USN-4135-1: Linux kernel vulnerabilities

Releases

• Ubuntu 19.04
• Ubuntu 18.04 ESM
• Ubuntu 16.04 ESM

Packages

• linux - Linux kernel
• linux-aws - Linux kernel for Amazon Web Services (AWS) systems
• linux-aws-hwe - Linux kernel for Amazon Web Services (AWS-HWE) systems
• linux-azure - Linux kernel for Microsoft Azure Cloud systems
• linux-gcp - Linux kernel for Google Cloud Platform (GCP) systems
• linux-gke-4.15 - Linux kernel for Google Container Engine (GKE) systems
• linux-gke-5.0 - Linux kernel for Google Container Engine (GKE) systems
• linux-hwe - Linux hardware enablement (HWE) kernel
• linux-kvm - Linux kernel for cloud environments
• linux-oem - Linux kernel for OEM processors
• linux-oracle - Linux kernel for Oracle Cloud systems
• linux-raspi2 - Linux kernel for Raspberry Pi 2
• linux-snapdragon - Linux kernel for Snapdragon processors

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 19.04

• linux-image-5.0.0-1016-aws - 5.0.0-1016.18
• linux-image-5.0.0-1017-gcp - 5.0.0-1017.17
• linux-image-5.0.0-1017-kvm - 5.0.0-1017.18
• linux-image-5.0.0-1017-raspi2 - 5.0.0-1017.17
• linux-image-5.0.0-1020-azure - 5.0.0-1020.21
• linux-image-5.0.0-1021-snapdragon - 5.0.0-1021.22
• linux-image-5.0.0-29-generic - 5.0.0-29.31
• linux-image-5.0.0-29-generic-lpae - 5.0.0-29.31
• linux-image-5.0.0-29-lowlatency - 5.0.0-29.31
• linux-image-aws - 5.0.0.1016.17
• linux-image-azure - 5.0.0.1020.19
• linux-image-gcp - 5.0.0.1017.43
• linux-image-generic - 5.0.0.29.30
• linux-image-generic-lpae - 5.0.0.29.30
• linux-image-gke - 5.0.0.1017.43
• linux-image-kvm - 5.0.0.1017.17
• linux-image-lowlatency - 5.0.0.29.30
• linux-image-raspi2 - 5.0.0.1017.14
• linux-image-snapdragon - 5.0.0.1021.14
• linux-image-virtual - 5.0.0.29.30

Ubuntu 18.04

• linux-image-4.15.0-1025-oracle - 4.15.0-1025.28
• linux-image-4.15.0-1044-gcp - 4.15.0-1044.70
• linux-image-4.15.0-1044-gke - 4.15.0-1044.46
• linux-image-4.15.0-1046-kvm - 4.15.0-1046.46
• linux-image-4.15.0-1047-raspi2 - 4.15.0-1047.51
• linux-image-4.15.0-1050-aws - 4.15.0-1050.52
• linux-image-4.15.0-1056-oem - 4.15.0-1056.65
• linux-image-4.15.0-1064-snapdragon - 4.15.0-1064.71
• linux-image-4.15.0-64-generic - 4.15.0-64.73
• linux-image-4.15.0-64-generic-lpae - 4.15.0-64.73
• linux-image-4.15.0-64-lowlatency - 4.15.0-64.73
• linux-image-5.0.0-1017-gke - 5.0.0-1017.17~18.04.1
• linux-image-5.0.0-1020-azure - 5.0.0-1020.21~18.04.1
• linux-image-5.0.0-29-generic - 5.0.0-29.31~18.04.1
• linux-image-5.0.0-29-generic-lpae - 5.0.0-29.31~18.04.1
• linux-image-5.0.0-29-lowlatency - 5.0.0-29.31~18.04.1
• linux-image-aws - 4.15.0.1050.49
• linux-image-azure - 5.0.0.1020.30
• linux-image-gcp - 4.15.0.1044.70
• linux-image-generic - 4.15.0.64.66
• linux-image-generic-hwe-18.04 - 5.0.0.29.86
• linux-image-generic-lpae - 4.15.0.64.66
• linux-image-generic-lpae-hwe-18.04 - 5.0.0.29.86
• linux-image-gke - 4.15.0.1044.47
• linux-image-gke-4.15 - 4.15.0.1044.47
• linux-image-gke-5.0 - 5.0.0.1017.7
• linux-image-kvm - 4.15.0.1046.46
• linux-image-lowlatency - 4.15.0.64.66
• linux-image-lowlatency-hwe-18.04 - 5.0.0.29.86
• linux-image-oem - 4.15.0.1056.60
• linux-image-oracle - 4.15.0.1025.28
• linux-image-raspi2 - 4.15.0.1047.45
• linux-image-snapdragon - 4.15.0.1064.67
• linux-image-snapdragon-hwe-18.04 - 5.0.0.29.86
• linux-image-virtual - 4.15.0.64.66
• linux-image-virtual-hwe-18.04 - 5.0.0.29.86

