USN-4346-1: Linux kernel vulnerabilities

29 April 2020

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-kvm - Linux kernel for cloud environments
  • linux-lts-xenial - Linux hardware enablement kernel from Xenial for Trusty
  • linux-raspi2 - Linux kernel for Raspberry Pi 2
  • linux-snapdragon - Linux kernel for Snapdragon processors

Details

It was discovered that the QLogic Fibre Channel driver in the Linux kernel
did not properly check for error, leading to a NULL pointer dereference. A
local attacker could possibly use this to cause a denial of service (system
crash). (CVE-2019-16233)

It was discovered that the Intel Wi-Fi driver in the Linux kernel did not
properly check for errors in some situations. A local attacker could
possibly use this to cause a denial of service (system crash).
(CVE-2019-16234)

Tristan Madani discovered that the block I/O tracing implementation in the
Linux kernel contained a race condition. A local attacker could use this to
cause a denial of service (system crash) or possibly expose sensitive
information. (CVE-2019-19768)

It was discovered that the virtual terminal implementation in the Linux
kernel contained a race condition. A local attacker could possibly use this
to cause a denial of service (system crash) or expose sensitive
information. (CVE-2020-8648)

Jordy Zomer discovered that the floppy driver in the Linux kernel did not
properly check for errors in some situations. A local attacker could
possibly use this to cause a denial of service (system crash) or possibly
expose sensitive information. (CVE-2020-9383)

Update instructions

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

Ubuntu 16.04
Ubuntu 14.04

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-4226-1: linux-image-oracle-edge, linux-image-5.0.0-38-lowlatency, linux-image-raspi2, linux-image-generic, linux-image-5.0.0-1024-kvm, linux-image-gcp, linux-image-oem-osp1, linux-image-5.0.0-1028-azure, linux-gke-5.0, linux-image-generic-lpae, linux-azure, linux-kvm, linux-image-5.0.0-1024-raspi2, linux-aws, linux-image-gke, linux-image-5.0.0-38-generic-lpae, linux, linux-image-gke-5.0, linux-image-aws, linux-oracle, linux-image-5.0.0-1028-gcp, linux-image-kvm, linux-image-virtual, linux-oracle-5.0, linux-image-5.0.0-1033-oem-osp1, linux-image-5.0.0-1027-gke, linux-oem-osp1, linux-image-oracle, linux-aws-5.0, linux-image-5.0.0-38-generic, linux-image-lowlatency, linux-raspi2, linux-image-5.0.0-1023-aws, linux-image-azure, linux-image-5.0.0-1009-oracle, linux-gcp, linux-image-aws-edge
  • USN-4342-1: linux-image-5.3.0-51-snapdragon, linux-image-raspi2, linux-hwe, linux-image-generic, linux-image-raspi2-hwe-18.04, linux-oracle-5.3, linux-image-generic-lpae-hwe-18.04, linux-image-snapdragon, linux-image-gcp, linux-gcp-5.3, linux-image-snapdragon-hwe-18.04, linux-image-lowlatency-hwe-18.04, linux-image-generic-lpae, linux-azure, linux-kvm, linux-image-5.3.0-1016-kvm, linux-image-5.3.0-1017-aws, linux-image-5.3.0-1020-azure, linux-aws, linux-image-gke, linux-gke-5.3, linux-image-5.3.0-1023-raspi2, linux-image-5.3.0-1016-oracle, linux, linux-image-5.3.0-1018-gke, linux-image-gke-5.3, linux-image-virtual-hwe-18.04, linux-image-aws, linux-oracle, linux-image-kvm, linux-raspi2-5.3, linux-image-virtual, linux-image-5.3.0-51-generic, linux-image-5.3.0-51-generic-lpae, linux-image-oracle, linux-image-lowlatency, linux-raspi2, linux-azure-5.3, linux-image-generic-hwe-18.04, linux-image-azure, linux-image-5.3.0-1018-gcp, linux-image-5.3.0-51-lowlatency, linux-gcp
  • USN-4344-1: linux-gke-5.0, linux-image-5.0.0-1050-oem-osp1, linux-image-5.0.0-1035-gke, linux-oem-osp1, linux-image-gke-5.0, linux-image-oem-osp1
  • USN-4345-1: linux-image-raspi2, linux-image-oem, linux-hwe, linux-image-generic, linux-image-4.15.0-99-generic, linux-image-4.15.0-1077-snapdragon, linux-image-virtual-hwe-16.04, linux-image-snapdragon, linux-image-4.15.0-1058-gke, linux-image-gcp, linux-image-aws-lts-18.04, linux-image-powerpc-e500mc, linux-image-generic-lpae, linux-azure, linux-aws-hwe, linux-gke-4.15, linux-kvm, linux-oem, linux-image-4.15.0-1082-azure, linux-aws, linux-image-gke, linux, linux-image-4.15.0-99-lowlatency, linux-image-4.15.0-1061-gcp, linux-image-4.15.0-1038-oracle, linux-oracle, linux-image-kvm, linux-snapdragon, linux-image-4.15.0-99-generic-lpae, linux-image-oracle-lts-18.04, linux-image-virtual, linux-image-aws-hwe, linux-image-azure-edge, linux-image-generic-hwe-16.04, linux-image-oracle, linux-image-4.15.0-1066-aws, linux-image-lowlatency, linux-image-lowlatency-hwe-16.04, linux-raspi2, linux-image-powerpc64-emb, linux-image-4.15.0-1061-raspi2, linux-image-gke-4.15, linux-image-4.15.0-1080-oem, linux-image-powerpc64-smp, linux-image-azure, linux-image-4.15.0-1059-kvm, linux-image-generic-lpae-hwe-16.04, linux-image-powerpc-smp, linux-gcp
  • USN-4227-1: linux-image-4.15.0-74-lowlatency, linux-image-raspi2, linux-image-oem, linux-hwe, linux-image-generic, linux-image-virtual-hwe-16.04, linux-image-snapdragon, linux-image-gcp, linux-image-aws-lts-18.04, linux-image-powerpc-e500mc, linux-image-4.15.0-74-generic-lpae, linux-image-generic-lpae, linux-azure, linux-aws-hwe, linux-gke-4.15, linux-kvm, linux-oem, linux-aws, linux-image-gke, linux, linux-image-4.15.0-1070-snapdragon, linux-image-aws, linux-snapdragon, linux-oracle, linux-image-4.15.0-1057-aws, linux-image-kvm, linux-image-oracle-lts-18.04, linux-image-4.15.0-1066-azure, linux-image-virtual, linux-image-4.15.0-1052-gcp, linux-image-4.15.0-1031-oracle, linux-image-aws-hwe, linux-image-4.15.0-1052-kvm, linux-image-4.15.0-1053-raspi2, linux-image-azure-edge, linux-image-generic-hwe-16.04, linux-image-oracle, linux-image-4.15.0-74-generic, linux-image-4.15.0-1066-oem, linux-image-4.15.0-1050-gke, linux-image-lowlatency, linux-image-lowlatency-hwe-16.04, linux-raspi2, linux-image-powerpc64-emb, linux-image-gke-4.15, linux-image-powerpc64-smp, linux-image-azure, linux-image-generic-lpae-hwe-16.04, linux-image-powerpc-smp, linux-gcp
  • USN-4227-2: linux-azure, linux-image-azure, linux-image-4.15.0-1066-azure