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