USN-5002-1: Linux kernel (HWE) vulnerability

Releases

• Ubuntu 18.04 ESM

Packages

• linux-gke-5.3 - Linux kernel for Google Container Engine (GKE) systems
• linux-hwe - Linux hardware enablement (HWE) kernel
• linux-raspi2-5.3 - Linux kernel for Raspberry Pi (V8) systems

Details

Norbert Slusarek discovered a race condition in the CAN BCM networking
protocol of the Linux kernel leading to multiple use-after-free
vulnerabilities. A local attacker could use this issue to execute arbitrary
code.

Update instructions

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

Ubuntu 18.04

• linux-image-gkeop-5.3 - 5.3.0.75.132
• linux-image-gke-5.3 - 5.3.0.1044.27
• linux-image-5.3.0-1044-gke - 5.3.0-1044.47
• linux-image-5.3.0-1041-raspi2 - 5.3.0-1041.43
• linux-image-5.3.0-75-lowlatency - 5.3.0-75.71
• linux-image-5.3.0-75-generic - 5.3.0-75.71
• linux-image-raspi2-hwe-18.04 - 5.3.0.1041.30

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-2021-3609

Related notices

• USN-4997-1: linux-image-5.11.0-1011-aws, linux-image-generic-64k-hwe-20.04, linux-image-gke, linux-image-oem-20.04, linux-image-raspi, linux-image-raspi-nolpae, linux-image-lowlatency, linux-image-azure, linux-image-5.11.0-22-generic-lpae, linux-image-lowlatency-hwe-20.04-edge, linux-image-5.11.0-22-generic, linux-image-generic-64k, linux-image-generic-hwe-20.04-edge, linux-image-5.11.0-1009-azure, linux-image-virtual-hwe-20.04, linux-image-generic-lpae-hwe-20.04, linux-gcp, linux-image-virtual, linux-image-generic-64k-hwe-20.04-edge, linux-raspi, linux-image-5.11.0-22-generic-64k, linux-image-aws, linux-image-5.11.0-1012-raspi, linux-image-generic-lpae-hwe-20.04-edge, linux-oracle, linux-image-generic-hwe-20.04, linux-image-5.11.0-1012-raspi-nolpae, linux-image-virtual-hwe-20.04-edge, linux-image-generic-lpae, linux-image-gcp, linux-image-5.11.0-22-lowlatency, linux, linux-aws, linux-image-generic, linux-azure, linux-image-oracle, linux-image-5.11.0-1011-gcp, linux-image-5.11.0-1010-oracle, linux-image-lowlatency-hwe-20.04
• USN-4999-1: linux-image-gke, linux-image-generic-64k-hwe-20.04, linux-image-oem-20.04, linux-image-raspi, linux-image-raspi-nolpae, linux-image-lowlatency, linux-oracle-5.8, linux-image-azure, linux-image-5.8.0-1029-raspi-nolpae, linux-image-lowlatency-hwe-20.04-edge, linux-image-5.8.0-1036-azure, linux-image-generic-64k, linux-image-generic-hwe-20.04-edge, linux-image-azure-edge, linux-image-virtual-hwe-20.04, linux-image-5.8.0-59-generic-64k, linux-image-generic-lpae-hwe-20.04, linux-gcp, linux-gcp-5.8, linux-image-5.8.0-1030-kvm, linux-image-generic-64k-hwe-20.04-edge, linux-image-virtual, linux-image-5.8.0-59-generic-lpae, linux-kvm, linux-raspi, linux-image-kvm, linux-image-aws, linux-image-oracle-edge, linux-azure-5.8, linux-image-generic-lpae-hwe-20.04-edge, linux-image-5.8.0-59-lowlatency, linux-image-5.8.0-1035-gcp, linux-image-gcp-edge, linux-image-generic-hwe-20.04, linux-image-virtual-hwe-20.04-edge, linux-image-5.8.0-59-generic, linux-image-generic-lpae, linux-image-gcp, linux, linux-aws, linux-image-5.8.0-1033-oracle, linux-image-generic, linux-azure, linux-aws-5.8, linux-image-5.8.0-1029-raspi, linux-image-oracle, linux-image-5.8.0-1038-aws, linux-hwe-5.8, linux-oracle, linux-image-lowlatency-hwe-20.04
