USN-4209-1: Linux kernel vulnerabilities

Releases

• Ubuntu 19.04
• Ubuntu 18.04 ESM

Packages

• linux - Linux kernel
• linux-aws - Linux kernel for Amazon Web Services (AWS) systems
• linux-aws-5.0 - Linux kernel for Amazon Web Services (AWS) systems
• linux-gcp - Linux kernel for Google Cloud Platform (GCP) 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-osp1 - Linux kernel for OEM processors
• linux-oracle - Linux kernel for Oracle Cloud systems
• linux-oracle-5.0 - Linux kernel for Oracle Cloud systems
• linux-raspi2 - Linux kernel for Raspberry Pi 2

Details

Jann Horn discovered that the OverlayFS and ShiftFS Drivers in the Linux
kernel did not properly handle reference counting during memory mapping
operations when used in conjunction with AUFS. A local attacker could use
this to cause a denial of service (system crash) or possibly execute
arbitrary code. (CVE-2019-15794)

It was discovered that a buffer overflow existed in the 802.11 Wi-Fi
configuration interface for the Linux kernel when handling beacon settings.
A local attacker could use this to cause a denial of service (system crash)
or possibly execute arbitrary code. (CVE-2019-16746)

It was discovered that there was a memory leak in the Advanced Buffer
Management functionality of the Netronome NFP4000/NFP6000 NIC Driver in the
Linux kernel during certain error scenarios. A local attacker could use
this to cause a denial of service (memory exhaustion). (CVE-2019-19076)

Update instructions

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

Ubuntu 19.04

• linux-image-5.0.0-1008-oracle - 5.0.0-1008.13
• linux-image-5.0.0-1022-aws - 5.0.0-1022.25
• linux-image-5.0.0-1023-kvm - 5.0.0-1023.25
• linux-image-5.0.0-1023-raspi2 - 5.0.0-1023.24
• linux-image-5.0.0-1026-gcp - 5.0.0-1026.27
• linux-image-5.0.0-37-generic - 5.0.0-37.40
• linux-image-5.0.0-37-generic-lpae - 5.0.0-37.40
• linux-image-5.0.0-37-lowlatency - 5.0.0-37.40
• linux-image-aws - 5.0.0.1022.24
• linux-image-gcp - 5.0.0.1026.51
• linux-image-generic - 5.0.0.37.39
• linux-image-generic-lpae - 5.0.0.37.39
• linux-image-gke - 5.0.0.1026.51
• linux-image-kvm - 5.0.0.1023.24
• linux-image-lowlatency - 5.0.0.37.39
• linux-image-oracle - 5.0.0.1008.34
• linux-image-raspi2 - 5.0.0.1023.21
• linux-image-virtual - 5.0.0.37.39

Ubuntu 18.04

• linux-image-5.0.0-1008-oracle - 5.0.0-1008.13~18.04.1
• linux-image-5.0.0-1022-aws - 5.0.0-1022.25~18.04.1
• linux-image-5.0.0-1026-gcp - 5.0.0-1026.27~18.04.1
• linux-image-5.0.0-1026-gke - 5.0.0-1026.27~18.04.2
• linux-image-5.0.0-1030-oem-osp1 - 5.0.0-1030.34
• linux-image-5.0.0-37-generic - 5.0.0-37.40~18.04.1
• linux-image-5.0.0-37-generic-lpae - 5.0.0-37.40~18.04.1
• linux-image-5.0.0-37-lowlatency - 5.0.0-37.40~18.04.1
• linux-image-aws-edge - 5.0.0.1022.36
• linux-image-gcp - 5.0.0.1026.30
• linux-image-generic-hwe-18.04 - 5.0.0.37.95
• linux-image-generic-lpae-hwe-18.04 - 5.0.0.37.95
• linux-image-gke-5.0 - 5.0.0.1026.15
• linux-image-lowlatency-hwe-18.04 - 5.0.0.37.95
• linux-image-oem-osp1 - 5.0.0.1030.34
• linux-image-oracle-edge - 5.0.0.1008.7
• linux-image-snapdragon-hwe-18.04 - 5.0.0.37.95
• linux-image-virtual-hwe-18.04 - 5.0.0.37.95

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-2019-15794
• CVE-2019-16746
• CVE-2019-19076

