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USN-4211-1: Linux kernel vulnerabilities

3 December 2019

Several security issues were fixed in the Linux kernel.

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Releases

Packages

Details

Zhipeng Xie discovered that an infinite loop could be triggered in the CFS
Linux kernel process scheduler. A local attacker could possibly use this to
cause a denial of service. (CVE-2018-20784)

Nicolas Waisman discovered that the WiFi driver stack in the Linux kernel
did not properly validate SSID lengths. A physically proximate attacker
could use this to cause a denial of service (system crash).
(CVE-2019-17133)

Nicolas Waisman discovered that the Chelsio T4/T5 RDMA Driver for the Linux
kernel performed DMA from a kernel stack. A local attacker could use this
to cause a denial of service (system crash). (CVE-2019-17075)

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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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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-4211-2: linux-image-4.4.0-170-powerpc-e500mc, linux-aws, linux-image-4.4.0-1059-aws, linux-image-aws, linux-image-powerpc-e500mc-lts-xenial, linux-image-4.4.0-170-lowlatency, linux-image-4.4.0-170-powerpc64-smp, linux-image-powerpc-smp-lts-xenial, linux-image-generic-lts-xenial, linux-lts-xenial, linux-image-4.4.0-170-powerpc-smp, linux-image-virtual-lts-xenial, linux-image-lowlatency-lts-xenial, linux-image-powerpc64-smp-lts-xenial, linux-image-powerpc64-emb-lts-xenial, linux-image-4.4.0-170-powerpc64-emb, linux-image-4.4.0-170-generic-lpae, linux-image-generic-lpae-lts-xenial, linux-image-4.4.0-170-generic
  • USN-4118-1: linux-image-aws-hwe, linux-image-4.15.0-1047-aws, linux-aws, linux-image-aws, linux-aws-hwe
  • USN-4115-1: linux-image-4.15.0-60-generic, linux-image-kvm, linux-image-generic-lpae-hwe-16.04, linux-image-virtual, linux-image-azure, linux-image-gcp, linux-image-4.15.0-1041-gcp, linux-oracle, linux-image-4.15.0-60-lowlatency, linux-image-4.15.0-1056-azure, linux-hwe, linux-image-lowlatency-hwe-16.04-edge, linux-image-gke, linux-image-oem, linux-kvm, linux-image-4.15.0-1041-gke, linux-image-lowlatency, linux-image-4.15.0-1043-kvm, linux-gke-4.15, linux-image-virtual-hwe-16.04-edge, linux-image-generic-hwe-16.04-edge, linux-raspi2, linux, linux-image-4.15.0-1044-raspi2, linux-image-raspi2, linux-gcp, linux-image-generic-lpae-hwe-16.04-edge, linux-image-virtual-hwe-16.04, linux-image-4.15.0-60-generic-lpae, linux-image-generic-lpae, linux-image-lowlatency-hwe-16.04, linux-image-generic-hwe-16.04, linux-image-generic, linux-image-oracle, linux-image-4.15.0-1022-oracle, linux-image-gke-4.15, linux-azure
  • USN-4226-1: linux-image-5.0.0-38-generic-lpae, linux-image-5.0.0-38-generic, linux-image-kvm, linux-image-5.0.0-1023-aws, linux-image-gke-5.0, linux-aws, linux-image-oracle-edge, linux-image-aws, linux-image-virtual, linux-image-azure, linux-image-gcp, linux-oracle-5.0, linux-oracle, linux-image-5.0.0-1024-raspi2, linux-image-5.0.0-1024-kvm, linux-aws-5.0, linux-image-gke, linux-kvm, linux-image-lowlatency, linux-raspi2, linux, linux-image-5.0.0-1009-oracle, linux-image-raspi2, linux-gcp, linux-image-5.0.0-1028-gcp, linux-image-oem-osp1, linux-gke-5.0, linux-image-generic-lpae, linux-image-5.0.0-38-lowlatency, linux-image-5.0.0-1033-oem-osp1, linux-image-generic, linux-image-aws-edge, linux-image-oracle, linux-image-5.0.0-1028-azure, linux-azure, linux-oem-osp1, linux-image-5.0.0-1027-gke
  • USN-4208-1: linux-image-5.3.0-24-generic-lpae, linux-image-kvm, linux-aws, linux-image-5.3.0-24-generic, linux-image-aws, linux-image-virtual, linux-image-gcp, linux-oracle, linux-image-5.3.0-24-snapdragon, linux-image-gcp-edge, linux-image-5.3.0-1007-oracle, linux-image-gke, linux-kvm, linux-image-lowlatency, linux, linux-gcp, linux-image-snapdragon, linux-image-generic-lpae, linux-image-5.3.0-24-lowlatency, linux-image-5.3.0-1008-aws, linux-gcp-5.3, linux-image-5.3.0-1008-kvm, linux-image-generic, linux-image-oracle, linux-image-5.3.0-1009-gcp
  • USN-4210-1: linux-image-4.15.0-72-generic, linux-image-kvm, linux-aws, linux-image-generic-lpae-hwe-16.04, linux-image-aws, linux-image-virtual, linux-image-gcp, linux-image-4.15.0-1050-gcp, linux-image-4.15.0-1065-oem, linux-image-4.15.0-72-generic-lpae, linux-oracle, linux-image-4.15.0-1051-kvm, linux-hwe, linux-image-4.15.0-1069-snapdragon, linux-image-lowlatency-hwe-16.04-edge, linux-image-gke, linux-image-oem, linux-aws-hwe, linux-image-lowlatency, linux-image-4.15.0-1030-oracle, linux-image-4.15.0-1056-aws, linux-gke-4.15, linux-image-virtual-hwe-16.04-edge, linux-kvm, linux-image-generic-hwe-16.04-edge, linux-raspi2, linux, linux-image-raspi2, linux-gcp, linux-image-generic-lpae-hwe-16.04-edge, linux-image-aws-lts-18.04, linux-image-snapdragon, linux-image-virtual-hwe-16.04, linux-image-4.15.0-1049-gke, linux-image-generic-lpae, linux-image-4.15.0-1052-raspi2, linux-image-generic-hwe-16.04, linux-image-lowlatency-hwe-16.04, linux-image-oracle-lts-18.04, linux-image-aws-hwe, linux-image-generic, linux-snapdragon, linux-image-oracle, linux-oem, linux-image-gke-4.15, linux-image-4.15.0-72-lowlatency

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Further reading