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USN-4344-1: Linux kernel vulnerabilities

28 April 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.

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Releases

Packages

Details

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)

It was discovered that the Intel WiMAX 2400 driver in the Linux kernel did
not properly deallocate memory in certain situations. A local attacker
could use this to cause a denial of service (kernel memory exhaustion).
(CVE-2019-19051)

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 vhost net driver in the Linux kernel contained a
stack buffer overflow. A local attacker with the ability to perform ioctl()
calls on /dev/vhost-net could use this to cause a denial of service (system
crash). (CVE-2020-10942)

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)

Shijie Luo discovered that the ext4 file system implementation in the Linux
kernel did not properly check for a too-large journal size. An attacker
could use this to construct a malicious ext4 image that, when mounted,
could cause a denial of service (soft lockup). (CVE-2020-8992)

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)

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 18.04

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-4345-1: linux-image-generic, linux-kvm, linux-raspi2, linux-image-4.15.0-1061-gcp, linux-image-virtual-hwe-16.04-edge, linux-image-lowlatency-hwe-16.04, linux-image-generic-lpae-hwe-16.04-edge, linux-image-4.15.0-1061-raspi2, linux-azure, linux-image-azure, linux-image-oracle, linux-image-azure-edge, linux-oracle, linux-image-gke, linux-image-4.15.0-1077-snapdragon, linux-image-lowlatency-hwe-16.04-edge, linux-image-generic-hwe-16.04, linux-image-lowlatency, linux-image-virtual-hwe-16.04, linux-image-4.15.0-1038-oracle, linux-image-aws-lts-18.04, linux-image-4.15.0-1082-azure, linux-snapdragon, linux-gcp, linux-image-gcp, linux-image-oracle-lts-18.04, linux-image-aws-hwe, linux-image-4.15.0-1080-oem, linux-image-kvm, linux-image-generic-lpae, linux-aws-hwe, linux-image-snapdragon, linux-image-oem, linux-image-4.15.0-99-generic, linux-image-generic-hwe-16.04-edge, linux, linux-image-raspi2, linux-hwe, linux-image-4.15.0-99-lowlatency, linux-image-4.15.0-99-generic-lpae, linux-image-4.15.0-1059-kvm, linux-image-generic-lpae-hwe-16.04, linux-aws, linux-gke-4.15, linux-image-gke-4.15, linux-image-virtual, linux-oem, linux-image-4.15.0-1066-aws, linux-image-4.15.0-1058-gke
  • USN-4342-1: linux-image-generic, linux-kvm, linux-image-generic-hwe-18.04, linux-image-gcp-edge, linux-image-oracle-edge, linux-image-5.3.0-1016-oracle, linux-image-generic-hwe-18.04-edge, linux-image-snapdragon-hwe-18.04, linux-raspi2-5.3, linux-azure, linux-image-azure, linux-image-oracle, linux-image-5.3.0-1016-kvm, linux-image-azure-edge, linux-image-gke-5.3, linux-oracle-5.3, linux-oracle, linux-image-gke, linux-image-snapdragon-hwe-18.04-edge, linux-image-lowlatency-hwe-18.04-edge, linux-image-5.3.0-1018-gke, linux-image-lowlatency, linux-image-raspi2-hwe-18.04, linux-image-5.3.0-51-snapdragon, linux-image-5.3.0-1023-raspi2, linux-