Your submission was sent successfully! Close

Thank you for contacting us. A member of our team will be in touch shortly. Close

You have successfully unsubscribed! Close

Thank you for signing up for our newsletter!
In these regular emails you will find the latest updates about Ubuntu and upcoming events where you can meet our team.Close

USN-4254-1: Linux kernel vulnerabilities

28 January 2020

Several security issues were fixed in the Linux kernel.

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

Learn more about Ubuntu Pro

Releases

Packages

Details

It was discovered that the Linux kernel did not properly clear data
structures on context switches for certain Intel graphics processors. A
local attacker could use this to expose sensitive information.
(CVE-2019-14615)

It was discovered that a race condition existed in the Virtual Video Test
Driver in the Linux kernel. An attacker with write access to /dev/video0 on
a system with the vivid module loaded could possibly use this to gain
administrative privileges. (CVE-2019-18683)

It was discovered that the btrfs file system in the Linux kernel did not
properly validate metadata, leading to a NULL pointer dereference. An
attacker could use this to specially craft a file system image that, when
mounted, could cause a denial of service (system crash). (CVE-2019-18885)

It was discovered that multiple memory leaks existed in the Marvell WiFi-Ex
Driver for the Linux kernel. A local attacker could possibly use this to
cause a denial of service (kernel memory exhaustion). (CVE-2019-19057)

It was discovered that the crypto subsystem in the Linux kernel did not
properly deallocate memory in certain error conditions. A local attacker
could use this to cause a denial of service (kernel memory exhaustion).
(CVE-2019-19062)

It was discovered that the Realtek rtlwifi USB device driver in the Linux
kernel did not properly deallocate memory in certain error conditions. A
local attacker could possibly use this to cause a denial of service (kernel
memory exhaustion). (CVE-2019-19063)

Dan Carpenter discovered that the AppleTalk networking subsystem of the
Linux kernel did not properly handle certain error conditions, leading to a
NULL pointer dereference. A local attacker could use this to cause a denial
of service (system crash). (CVE-2019-19227)

It was discovered that the KVM hypervisor implementation in the Linux
kernel did not properly handle ioctl requests to get emulated CPUID
features. An attacker with access to /dev/kvm could use this to cause a
denial of service (system crash). (CVE-2019-19332)

It was discovered that the B2C2 FlexCop USB device driver in the Linux
kernel did not properly validate device metadata. A physically proximate
attacker could use this to cause a denial of service (system crash).
(CVE-2019-15291)

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

Learn more about Ubuntu Pro

Update instructions

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

Ubuntu 16.04

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.

