0-189.219
• linux-image-aws - 4.4.0.1113.118
• linux-image-generic - 4.4.0.189.195
• linux-image-generic-lpae - 4.4.0.189.195
• linux-image-kvm - 4.4.0.1079.77
• linux-image-lowlatency - 4.4.0.189.195
• linux-image-powerpc-e500mc - 4.4.0.189.195
• linux-image-powerpc-smp - 4.4.0.189.195
• linux-image-powerpc64-emb - 4.4.0.189.195
• linux-image-powerpc64-smp - 4.4.0.189.195
• linux-image-raspi2 - 4.4.0.1138.138
• linux-image-snapdragon - 4.4.0.1142.134
• linux-image-virtual - 4.4.0.189.195

Ubuntu 14.04

• linux-image-4.4.0-1077-aws - 4.4.0-1077.81
• linux-image-4.4.0-189-generic - 4.4.0-189.219~14.04.1
• linux-image-4.4.0-189-generic-lpae - 4.4.0-189.219~14.04.1
• linux-image-4.4.0-189-lowlatency - 4.4.0-189.219~14.04.1
• linux-image-4.4.0-189-powerpc-e500mc - 4.4.0-189.219~14.04.1
• linux-image-4.4.0-189-powerpc-smp - 4.4.0-189.219~14.04.1
• linux-image-4.4.0-189-powerpc64-emb - 4.4.0-189.219~14.04.1
• linux-image-4.4.0-189-powerpc64-smp - 4.4.0-189.219~14.04.1
• linux-image-aws - 4.4.0.1077.74
• linux-image-generic-lpae-lts-xenial - 4.4.0.189.165
• linux-image-generic-lts-xenial - 4.4.0.189.165
• linux-image-lowlatency-lts-xenial - 4.4.0.189.165
• linux-image-powerpc-e500mc-lts-xenial - 4.4.0.189.165
• linux-image-powerpc-smp-lts-xenial - 4.4.0.189.165
• linux-image-powerpc64-emb-lts-xenial - 4.4.0.189.165
• linux-image-powerpc64-smp-lts-xenial - 4.4.0.189.165
• linux-image-virtual-lts-xenial - 4.4.0.189.165

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

• CVE-2018-10323

Related notices

• USN-3752-2: linux-image-4.15.0-33-lowlatency, linux-image-4.15.0-33-generic, linux-image-unsigned-4.15.0-33-generic, linux-image-4.15.0-33-generic-lpae, linux-image-unsigned-4.15.0-33-lowlatency, linux-hwe
• USN-3752-1: linux-aws, linux-image-4.15.0-33-lowlatency, linux, linux-image-unsigned-4.15.0-1018-gcp, linux-raspi2, linux-image-4.15.0-1020-kvm, linux-image-4.15.0-1021-raspi2, linux-image-4.15.0-33-snapdragon, linux-image-4.15.0-33-generic, linux-image-4.15.0-33-generic-lpae, linux-gcp, linux-image-unsigned-4.15.0-33-generic, linux-image-unsigned-4.15.0-33-lowlatency, linux-kvm, linux-image-4.15.0-1020-aws
• USN-3752-3: linux-image-unsigned-4.15.0-1017-oem, linux-oem, linux-azure, linux-image-unsigned-4.15.0-1018-gcp, linux-image-unsigned-4.15.0-1022-azure, linux-gcp
• USN-3754-1: linux-image-3.13.0-157-generic, linux-image-3.13.0-157-powerpc64-smp, linux, linux-image-3.13.0-157-powerpc-e500mc, linux-image-3.13.0-157-powerpc-e500, linux-image-3.13.0-157-lowlatency, linux-image-3.13.0-157-generic-lpae, linux-image-3.13.0-157-powerpc64-emb, linux-image-3.13.0-157-powerpc-smp, linux-image-extra-3.13.0-157-generic