1. Ubuntu Security Notices
  2. USN-4005-1

USN-4005-1: Linux kernel vulnerabilities

Publication date

4 June 2019

Overview

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-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)

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)

Update instructions

After a standard system update you need to reboot your computer to make all the necessary changes.

Learn more about how to get the fixes.

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.

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

Ubuntu Release Package Version
19.04 disco linux-image-5.0.0-1007-aws –  5.0.0-1007.7
linux-image-5.0.0-1007-gcp –  5.0.0-1007.7
linux-image-5.0.0-1007-kvm –  5.0.0-1007.7
linux-image-5.0.0-1009-raspi2 –  5.0.0-1009.9
linux-image-5.0.0-1013-snapdragon –  5.0.0-1013.13
linux-image-5.0.0-16-generic –  5.0.0-16.17
linux-image-5.0.0-16-generic-lpae –  5.0.0-16.17
linux-image-5.0.0-16-lowlatency –  5.0.0-16.17
linux-image-aws –  5.0.0.1007.7
linux-image-gcp –  5.0.0.1007.7
linux-image-generic –  5.0.0.16.17
linux-image-generic-lpae –  5.0.0.16.17
linux-image-gke –  5.0.0.1007.7
linux-image-kvm –  5.0.0.1007.7
linux-image-lowlatency –  5.0.0.16.17
linux-image-raspi2 –  5.0.0.1009.6
linux-image-snapdragon –  5.0.0.1013.6

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References

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