USN-4005-1: Linux kernel vulnerabilities

Releases

• Ubuntu 19.04

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)

Update instructions

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

Ubuntu 19.04

• 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

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

• CVE-2019-11810
• CVE-2019-11815

Related notices

• USN-4118-1
• USN-4115-1
• USN-4008-1
• USN-4008-3
• USN-4068-2
• USN-4068-1