Ubuntu 16.04

• linux-image-4.15.0-1025-oracle - 4.15.0-1025.28~16.04.1
• linux-image-4.15.0-1044-gcp - 4.15.0-1044.46
• linux-image-4.15.0-1050-aws - 4.15.0-1050.52~16.04.1
• linux-image-4.15.0-1059-azure - 4.15.0-1059.64
• linux-image-4.15.0-64-generic - 4.15.0-64.73~16.04.1
• linux-image-4.15.0-64-generic-lpae - 4.15.0-64.73~16.04.1
• linux-image-4.15.0-64-lowlatency - 4.15.0-64.73~16.04.1
• linux-image-4.4.0-1058-kvm - 4.4.0-1058.65
• linux-image-4.4.0-1094-aws - 4.4.0-1094.105
• linux-image-4.4.0-1122-raspi2 - 4.4.0-1122.131
• linux-image-4.4.0-1126-snapdragon - 4.4.0-1126.132
• linux-image-4.4.0-164-generic - 4.4.0-164.192
• linux-image-4.4.0-164-generic-lpae - 4.4.0-164.192
• linux-image-4.4.0-164-lowlatency - 4.4.0-164.192
• linux-image-4.4.0-164-powerpc-e500mc - 4.4.0-164.192
• linux-image-4.4.0-164-powerpc-smp - 4.4.0-164.192
• linux-image-4.4.0-164-powerpc64-emb - 4.4.0-164.192
• linux-image-4.4.0-164-powerpc64-smp - 4.4.0-164.192
• linux-image-aws - 4.4.0.1094.98
• linux-image-aws-hwe - 4.15.0.1050.50
• linux-image-azure - 4.15.0.1059.62
• linux-image-gcp - 4.15.0.1044.58
• linux-image-generic - 4.4.0.164.172
• linux-image-generic-hwe-16.04 - 4.15.0.64.84
• linux-image-generic-lpae - 4.4.0.164.172
• linux-image-generic-lpae-hwe-16.04 - 4.15.0.64.84
• linux-image-gke - 4.15.0.1044.58
• linux-image-kvm - 4.4.0.1058.58
• linux-image-lowlatency - 4.4.0.164.172
• linux-image-lowlatency-hwe-16.04 - 4.15.0.64.84
• linux-image-oem - 4.15.0.64.84
• linux-image-oracle - 4.15.0.1025.18
• linux-image-powerpc-e500mc - 4.4.0.164.172
• linux-image-powerpc-smp - 4.4.0.164.172
• linux-image-powerpc64-emb - 4.4.0.164.172
• linux-image-powerpc64-smp - 4.4.0.164.172
• linux-image-raspi2 - 4.4.0.1122.122
• linux-image-snapdragon - 4.4.0.1126.118
• linux-image-virtual - 4.4.0.164.172
• linux-image-virtual-hwe-16.04 - 4.15.0.64.84

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-2019-14835
• CVE-2019-15030
• CVE-2019-15031

Related notices

• USN-4135-2: linux-image-3.13.0-173-lowlatency, linux-aws, linux-image-generic-lpae-lts-trusty, linux-image-aws, linux-image-virtual, linux-image-azure, linux-image-powerpc-smp, linux-image-3.2.0-143-generic-pae, linux-image-powerpc-e500mc-lts-xenial, linux-lts-trusty, linux-image-3.13.0-173-generic-lpae, linux-image-powerpc, linux-image-highbank, linux-image-4.4.0-164-powerpc-smp, linux-image-3.13.0-173-powerpc-e500, linux-image-generic-lts-raring, linux-image-lowlatency, linux-image-4.4.0-164-powerpc-e500mc, linux-image-powerpc-smp-lts-xenial, linux-image-3.13.0-173-powerpc64-smp, linux-image-3.13.0-173-generic, linux, linux-image-generic-lts-xenial, linux-image-4.15.0-1059-azure, linux-image-4.4.0-164-lowlatency, linux-image-generic-lpae-lts-xenial, linux-image-server, linux-image-3.13.0-173-powerpc-e500mc, linux-lts-xenial, linux-image-3.2.0-143-highbank, linux-image-3.13.0-173-powerpc64-emb, linux-image-3.2.0-143-omap, linux-image-generic-lpae, linux-image-4.4.0-164-generic, linux-image-powerpc-e500, linux-image-generic-lts-trusty, linux-image-generic-lts-saucy, linux-image-3.2.0-143-powerpc-smp, linux-image-4.4.0-164-generic-lpae, linux-image-generic, linux-image-virtual-lts-xenial, linux-image-powerpc64-emb, linux-image-3.13.0-173-powerpc-smp, linux-image-lowlatency-pae, linux-image-lowlatency-lts-xenial, linux-image-generic-pae, linux-image-powerpc64-smp-lts-xenial, linux-image-generic-lts-quantal, linux-image-powerpc-e500mc, linux-image-3.2.0-143-virtual, linux-image-generic-lpae-lts-saucy, linux-azure, linux-image-3.2.0-143-generic, linux-image-powerpc64-emb-lts-xenial, linux-image-3.2.0-143-powerpc64-smp, linux-image-powerpc64-smp, linux-image-4.4.0-164-powerpc64-emb, linux-image-omap, linux-image-4.4.0-164-powerpc64-smp, linux-image-4.4.0-1054-aws