Ubuntu 4877-1 Critical: Multiple Kernel Issues and Threat Mitigation

ubuntu

March 16, 2021

Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux: Linux kernel

- linux-aws: Linux kernel for Amazon Web Services (AWS) systems

- linux-azure-4.15: Linux kernel for Microsoft Azure Cloud systems

- linux-dell300x: Linux kernel for Dell 300x platforms

- linux-gcp-4.15: Linux kernel for Google Cloud Platform (GCP) systems

- linux-kvm: Linux kernel for cloud environments

- linux-oracle: Linux kernel for Oracle Cloud systems

- linux-raspi2: Linux kernel for Raspberry Pi (V8) systems

- linux-snapdragon: Linux kernel for Qualcomm Snapdragon processors

- linux-aws-hwe: Linux kernel for Amazon Web Services (AWS-HWE) systems

- linux-azure: Linux kernel for Microsoft Azure Cloud systems

- linux-gcp: Linux kernel for Google Cloud Platform (GCP) systems

- linux-hwe: Linux hardware enablement (HWE) kernel

Details:

It was discovered that the Marvell WiFi-Ex device driver in the Linux

kernel did not properly validate ad-hoc SSIDs. A local...

Read the Full Advisory

Topics Covered

security advisory denial of service security update access control kernel ubuntu system crash

Update Instructions

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

Ubuntu 18.04 LTS:
  linux-image-4.15.0-1013-dell300x  4.15.0-1013.17
  linux-image-4.15.0-1066-oracle  4.15.0-1066.74
  linux-image-4.15.0-1080-raspi2  4.15.0-1080.85
  linux-image-4.15.0-1086-kvm     4.15.0-1086.88
  linux-image-4.15.0-1094-gcp     4.15.0-1094.107
  linux-image-4.15.0-1095-aws     4.15.0-1095.102
  linux-image-4.15.0-1097-snapdragon  4.15.0-1097.106
  linux-image-4.15.0-1109-azure   4.15.0-1109.121
  linux-image-4.15.0-137-generic  4.15.0-137.141
  linux-image-4.15.0-137-generic-lpae  4.15.0-137.141
  linux-image-4.15.0-137-lowlatency  4.15.0-137.141
  linux-image-aws-lts-18.04       4.15.0.1095.98
  linux-image-azure-lts-18.04     4.15.0.1109.82
  linux-image-dell300x            4.15.0.1013.15
  linux-image-gcp-lts-18.04       4.15.0.1094.112
  linux-image-generic             4.15.0.137.124
  linux-image-generic-lpae        4.15.0.137.124
  linux-image-kvm                 4.15.0.1086.82
  linux-image-lowlatency          4.15.0.137.124
  linux-image-oracle-lts-18.04    4.15.0.1066.76
  linux-image-powerpc-e500mc      4.15.0.137.124
  linux-image-powerpc-smp         4.15.0.137.124
  linux-image-powerpc64-emb       4.15.0.137.124
  linux-image-powerpc64-smp       4.15.0.137.124
  linux-image-raspi2              4.15.0.1080.77
  linux-image-snapdragon          4.15.0.1097.100
  linux-image-virtual             4.15.0.137.124

Ubuntu 16.04 LTS:
  linux-image-4.15.0-1066-oracle  4.15.0-1066.74~16.04.1
  linux-image-4.15.0-1094-gcp     4.15.0-1094.107~16.04.1
  linux-image-4.15.0-1095-aws     4.15.0-1095.102~16.04.1
  linux-image-4.15.0-1109-azure   4.15.0-1109.121~16.04.1
  linux-image-4.15.0-137-generic  4.15.0-137.141~16.04.1
  linux-image-4.15.0-137-generic-lpae  4.15.0-137.141~16.04.1
  linux-image-4.15.0-137-lowlatency  4.15.0-137.141~16.04.1
  linux-image-aws-hwe             4.15.0.1095.88
  linux-image-azure               4.15.0.1109.100
  linux-image-gcp                 4.15.0.1094.95
  linux-image-generic-hwe-16.04   4.15.0.137.133
  linux-image-generic-lpae-hwe-16.04  4.15.0.137.133
  linux-image-gke                 4.15.0.1094.95
  linux-image-lowlatency-hwe-16.04  4.15.0.137.133
  linux-image-oem                 4.15.0.137.133
  linux-image-oracle              4.15.0.1066.54
  linux-image-virtual-hwe-16.04   4.15.0.137.133

Ubuntu 14.04 ESM:
  linux-image-4.15.0-1109-azure   4.15.0-1109.121~14.04.1
  linux-image-azure               4.15.0.1109.82

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.