image-aws, linux-gke-5.3, linux-image-5.3.0-1018-gcp, linux-image-5.3.0-1020-azure, linux-image-5.3.0-51-generic, linux-gcp, linux-image-gcp, linux-image-lowlatency-hwe-18.04, linux-image-virtual, linux-image-kvm, linux-image-generic-lpae-hwe-18.04-edge, linux-image-generic-lpae-hwe-18.04, linux-image-snapdragon, linux-image-5.3.0-51-generic-lpae, linux-image-5.3.0-51-lowlatency, linux, linux-aws, linux-image-raspi2, linux-hwe, linux-image-virtual-hwe-18.04-edge, linux-azure-5.3, linux-image-generic-lpae, linux-image-5.3.0-1017-aws, linux-raspi2, linux-gcp-5.3, linux-image-virtual-hwe-18.04
  • USN-4346-1: linux-image-generic, linux-kvm, linux-image-powerpc64-emb-lts-utopic, linux-image-4.4.0-1136-snapdragon, linux-image-lowlatency-lts-wily, linux-image-powerpc64-emb-lts-xenial, linux-image-powerpc64-smp-lts-utopic, linux-image-generic-lts-wily, linux-image-powerpc-smp, linux-lts-xenial, linux-image-generic-lts-xenial, linux-image-powerpc64-emb-lts-vivid, linux-image-virtual-lts-wily, linux-image-powerpc64-smp-lts-xenial, linux-image-4.4.0-178-powerpc64-emb, linux-image-generic-lts-utopic, linux-image-powerpc-e500mc-lts-xenial, linux-image-generic-lpae-lts-wily, linux-image-4.4.0-1132-raspi2, linux-image-lowlatency-lts-utopic, linux-image-virtual-lts-utopic, linux-image-virtual-lts-vivid, linux-image-generic-lpae-lts-vivid, linux-image-generic-lpae-lts-utopic, linux-image-4.4.0-178-powerpc-smp, linux-image-4.4.0-1106-aws, linux-image-lowlatency, linux-image-lowlatency-lts-xenial, linux-image-powerpc64-emb, linux-image-aws, linux-snapdragon, linux-image-powerpc-smp-lts-xenial, linux-image-powerpc-e500mc-lts-vivid, linux-image-4.4.0-178-generic-lpae, linux-image-powerpc-e500mc-lts-wily, linux-image-powerpc-e500mc-lts-utopic, linux-image-powerpc-e500mc, linux-image-generic-lts-vivid, linux-image-powerpc64-emb-lts-wily, linux-image-kvm, linux-image-powerpc64-smp, linux-image-generic-lpae-lts-xenial, linux-image-4.4.0-1070-kvm, linux-image-powerpc-smp-lts-vivid, linux-image-snapdragon, linux-image-4.4.0-1066-aws, linux-image-powerpc-smp-lts-wily, linux-image-4.4.0-178-lowlatency, linux-image-4.4.0-178-powerpc-e500mc, linux-image-4.4.0-178-powerpc64-smp, linux-image-lowlatency-lts-vivid, linux, linux-image-4.4.0-178-generic, linux-image-powerpc64-smp-lts-wily, linux-image-raspi2, linux-image-virtual-lts-xenial, linux-image-powerpc64-smp-lts-vivid, linux-aws, linux-image-generic-lpae, linux-raspi2, linux-image-virtual, linux-image-powerpc-smp-lts-utopic
  • USN-4225-1: linux-image-generic, linux-kvm, linux-image-5.3.0-1009-kvm, linux-image-5.3.0-1009-aws, linux-image-gcp-edge, linux-image-azure, linux-azure, linux-image-oracle, linux-image-azure-edge, linux-oracle, linux-image-gke, linux-image-5.3.0-26-generic, linux-image-lowlatency, linux-image-5.3.0-1011-gcp, linux-image-5.3.0-26-lowlatency, linux-image-5.3.0-1008-oracle, linux-image-aws, linux-gcp, linux-image-5.3.0-26-generic-lpae, linux-image-gcp, linux-image-5.3.0-1010-gcp, linux-image-virtual, linux-image-kvm, linux-image-5.3.0-1009-azure, linux-image-snapdragon, linux, linux-aws, linux-image-raspi2, linux-image-5.3.0-26-snapdragon, linux-azure-5.3, linux-image-generic-lpae, linux-raspi2, linux-gcp-5.3, linux-image-5.3.0-1015-raspi2