Related notices

• USN-4208-1: linux-oracle, linux-image-5.3.0-24-generic-lpae, linux-image-lowlatency, linux-image-generic-lpae, linux-image-5.3.0-1009-gcp, linux-kvm, linux-aws, linux-image-5.3.0-1008-aws, linux-gcp-5.3, linux-image-5.3.0-24-snapdragon, linux-image-generic, linux-image-oracle, linux-image-snapdragon, linux-image-gcp, linux-image-aws, linux-image-5.3.0-24-lowlatency, linux-image-virtual, linux-image-kvm, linux-image-5.3.0-1008-kvm, linux-image-5.3.0-24-generic, linux-gcp, linux, linux-image-5.3.0-1007-oracle, linux-image-gke, linux-image-gcp-edge
• USN-4186-1: linux-image-4.4.0-1062-kvm, linux-image-4.4.0-1098-aws, linux-image-lowlatency-lts-wily, linux-image-virtual-lts-utopic, linux-image-4.4.0-168-powerpc-smp, linux-image-lowlatency-lts-xenial, linux-image-lowlatency, linux-image-powerpc-e500mc-lts-utopic, linux-image-powerpc-e500mc-lts-wily, linux-image-powerpc-smp, linux-image-generic-lpae, linux-image-generic-lpae-lts-utopic, linux-image-generic-lpae-lts-xenial, linux-image-powerpc-smp-lts-utopic, linux-image-virtual-lts-xenial, linux-kvm, linux-aws, linux-image-powerpc-smp-lts-xenial, linux-image-powerpc64-smp-lts-vivid, linux-image-virtual-lts-vivid, linux-image-4.4.0-168-powerpc64-emb, linux-image-generic-lts-xenial, linux-image-powerpc64-smp, linux-image-generic-lpae-lts-wily, linux-image-powerpc64-emb-lts-vivid, linux-image-generic, linux-image-generic-lts-vivid, linux-image-4.4.0-168-lowlatency, linux-image-powerpc-e500mc-lts-vivid, linux-image-powerpc64-emb-lts-utopic, linux-image-virtual-lts-wily, linux-image-4.4.0-168-powerpc64-smp, linux-image-4.4.0-168-generic, linux-image-powerpc64-emb-lts-xenial, linux-image-generic-lts-wily, linux-image-aws, linux-image-lowlatency-lts-vivid, linux-image-powerpc-e500mc, linux-image-powerpc64-smp-lts-wily, linux-image-powerpc64-smp-lts-xenial, linux-image-virtual, linux-image-kvm, linux-image-powerpc64-emb, linux-image-powerpc64-emb-lts-wily, linux-image-powerpc-e500mc-lts-xenial, linux-image-generic-lpae-lts-vivid, linux-image-lowlatency-lts-utopic, linux-image-powerpc64-smp-lts-utopic, linux-image-generic-lts-utopic, linux-image-powerpc-smp-lts-vivid, linux, linux-image-powerpc-smp-lts-wily, linux-image-4.4.0-168-generic-lpae, linux-image-4.4.0-168-powerpc-e500mc
• USN-4210-1: linux-oracle, linux-raspi2, linux-image-oem, linux-image-generic-lpae-hwe-16.04-edge, linux-image-4.15.0-72-lowlatency, linux-image-lowlatency, linux-image-generic-lpae, linux-kvm, linux-aws-hwe, linux-aws, linux-image-lowlatency-hwe-16.04-edge, linux-image-4.15.0-72-generic, linux-oem, linux-image-4.15.0-1056-aws, linux-image-4.15.0-1049-gke, linux-image-generic-lpae-hwe-16.04, linux-image-virtual-hwe-16.04-edge, linux-image-generic, linux-image-generic-hwe-16.04-edge, linux-image-oracle, linux-image-4.15.0-1069-snapdragon, linux-image-oracle-lts-18.04, linux-image-snapdragon, linux-image-gcp, linux-image-4.15.0-1065-oem, linux-image-4.15.0-1030-oracle, linux-gke-4.15, linux-image-aws-hwe, linux-image-4.15.0-72-generic-lpae, linux-image-lowlatency-hwe-16.04, linux-image-aws, linux-image-virtual, linux-image-gke-4.15, linux-image-kvm, linux-image-virtual-hwe-16.04, linux-image-4.15.0-1050-gcp, linux-image-raspi2, linux-gcp, linux-hwe, linux, linux-image-4.15.0-1051-kvm, linux-snapdragon, linux-image-gke, linux-image-aws-lts-18.04, linux-image-4.15.0-1052-raspi2, linux-image-generic-hwe-16.04
• USN-4183-1: linux-oracle, linux-raspi2, linux-azure, linux-image-lowlatency, linux-image-generic-lpae, linux-image-5.3.0-1007-kvm, linux-image-5.3.0-1008-gcp, linux-kvm, linux-image-5.3.0-1007-azure, linux-image-azure, linux-aws, linux-image-5.3.0-1007-aws, linux-image-5.3.0-22-generic, linux-image-generic, linux-image-oracle, linux-image-snapdragon, linux-image-gcp, linux-image-aws, linux-image-virtual, linux-image-5.3.0-22-snapdragon, linux-image-kvm, linux-image-5.3.0-22-lowlatency, linux-image-raspi2, linux-gcp, linux-image-5.3.0-1012-raspi2, linux-image-5.3.0-22-generic-lpae, linux, linux-image-gke, linux-image-5.3.0-1006-oracle