References

Related notices

  • USN-4255-2: linux-image-4.15.0-1058-aws, linux-image-lowlatency-hwe-16.04-edge, linux-image-4.15.0-76-generic, linux-image-virtual-hwe-16.04-edge, linux-image-generic-lpae-hwe-16.04-edge, linux-image-aws-hwe, linux-image-generic-hwe-16.04, linux-image-lowlatency-hwe-16.04, linux-hwe, linux-aws-hwe, linux-image-generic-hwe-16.04-edge, linux-image-virtual-hwe-16.04, linux-image-4.15.0-76-generic-lpae, linux-image-4.15.0-76-lowlatency, linux-image-oem, linux-image-generic-lpae-hwe-16.04
  • USN-4253-1: linux-aws, linux-image-5.3.0-29-generic, linux-image-5.3.0-1010-aws, linux-image-5.3.0-29-lowlatency, linux-image-generic, linux-image-aws, linux-image-5.3.0-29-snapdragon, linux-image-5.3.0-29-generic-lpae, linux-image-virtual, linux, linux-image-generic-lpae, linux-image-lowlatency
  • USN-4285-1: linux-azure, linux-image-gke-5.0, linux-image-azure, linux-image-gcp, linux-aws-5.0, linux-image-5.0.0-1011-oracle, linux-image-5.0.0-1031-gcp, linux-image-5.0.0-1030-gke, linux-image-5.0.0-1025-aws, linux-image-aws-edge, linux-gcp, linux-oracle-5.0, linux-image-5.0.0-1032-azure, linux-image-oracle-edge, linux-gke-5.0
  • USN-4255-1: linux-image-lowlatency-hwe-16.04-edge, linux-image-4.15.0-76-lowlatency, linux, linux-image-lowlatency, linux-image-virtual-hwe-16.04-edge, linux-image-generic, linux-image-virtual-hwe-16.04, linux-image-4.15.0-1067-oem, linux-image-generic-lpae, linux-image-oem, linux-image-generic-lpae-hwe-16.04, linux-image-4.15.0-76-generic, linux-image-aws-lts-18.04, linux-image-lowlatency-hwe-16.04, linux-image-generic-hwe-16.04, linux-oem, linux-image-aws, linux-image-4.15.0-76-generic-lpae, linux-aws, linux-image-4.15.0-1058-aws, linux-image-generic-lpae-hwe-16.04-edge, linux-image-generic-hwe-16.04-edge, linux-image-virtual
  • USN-4253-2: linux-image-lowlatency-hwe-18.04-edge, linux-image-generic-hwe-18.04, linux-image-lowlatency-hwe-18.04, linux-image-virtual-hwe-18.04-edge, linux-image-5.3.0-28-lowlatency, linux-hwe, linux-image-5.3.0-28-generic, linux-image-generic-lpae-hwe-18.04, linux-image-snapdragon-hwe-18.04-edge, linux-image-virtual-hwe-18.04, linux-image-5.3.0-28-generic-lpae, linux-image-snapdragon-hwe-18.04, linux-image-generic-hwe-18.04-edge, linux-image-generic-lpae-hwe-18.04-edge
  • USN-4287-1: linux-image-lowlatency-hwe-16.04-edge, linux-image-oracle-lts-18.04, linux-image-gcp, linux-snapdragon, linux-image-gke, linux-image-4.15.0-1052-gke, linux, linux-image-4.15.0-1033-oracle, linux-image-lowlatency, linux-image-azure, linux-image-virtual-hwe-16.04-edge, linux-kvm, linux-image-4.15.0-1060-aws, linux-image-azure-edge, linux-oracle, linux-image-generic, linux-image-virtual-hwe-16.04, linux-image-4.15.0-1071-azure, linux-image-aws-hwe, linux-image-generic-lpae, linux-image-oem, linux-image-generic-lpae-hwe-16.04, linux-azure, linux-image-snapdragon, linux-image-4.15.0-1055-gcp, linux-image-aws-lts-18.04, linux-image-lowlatency-hwe-16.04, linux-image-generic-hwe-16.04, linux-image-4.15.0-88-generic-lpae, linux-image-4.15.0-88-lowlatency, linux-image-aws, linux-aws-hwe, linux-image-raspi2, linux-image-4.15.0-1072-snapdragon, linux-gcp, linux-gke-4.15, linux-image-kvm, linux-aws, linux-image-4.15.0-1053-kvm, linux-image-4.15.0-1055-raspi2, linux-image-4.15.0-88-generic, linux-image-generic-lpae-hwe-16.04-edge, linux-image-oracle, linux-hwe, linux-raspi2, linux-image-generic-hwe-16.04-edge, linux-image-virtual, linux-image-gke-4.15
  • USN-4287-2: linux-azure, linux-image-azure, linux-image-4.15.0-1069-azure
  • USN-4286-1: linux-image-generic-lts-utopic, linux-image-generic-lts-xenial, linux-image-4.4.0-174-generic, linux-snapdragon, linux-image-4.4.0-174-powerpc-smp, linux-image-virtual-lts-wily, linux-image-generic-lts-vivid, linux-image-4.4.0-174-generic-lpae, linux, linux-image-4.4.0-1129-raspi2, linux-image-lowlatency, linux-image-generic-lts-wily, linux-image-powerpc64-emb-lts-vivid, linux-image-powerpc-e500mc, linux-image-4.4.0-174-powerpc64-emb, linux-image-generic-lpae-lts-utopic, linux-image-powerpc64-emb-lts-wily, linux-image-4.4.0-1102-aws, linux-image-generic-lpae-lts-xenial, linux-image-virtual-lts-utopic, linux-kvm, linux-image-generic, linux-image-powerpc-e500mc-lts-wily, linux-image-lowlatency-lts-xenial, linux-image-powerpc64-emb, linux-image-powerpc64-emb-lts-utopic, linux-image-powerpc-smp-lts-xenial, linux-image-powerpc-smp-lts-wily, linux-image-generic-lpae, linux-image-snapdragon, linux-image-lowlatency-lts-wily, linux-image-4.4.0-1066-kvm, linux-image-powerpc-e500mc-lts-vivid, linux-image-4.4.0-174-powerpc-e500mc, linux-image-generic-lpae-lts-vivid, linux-image-aws, linux-image-lowlatency-lts-utopic, linux-image-4.4.0-174-powerpc64-smp, linux-image-raspi2, linux-image-powerpc64-smp-lts-vivid, linux-image-powerpc-e500mc-lts-utopic, linux-image-kvm, linux-image-powerpc-smp-lts-vivid, linux-image-powerpc64-smp-lts-wily, linux-aws, linux-image-powerpc64-smp, linux-image-lowlatency-lts-vivid, linux-image-4.4.0-1133-snapdragon, linux-image-powerpc-e500mc-lts-xenial, linux-image-virtual-lts-xenial, linux-image-powerpc64-smp-lts-xenial, linux-image-powerpc-smp, linux-image-generic-lpae-lts-wily, linux-raspi2, linux-image-4.4.0-174-lowlatency, linux-image-virtual, linux-image-virtual-lts-vivid, linux-image-powerpc64-emb-lts-xenial, linux-image-powerpc-smp-lts-utopic, linux-image-powerpc64-smp-lts-utopic
  • USN-4286-2: linux-image-generic-lts-xenial, linux-image-4.4.0-174-generic, linux-image-4.4.0-174-powerpc-smp, linux-image-4.4.0-174-generic-lpae, linux-image-4.4.0-174-powerpc64-emb, linux-image-generic-lpae-lts-xenial, linux-image-lowlatency-lts-xenial, linux-image-powerpc-smp-lts-xenial, linux-image-4.4.0-1062-aws, linux-lts-xenial, linux-image-4.4.0-174-powerpc-e500mc, linux-image-aws, linux-image-4.4.0-174-powerpc64-smp, linux-aws, linux-image-powerpc-e500mc-lts-xenial, linux-image-virtual-lts-xenial, linux-image-powerpc64-smp-lts-xenial, linux-image-4.4.0-174-lowlatency, linux-image-powerpc64-emb-lts-xenial
  • USN-4254-2: linux-image-generic-lts-xenial, linux-image-4.4.0-173-powerpc-e500mc, linux-image-4.4.0-173-powerpc-smp, linux-image-4.4.0-173-lowlatency, linux-image-4.4.0-173-generic-lpae, linux-image-generic-lpae-lts-xenial, linux-image-lowlatency-lts-xenial, linux-image-powerpc-smp-lts-xenial, linux-lts-xenial, linux-image-aws, linux-aws, linux-image-powerpc-e500mc-lts-xenial, linux-image-virtual-lts-xenial, linux-image-powerpc64-smp-lts-xenial, linux-image-4.4.0-173-powerpc64-smp, linux-image-4.4.0-173-generic, linux-image-4.4.0-173-powerpc64-emb, linux-image-4.4.0-1061-aws, linux-image-powerpc64-emb-lts-xenial
  • USN-4284-1: linux-image-5.3.0-40-generic, linux-image-gcp, linux-azure-5.3, linux-image-gke, linux-image-snapdragon-hwe-18.04-edge, linux-image-snapdragon-hwe-18.04, linux-image-generic-hwe-18.04-edge, linux-image-raspi2-hwe-18.04, linux, linux-image-lowlatency, linux-image-5.3.0-1010-kvm, linux-image-lowlatency-hwe-18.04-edge, linux-image-azure, linux-image-lowlatency-hwe-18.04, linux-kvm, linux-image-azure-edge, linux-image-virtual-hwe-18.04-edge, linux-oracle, linux-image-generic, linux-image-virtual-hwe-18.04, linux-image-5.3.0-40-lowlatency, linux-image-5.3.0-1009-oracle, linux-image-5.3.0-1018-raspi2, linux-image-generic-lpae, linux-azure, linux-gcp-5.3, linux-image-snapdragon, linux-raspi2-5.3, linux-image-aws, linux-image-5.3.0-1013-azure, linux-image-raspi2, linux-image-kvm, linux-gcp, linux-aws, linux-image-generic-hwe-18.04, linux-image-oracle, linux-hwe, linux-image-5.3.0-40-generic-lpae, linux-image-gcp-edge, linux-image-generic-lpae-hwe-18.04, linux-raspi2, linux-image-virtual, linux-image-generic-lpae-hwe-18.04-edge, linux-image-5.3.0-40-snapdragon, linux-image-5.3.0-1012-gcp, linux-image-5.3.0-1011-aws
  • USN-4258-1: linux-image-5.0.0-1029-gcp, linux-image-gke-5.0, linux-image-gcp, linux-aws-5.0, linux-image-5.0.0-1024-aws, linux-image-5.0.0-1029-gke, linux-image-aws-edge, linux-oracle-5.0, linux-gcp, linux-image-5.0.0-1010-oracle, linux-image-oracle-edge, linux-gke-5.0

Join the discussion

Need help with your security needs?

Ubuntu Pro provides up to ten-year security coverage for over 23,000 open-source packages within the Ubuntu Main and Universe repositories.

Talk to an expert to find out what would work best for you

Further reading