  • USN-4225-2: linux-image-generic-hwe-18.04, linux-image-5.3.0-26-generic-lpae, linux-image-5.3.0-26-generic, linux-image-lowlatency-hwe-18.04, linux-hwe, linux-image-snapdragon-hwe-18.04-edge, linux-image-lowlatency-hwe-18.04-edge, linux-image-virtual-hwe-18.04-edge, linux-image-generic-lpae-hwe-18.04-edge, linux-image-generic-hwe-18.04-edge, linux-image-snapdragon-hwe-18.04, linux-image-generic-lpae-hwe-18.04, linux-image-5.3.0-26-lowlatency, linux-image-virtual-hwe-18.04
  • USN-4286-1: linux-image-generic, linux-kvm, linux-image-powerpc64-emb-lts-utopic, linux-image-lowlatency-lts-wily, linux-image-powerpc64-emb-lts-xenial, linux-image-powerpc64-smp-lts-utopic, linux-image-generic-lts-wily, linux-image-powerpc-smp, linux-image-generic-lts-xenial, linux-image-powerpc64-emb-lts-vivid, linux-image-virtual-lts-wily, linux-image-powerpc64-smp-lts-xenial, linux-image-generic-lts-utopic, linux-image-powerpc-e500mc-lts-xenial, linux-image-4.4.0-1102-aws, linux-image-generic-lpae-lts-wily, linux-image-lowlatency-lts-utopic, linux-image-virtual-lts-utopic, linux-image-virtual-lts-vivid, linux-image-generic-lpae-lts-vivid, linux-image-4.4.0-1133-snapdragon, linux-image-generic-lpae-lts-utopic, linux-image-lowlatency, linux-image-4.4.0-174-generic, linux-image-lowlatency-lts-xenial, linux-image-4.4.0-174-powerpc-e500mc, linux-image-powerpc64-emb, linux-image-aws, linux-snapdragon, linux-image-powerpc-smp-lts-xenial, linux-image-powerpc-e500mc-lts-vivid, linux-image-powerpc-e500mc-lts-wily, linux-image-4.4.0-174-generic-lpae, linux-image-4.4.0-174-powerpc64-emb, linux-image-powerpc-e500mc-lts-utopic, linux-image-powerpc-e500mc, linux-image-generic-lts-vivid, linux-image-powerpc64-emb-lts-wily, linux-image-kvm, linux-image-powerpc64-smp, linux-image-4.4.0-174-powerpc-smp, linux-image-generic-lpae-lts-xenial, linux-image-4.4.0-174-lowlatency, linux-image-powerpc-smp-lts-vivid, linux-image-snapdragon, linux-image-4.4.0-174-powerpc64-smp, linux-image-powerpc-smp-lts-wily, linux-image-virtual-lts-xenial, linux-image-lowlatency-lts-vivid, linux, linux-image-powerpc64-smp-lts-wily, linux-image-raspi2, linux-image-powerpc64-smp-lts-vivid, linux-aws, linux-image-generic-lpae, linux-image-4.4.0-1066-kvm, linux-raspi2, linux-image-virtual, linux-image-powerpc-smp-lts-utopic, linux-image-4.4.0-1129-raspi2
  • USN-4286-2: linux-image-powerpc64-emb-lts-xenial, linux-lts-xenial, linux-image-generic-lts-xenial, linux-image-powerpc64-smp-lts-xenial, linux-image-powerpc-e500mc-lts-xenial, linux-image-4.4.0-174-generic, linux-image-lowlatency-lts-xenial, linux-image-4.4.0-174-powerpc-e500mc, linux-image-aws, linux-image-powerpc-smp-lts-xenial, linux-image-4.4.0-174-generic-lpae, linux-image-4.4.0-1062-aws, linux-image-4.4.0-174-powerpc64-emb, linux-image-4.4.0-174-powerpc-smp, linux-image-generic-lpae-lts-xenial, linux-image-4.4.0-174-lowlatency, linux-image-4.4.0-174-powerpc64-smp, linux-image-virtual-lts-xenial, linux-aws