• USN-5000-1: linux-image-generic-hwe-18.04-edge, linux-image-virtual-hwe-18.04, linux-image-gke, linux-image-5.4.0-1018-gkeop, linux-image-virtual-hwe-18.04-edge, linux-image-oem, linux-image-5.4.0-1038-raspi, linux-image-raspi, linux-azure-5.4, linux-gke, linux-image-lowlatency, linux-image-azure, linux-image-5.4.0-1051-aws, linux-image-snapdragon-hwe-18.04-edge, linux-image-5.4.0-77-lowlatency, linux-gcp-5.4, linux-image-generic-lpae-hwe-18.04, linux-image-azure-edge, linux-gke-5.4, linux-image-5.4.0-1046-gke, linux-image-gkeop-5.4, linux-gcp, linux-gkeop, linux-image-generic-lpae-hwe-18.04-edge, linux-image-virtual, linux-image-raspi2, linux-image-raspi2-hwe-18.04, linux-raspi, linux-raspi-5.4, linux-image-5.4.0-77-generic, linux-image-gke-5.4, linux-image-aws, linux-image-oracle-edge, linux-image-raspi2-hwe-18.04-edge, linux-image-oracle-lts-20.04, linux-image-aws-edge, linux-image-aws-lts-20.04, linux-image-oem-osp1, linux-gkeop-5.4, linux-image-gcp-lts-20.04, linux-image-gcp-edge, linux-image-5.4.0-77-generic-lpae, linux-oracle-5.4, linux-hwe-5.4, linux-image-gcp, linux-image-generic-lpae, linux-image-gkeop, linux-image-raspi-hwe-18.04-edge, linux-aws-5.4, linux, linux-aws, linux-image-azure-lts-20.04, linux-image-generic, linux-image-raspi-hwe-18.04, linux-image-lowlatency-hwe-18.04, linux-image-snapdragon-hwe-18.04, linux-azure, linux-image-5.4.0-1046-gcp, linux-image-5.4.0-1051-azure, linux-image-5.4.0-1048-oracle, linux-image-oracle, linux-image-lowlatency-hwe-18.04-edge, linux-image-generic-hwe-18.04, linux-oracle
• USN-5001-1: linux-image-oem-20.04b, linux-image-oem-20.04, linux-oem-5.10, linux-image-oem-20.04-edge, linux-image-5.10.0-1033-oem
• USN-5003-1: linux-image-4.15.0-1103-gcp, linux-image-dell300x, linux-image-gke, linux-hwe, linux-image-generic-lpae-hwe-16.04-edge, linux-image-lowlatency-hwe-16.04-edge, linux-image-oem, linux-image-lowlatency, linux-image-azure, linux-dell300x, linux-image-oracle-lts-18.04, linux-image-aws-hwe, linux-image-azure-edge, linux-image-4.15.0-1106-snapdragon, linux-image-4.15.0-1075-oracle, linux-image-generic-hwe-16.04, linux-image-snapdragon, linux-image-4.15.0-147-generic, linux-image-gcp-lts-18.04, linux-gcp, linux-image-virtual, linux-image-lowlatency-hwe-16.04, linux-image-raspi2, linux-image-azure-lts-18.04, linux-image-4.15.0-1022-dell300x, linux-image-generic-hwe-16.04-edge, linux-aws-hwe, linux-image-virtual-hwe-16.04-edge, linux-image-aws-lts-18.04, linux-image-4.15.0-1089-raspi2, linux-image-4.15.0-147-lowlatency, linux-image-generic-lpae-hwe-16.04, linux-snapdragon, linux-raspi2, linux-image-4.15.0-1118-azure, linux-image-generic-lpae, linux-image-gcp, linux-gcp-4.15, linux, linux-aws, linux-image-virtual-hwe-16.04, linux-image-4.15.0-147-generic-lpae, linux-image-generic, linux-azure, linux-image-4.15.0-1106-aws, linux-image-oracle, linux-azure-4.15, linux-oracle
