Your submission was sent successfully! Close

USN-4135-2: Linux kernel vulnerabilities

18 September 2019

Several security issues were fixed in the Linux kernel.

Releases

Packages

  • linux - Linux kernel
  • linux-aws - Linux kernel for Amazon Web Services (AWS) systems
  • linux-azure - Linux kernel for Microsoft Azure Cloud systems
  • linux-lts-trusty - Linux hardware enablement kernel from Trusty for Precise ESM
  • linux-lts-xenial - Linux hardware enablement kernel from Xenial for Trusty

Details

Peter Pi discovered a buffer overflow in the virtio network backend
(vhost_net) implementation in the Linux kernel. An attacker in a guest may
be able to use this to cause a denial of service (host OS crash) or
possibly execute arbitrary code in the host OS. (CVE-2019-14835)

It was discovered that the Linux kernel on PowerPC architectures did not
properly handle Facility Unavailable exceptions in some situations. A local
attacker could use this to expose sensitive information. (CVE-2019-15030)

It was discovered that the Linux kernel on PowerPC architectures did not
properly handle exceptions on interrupts in some situations. A local
attacker could use this to expose sensitive information. (CVE-2019-15031)

Update instructions

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

Ubuntu 14.04
Ubuntu 12.04

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.

Related notices

  • USN-4135-1: linux-gke-4.15, linux-image-powerpc64-smp-lts-wily, linux-image-5.0.0-29-lowlatency, linux-image-powerpc-smp-lts-xenial, linux-image-4.15.0-1050-aws, linux-image-4.4.0-164-generic-lpae, linux-image-lowlatency-hwe-16.04-edge, linux-kvm, linux-gke-5.0, linux-image-gke, linux-image-4.15.0-64-lowlatency, linux-image-4.15.0-64-generic, linux-image-generic-lts-wily, linux-image-4.15.0-1025-oracle, linux-image-generic-hwe-16.04, linux-aws-hwe, linux-azure, linux-image-5.0.0-1017-kvm, linux-image-5.0.0-1016-aws, linux-image-4.15.0-1047-raspi2, linux-image-4.15.0-1064-snapdragon, linux-image-4.4.0-164-powerpc-smp, linux-image-4.15.0-1044-gcp, linux-image-5.0.0-1021-snapdragon, linux-image-4.4.0-1058-kvm, linux-image-4.15.0-1046-kvm, linux-image-lowlatency, linux-image-gke-4.15, linux-image-virtual, linux-image-powerpc64-emb, linux-image-powerpc-e500mc-lts-wily, linux-image-virtual-hwe-16.04-edge, linux-image-4.4.0-1126-snapdragon, linux-image-4.4.0-164-powerpc-e500mc, linux-image-virtual-hwe-18.04, linux-image-azure, linux-image-powerpc-smp-lts-utopic, linux-image-lowlatency-hwe-16.04, linux-image-virtual-lts-xenial, linux-image-generic-lpae-lts-vivid, linux-image-oracle, linux-snapdragon, linux-image-powerpc-smp-lts-wily, linux-image-generic-lpae-lts-xenial, linux-image-powerpc64-smp-lts-utopic, linux-image-lowlatency-lts-utopic, linux-image-5.0.0-1017-gke, linux-image-snapdragon, linux-image-powerpc-smp-lts-vivid, linux-image-virtual-lts-utopic, linux-image-powerpc64-emb-lts-utopic, linux-image-5.0.0-1017-gcp, linux-image-5.0.0-29-generic, linux-gcp, linux-image-5.0.0-29-generic-lpae, linux-image-generic-lts-utopic, linux-image-powerpc64-emb-lts-wily, linux-image-generic, linux-image-powerpc64-emb-lts-xenial, linux-image-generic-lpae-lts-utopic, linux-image-4.15.0-1059-azure, linux-image-4.4.0-164-lowlatency, linux-image-generic-lpae, linux-image-virtual-lts-wily, linux-image-powerpc64-smp-lts-vivid, linux-image-generic-hwe-16.04-edge, linux-image-lowlatency-lts-wily, linux-image-aws, linux-raspi2, linux-image-gcp, linux-image-generic-lts-xenial, linux-image-4.15.0-64-generic-lpae, linux-image-raspi2, linux-image-lowlatency-hwe-18.04, linux, linux-image-4.4.0-164-generic, linux-image-lowlatency-lts-xenial, linux-image-powerpc-e500mc-lts-xenial, linux-image-4.15.0-1044-gke, linux-hwe, linux-image-4.4.0-164-powerpc64-smp, linux-image-powerpc64-emb-lts-vivid, linux-image-powerpc-e500mc-lts-vivid, linux-image-generic-lpae-hwe-18.04, linux-image-generic-lpae-lts-wily, linux-image-generic-lpae-hwe-16.04, linux-image-powerpc-e500mc-lts-utopic, linux-image-4.4.0-164-powerpc64-emb, linux-image-powerpc64-smp, linux-image-4.4.0-1122-raspi2, linux-image-generic-hwe-18.04, linux-image-powerpc-e500mc, linux-image-4.4.0-1094-aws, linux-image-virtual-hwe-16.04, linux-image-lowlatency-lts-vivid, linux-image-5.0.0-1020-azure, linux-image-oem, linux-aws, linux-oem, linux-image-5.0.0-1017-raspi2, linux-image-generic-lts-vivid, linux-oracle, linux-image-gke-5.0, linux-image-snapdragon-hwe-18.04, linux-image-generic-lpae-hwe-16.04-edge, linux-image-aws-hwe, linux-image-powerpc-smp, linux-image-virtual-lts-vivid, linux-image-kvm, linux-image-powerpc64-smp-lts-xenial, linux-image-4.15.0-1056-oem