  • USN-4302-1: linux-image-4.15.0-1058-gcp, linux-image-generic, linux-kvm, linux-raspi2, linux-image-4.15.0-1074-snapdragon, linux-image-4.15.0-1063-aws, linux-image-virtual-hwe-16.04-edge, linux-image-lowlatency-hwe-16.04, linux-image-generic-lpae-hwe-16.04-edge, linux-image-4.15.0-1055-gke, linux-azure, linux-image-azure, linux-image-4.15.0-1074-azure, linux-image-oracle, linux-image-azure-edge, linux-image-4.15.0-91-generic, linux-oracle, linux-image-gke, linux-image-4.15.0-91-generic-lpae, linux-image-lowlatency-hwe-16.04-edge, linux-image-generic-hwe-16.04, linux-image-lowlatency, linux-image-virtual-hwe-16.04, linux-image-aws-lts-18.04, linux-image-aws, linux-snapdragon, linux-gcp, linux-image-4.15.0-1076-oem, linux-image-gcp, linux-image-aws-hwe, linux-image-oracle-lts-18.04, linux-image-4.15.0-1035-oracle, linux-image-4.15.0-1057-raspi2, linux-image-virtual, linux-image-4.15.0-1075-azure, linux-image-kvm, linux-image-generic-lpae, linux-aws-hwe, linux-image-snapdragon, linux-image-oem, linux-image-generic-hwe-16.04-edge, linux, linux-image-4.15.0-91-lowlatency, linux-hwe, linux-image-raspi2, linux-image-generic-lpae-hwe-16.04, linux-aws, linux-gke-4.15, linux-image-gke-4.15, linux-image-4.15.0-1056-kvm, linux-oem
  • USN-4364-1: linux-image-4.4.0-179-lowlatency, linux-image-generic, linux-kvm, linux-image-4.4.0-179-powerpc-e500mc, linux-image-powerpc64-emb-lts-utopic, linux-image-lowlatency-lts-wily, linux-image-powerpc64-emb-lts-xenial, linux-image-4.4.0-1133-raspi2, linux-image-powerpc64-smp-lts-utopic, linux-image-generic-lts-wily, linux-image-powerpc-smp, linux-lts-xenial, linux-image-generic-lts-xenial, linux-image-powerpc64-emb-lts-vivid, linux-image-virtual-lts-wily, linux-image-4.4.0-179-powerpc64-smp, linux-image-powerpc64-smp-lts-xenial, linux-image-generic-lts-utopic, linux-image-powerpc-e500mc-lts-xenial, linux-image-generic-lpae-lts-wily, linux-image-4.4.0-179-powerpc64-emb, linux-image-4.4.0-179-generic, linux-image-lowlatency-lts-utopic, linux-image-virtual-lts-utopic, linux-image-virtual-lts-vivid, linux-image-generic-lpae-lts-vivid, linux-image-generic-lpae-lts-utopic, linux-image-lowlatency, linux-image-4.4.0-1137-snapdragon, linux-image-4.4.0-179-generic-lpae, linux-image-lowlatency-lts-xenial, linux-image-4.4.0-1067-aws, linux-image-powerpc64-emb, linux-image-4.4.0-179-powerpc-smp, linux-image-aws, linux-snapdragon, linux-image-powerpc-smp-lts-xenial, linux-image-4.4.0-1107-aws, linux-image-powerpc-e500mc-lts-vivid, linux-image-powerpc-e500mc-lts-wily, linux-image-powerpc-e500mc-lts-utopic, linux-image-powerpc-e500mc, linux-image-generic-lts-vivid, linux-image-powerpc64-emb-lts-wily, linux-image-kvm, linux-image-powerpc64-smp, linux-image-generic-lpae-lts-xenial, linux-image-powerpc-smp-lts-vivid, linux-image-snapdragon, linux-image-powerpc-smp-lts-wily, linux-image-virtual-lts-xenial, linux-image-lowlatency-lts-vivid, linux, linux-image-4.4.0-1071-kvm, linux-image-powerpc64-smp-lts-wily, linux-image-raspi2, linux-image-powerpc64-smp-lts-vivid, linux-aws, linux-image-generic-lpae, linux-raspi2, linux-image-virtual, linux-image-powerpc-smp-lts-utopic
  • LSN-0066-1: azure, generic-4.4, aws, lowlatency-4.15, oem, lowlatency-4.4, generic-4.15
  • LSN-0068-1: generic-4.4, aws, lowlatency-4.15, oem, lowlatency-4.4, generic-4.15
