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USN-4005-1: Linux kernel vulnerabilities

4 June 2019

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

  • linux - Linux kernel
  • linux-aws - Linux kernel for Amazon Web Services (AWS) systems
  • linux-gcp - Linux kernel for Google Cloud Platform (GCP) systems
  • linux-kvm - Linux kernel for cloud environments
  • linux-raspi2 - Linux kernel for Raspberry Pi 2
  • linux-snapdragon - Linux kernel for Snapdragon processors

Details

It was discovered that a null pointer dereference vulnerability existed in
the LSI Logic MegaRAID driver in the Linux kernel. A local attacker could
use this to cause a denial of service (system crash). (CVE-2019-11810)

It was discovered that a race condition leading to a use-after-free existed
in the Reliable Datagram Sockets (RDS) protocol implementation in the Linux
kernel. The RDS protocol is disabled via blocklist by default in Ubuntu.
If enabled, a local attacker could use this to cause a denial of service
(system crash) or possibly execute arbitrary code. (CVE-2019-11815)

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 19.04

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-4118-1: linux-aws, linux-image-4.15.0-1047-aws, linux-aws-hwe, linux-image-aws-hwe, linux-image-aws
  • USN-4115-1: linux-image-4.15.0-1044-raspi2, linux-image-gke-4.15, linux-image-lowlatency, linux-image-raspi2, linux-image-virtual, linux-oracle, linux, linux-image-gcp, linux-image-generic-lpae-hwe-16.04, linux-kvm, linux-image-generic-hwe-16.04, linux-image-oem, linux-image-4.15.0-60-generic-lpae, linux-image-generic-lpae, linux-azure, linux-image-4.15.0-60-lowlatency, linux-image-4.15.0-1041-gcp, linux-image-4.15.0-60-generic, linux-image-4.15.0-1022-oracle, linux-image-4.15.0-1041-gke, linux-hwe, linux-image-virtual-hwe-16.04-edge, linux-image-azure, linux-image-4.15.0-1043-kvm, linux-image-virtual-hwe-16.04, linux-image-generic-hwe-16.04-edge, linux-image-lowlatency-hwe-16.04, linux-image-generic-lpae-hwe-16.04-edge, linux-image-gke, linux-image-lowlatency-hwe-16.04-edge, linux-image-kvm, linux-image-oracle, linux-image-4.15.0-1056-azure, linux-image-generic, linux-gcp, linux-gke-4.15, linux-raspi2
  • USN-4008-1: linux-image-4.4.0-150-powerpc64-smp, linux-image-4.4.0-1114-snapdragon, linux-image-powerpc64-smp-lts-utopic, linux-image-lowlatency-lts-vivid, linux-image-powerpc-smp-lts-wily, linux-image-generic-lts-xenial, linux-image-lowlatency, linux-image-raspi2, linux-image-virtual, linux-image-virtual-lts-wily, linux-image-4.4.0-1110-raspi2, linux-image-4.4.0-150-powerpc-e500mc, linux-image-powerpc64-emb, linux-image-virtual-lts-vivid, linux, linux-image-generic-lpae-lts-utopic, linux-image-powerpc-e500mc-lts-wily, linux-image-virtual-lts-utopic, linux-kvm, linux-image-powerpc-e500mc, linux-image-4.4.0-150-lowlatency, linux-image-generic-lts-wily, linux-image-lowlatency-lts-utopic, linux-image-powerpc64-smp, linux-snapdragon, linux-image-4.4.0-150-powerpc64-emb, linux-image-powerpc64-smp-lts-vivid, linux-image-generic-lpae, linux-image-powerpc-e500mc-lts-utopic, linux-image-4.4.0-150-generic, linux-image-lowlatency-lts-wily, linux-image-powerpc-e500mc-lts-vivid, linux-image-4.4.0-150-generic-lpae, linux-raspi2, linux-image-powerpc-smp-lts-vivid, linux-image-powerpc64-emb-lts-utopic, linux-image-powerpc64-emb-lts-vivid, linux-image-powerpc64-emb-lts-wily, linux-image-lowlatency-lts-xenial, linux-image-powerpc64-smp-lts-xenial, linux-image-snapdragon, linux-aws, linux-image-4.4.0-150-powerpc-smp, linux-image-powerpc-e500mc-lts-xenial, linux-image-4.4.0-1047-kvm, linux-image-generic-lts-vivid, linux-image-aws, linux-image-powerpc-smp, linux-image-virtual-lts-xenial, linux-image-kvm, linux-image-generic-lts-utopic, linux-image-powerpc64-emb-lts-xenial, linux-image-powerpc64-smp-lts-wily, linux-image-generic-lpae-lts-xenial, linux-image-generic, linux-image-4.4.0-1084-aws, linux-image-powerpc-smp-lts-xenial, linux-image-powerpc-smp-lts-utopic, linux-image-generic-lpae-lts-wily, linux-image-generic-lpae-lts-vivid
  • USN-4008-3: linux-image-4.4.0-150-powerpc64-smp, linux-image-generic-lts-xenial, linux-image-4.4.0-150-powerpc-e500mc, linux-image-4.4.0-150-lowlatency, linux-image-4.4.0-150-powerpc64-emb, linux-image-4.4.0-150-generic, linux-image-4.4.0-1045-aws, linux-image-4.4.0-150-generic-lpae, linux-image-lowlatency-lts-xenial, linux-image-powerpc64-smp-lts-xenial, linux-aws, linux-image-4.4.0-150-powerpc-smp, linux-image-powerpc-e500mc-lts-xenial, linux-image-virtual-lts-xenial, linux-image-aws, linux-image-powerpc64-emb-lts-xenial, linux-image-generic-lpae-lts-xenial, linux-image-powerpc-smp-lts-xenial, linux-lts-xenial
  • USN-4068-2: linux-image-gke, linux-image-virtual-hwe-16.04, linux-image-4.15.0-1037-gcp, linux-image-4.15.0-55-generic, linux-image-lowlatency-hwe-16.04, linux-gcp, linux-image-4.15.0-55-lowlatency, linux-image-oem, linux-image-gcp, linux-image-generic-lpae-hwe-16.04, linux-hwe, linux-image-4.15.0-55-generic-lpae, linux-image-generic-hwe-16.04
  • USN-4068-1: linux-image-4.15.0-1018-oracle, linux-image-lowlatency, linux-image-raspi2, linux-image-virtual, linux-image-4.15.0-1058-snapdragon, linux-image-4.15.0-1044-aws, linux-oracle, linux, linux-image-gcp, linux-image-generic-lpae-hwe-16.04, linux-kvm, linux-image-generic-hwe-16.04, linux-snapdragon, linux-image-4.15.0-1039-kvm, linux-image-generic-lpae, linux-image-virtual-hwe-16.04-edge, linux-image-snapdragon, linux-aws, linux-image-virtual-hwe-16.04, linux-image-4.15.0-1037-gcp, linux-image-4.15.0-55-generic, linux-image-generic-hwe-16.04-edge, linux-image-lowlatency-hwe-16.04, linux-image-4.15.0-55-lowlatency, linux-image-generic-lpae-hwe-16.04-edge, linux-image-aws, linux-image-4.15.0-55-generic-lpae, linux-image-lowlatency-hwe-16.04-edge, linux-image-kvm, linux-image-oracle, linux-image-4.15.0-1041-raspi2, linux-image-generic, linux-gcp, linux-raspi2