• USN-5000-2: linux-image-unsigned-5.4.0-1041-kvm, linux-kvm-tools-5.4.0-1041, linux-image-kvm, linux-tools-kvm, linux-headers-kvm, linux-kvm-headers-5.4.0-1041, linux-buildinfo-5.4.0-1041-kvm, linux-modules-5.4.0-1041-kvm, linux-tools-5.4.0-1041-kvm, linux-kvm, linux-image-5.4.0-1041-kvm, linux-headers-5.4.0-1041-kvm
• USN-4997-2: linux-tools-kvm, linux-image-kvm, linux-tools-5.11.0-1009-kvm, linux-headers-5.11.0-1009-kvm, linux-headers-kvm, linux-image-5.11.0-1009-kvm, linux-modules-5.11.0-1009-kvm, linux-kvm-tools-5.11.0-1009, linux-image-unsigned-5.11.0-1009-kvm, linux-buildinfo-5.11.0-1009-kvm, linux-kvm-headers-5.11.0-1009, linux-kvm
• LSN-0078-1: gkeop-5.4, gke, lowlatency-5.4, generic-4.15, generic-5.4, lowlatency-4.15, oem, gke-5.4, gkeop, gke-4.15, gcp
• USN-5082-1: linux-image-unsigned-5.13.0-1012-oem, linux-headers-oem-20.04c, linux-oem-5.13-tools-5.13.0-1012, linux-headers-5.13.0-1012-oem, linux-tools-oem-20.04c, linux-image-oem-20.04c, linux-oem-5.13-tools-host, linux-modules-5.13.0-1012-oem, linux-oem-20.04c, linux-oem-5.13, linux-oem-5.13-headers-5.13.0-1012, linux-image-5.13.0-1012-oem, linux-buildinfo-5.13.0-1012-oem, linux-tools-5.13.0-1012-oem
• USN-5505-1: linux-headers-generic-lts-xenial, linux-modules-4.4.0-229-lowlatency, linux-kvm-headers-4.4.0-1110, linux-headers-4.4.0-1110-kvm, linux-headers-virtual-lts-xenial, linux-lts-xenial-cloud-tools-4.4.0-229, linux-buildinfo-4.4.0-1110-kvm, linux-tools-4.4.0-229-generic, linux-lts-xenial, linux-cloud-tools-virtual-lts-xenial, linux-image-generic-lts-xenial, linux-tools-4.4.0-1110-kvm, linux-cloud-tools-4.4.0-229-generic, linux-headers-4.4.0-229-generic, linux-tools-generic-lts-xenial, linux-cloud-tools-lowlatency-lts-xenial, linux-image-extra-virtual-lts-xenial, linux-tools-lowlatency-lts-xenial, linux-signed-lowlatency-lts-xenial, linux-cloud-tools-4.4.0-229-lowlatency, linux-modules-extra-4.4.0-229-generic, linux-buildinfo-4.4.0-229-generic, linux-generic-lts-xenial, linux-image-4.4.0-1110-kvm, linux-image-unsigned-4.4.0-229-generic, linux-kvm, linux-kvm-cloud-tools-4.4.0-1110, linux-image-4.4.0-229-generic, linux-image-virtual-lts-xenial, linux-buildinfo-4.4.0-229-lowlatency, linux-image-kvm, linux-kvm-tools-4.4.0-1110, linux-signed-generic-lts-xenial, linux-headers-kvm, linux-image-lowlatency-lts-xenial, linux-modules-4.4.0-229-generic, linux-modules-4.4.0-1110-kvm, linux-tools-4.4.0-229-lowlatency, linux-headers-4.4.0-229, linux-signed-image-lowlatency-lts-xenial, linux-lts-xenial-tools-4.4.0-229, linux-lowlatency-lts-xenial, linux-tools-kvm, linux-cloud-tools-4.4.0-1110-kvm, linux-cloud-tools-generic-lts-xenial, linux-image-unsigned-4.4.0-229-lowlatency, linux-signed-image-generic-lts-xenial, linux-headers-4.4.0-229-lowlatency, linux-virtual-lts-xenial, linux-headers-lowlatency-lts-xenial, linux-image-4.4.0-229-lowlatency, linux-tools-virtual-lts-xenial
• USN-5513-1: linux-cloud-tools-4.4.0-1109-aws, linux-aws, linux-image-4.4.0-1109-aws, linux-image-aws, linux-buildinfo-4.4.0-1109-aws, linux-aws-headers-4.4.0-1109, linux-headers-4.4.0-1109-aws, linux-headers-aws, linux-modules-4.4.0-1109-aws, linux-tools-aws, linux-tools-4.4.0-1109-aws, linux-aws-cloud-tools-4.4.0-1109, linux-aws-tools-4.4.0-1109