  • USN-4324-1: linux-kvm, linux-raspi2, linux-image-4.15.0-1057-gke, linux-image-4.15.0-1065-aws, linux-image-azure, linux-azure, linux-image-oracle, linux-image-4.15.0-1060-raspi2, linux-image-azure-edge, linux-oracle, linux-image-gke, linux-image-aws-lts-18.04, linux-image-aws, linux-snapdragon, linux-image-4.15.0-1079-oem, linux-gcp, linux-image-gcp, linux-image-oracle-lts-18.04, linux-image-aws-hwe, linux-image-4.15.0-1058-kvm, linux-image-kvm, linux-image-4.15.0-1037-oracle, linux-image-4.15.0-1076-snapdragon, linux-aws-hwe, linux-image-snapdragon, linux-image-oem, linux-image-4.15.0-1060-gcp, linux-image-raspi2, linux-image-4.15.0-1077-azure, linux-aws, linux-gke-4.15, linux-image-gke-4.15, linux-oem
  • USN-4318-1: linux-image-generic, linux-image-oem, linux-image-4.15.0-96-lowlatency, linux-image-generic-hwe-16.04-edge, linux, linux-image-virtual-hwe-16.04-edge, linux-hwe, linux-image-lowlatency-hwe-16.04, linux-image-lowlatency-hwe-16.04-edge, linux-image-generic-lpae-hwe-16.04-edge, linux-image-generic-hwe-16.04, linux-image-4.15.0-96-generic-lpae, linux-image-generic-lpae-hwe-16.04, linux-image-lowlatency, linux-image-generic-lpae, linux-image-4.15.0-96-generic, linux-image-virtual-hwe-16.04, linux-image-virtual
  • USN-4419-1: linux-image-generic, linux-kvm, linux-image-powerpc64-emb-lts-utopic, linux-image-lowlatency-lts-wily, linux-image-powerpc64-emb-lts-xenial, linux-image-powerpc64-smp-lts-utopic, linux-image-generic-lts-wily, linux-image-powerpc-smp, linux-lts-xenial, linux-image-4.4.0-1139-snapdragon, linux-image-generic-lts-xenial, linux-image-powerpc64-emb-lts-vivid, linux-image-virtual-lts-wily, linux-image-powerpc64-smp-lts-xenial, linux-image-generic-lts-utopic, linux-image-powerpc-e500mc-lts-xenial, linux-image-generic-lpae-lts-wily, linux-image-4.4.0-1074-aws, linux-image-4.4.0-1110-aws, linux-image-4.4.0-1135-raspi2, linux-image-lowlatency-lts-utopic, linux-image-virtual-lts-utopic, linux-image-virtual-lts-vivid, linux-image-4.4.0-185-lowlatency, linux-image-generic-lpae-lts-vivid, linux-image-generic-lpae-lts-utopic, linux-image-4.4.0-185-powerpc-smp, linux-image-lowlatency, linux-image-lowlatency-lts-xenial, linux-image-4.4.0-185-powerpc64-smp, linux-image-powerpc64-emb, linux-image-aws, linux-snapdragon, linux-image-powerpc-smp-lts-xenial, linux-image-powerpc-e500mc-lts-vivid, linux-image-powerpc-e500mc-lts-wily, linux-image-powerpc-e500mc-lts-utopic, linux-image-4.4.0-185-powerpc-e500mc, linux-image-generic-lts-vivid, linux-image-powerpc-e500mc, linux-image-powerpc64-emb-lts-wily, linux-image-4.4.0-185-generic-lpae, linux-image-kvm, linux-image-powerpc64-smp, linux-image-generic-lpae-lts-xenial, linux-image-4.4.0-1076-kvm, linux-image-powerpc-smp-lts-vivid, linux-image-snapdragon, linux-image-powerpc-smp-lts-wily, linux-image-4.4.0-185-powerpc64-emb, linux-image-virtual-lts-xenial, linux-image-lowlatency-lts-vivid, linux, linux-aws, linux-image-powerpc64-smp-lts-wily, linux-image-raspi2, linux-image-powerpc64-smp-lts-vivid, linux-image-4.4.0-185-generic, linux-image-generic-lpae, linux-raspi2, linux-image-virtual, linux-image-powerpc-smp-lts-utopic