Ubuntu 4946-1 Moderate: Denial Of Service Risk In Linux Kernel

ubuntu

May 11, 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-gcp: Linux kernel for Google Cloud Platform (GCP) systems

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

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

Details:

It was discovered that the DRM subsystem in the Linux kernel contained

double-free vulnerabilities. A privileged attacker co...

Read the Full Advisory

Topics Covered

security advisory moderate denial of service security fix Ubuntu kernel ubuntu memory exhaustion system crash linux kernel

Update Instructions

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

Ubuntu 18.04 LTS:
  linux-image-4.15.0-1018-dell300x  4.15.0-1018.22
  linux-image-4.15.0-1071-oracle  4.15.0-1071.79
  linux-image-4.15.0-1085-raspi2  4.15.0-1085.90
  linux-image-4.15.0-1091-kvm     4.15.0-1091.93
  linux-image-4.15.0-1099-gcp     4.15.0-1099.112
  linux-image-4.15.0-1102-aws     4.15.0-1102.109
  linux-image-4.15.0-1102-snapdragon  4.15.0-1102.111
  linux-image-4.15.0-1114-azure   4.15.0-1114.127
  linux-image-4.15.0-143-generic  4.15.0-143.147
  linux-image-4.15.0-143-generic-lpae  4.15.0-143.147
  linux-image-4.15.0-143-lowlatency  4.15.0-143.147
  linux-image-aws-lts-18.04       4.15.0.1102.105
  linux-image-azure-lts-18.04     4.15.0.1114.87
  linux-image-dell300x            4.15.0.1018.20
  linux-image-gcp-lts-18.04       4.15.0.1099.117
  linux-image-generic             4.15.0.143.130
  linux-image-generic-lpae        4.15.0.143.130
  linux-image-kvm                 4.15.0.1091.87
  linux-image-lowlatency          4.15.0.143.130
  linux-image-oracle-lts-18.04    4.15.0.1071.81
  linux-image-raspi2              4.15.0.1085.82
  linux-image-snapdragon          4.15.0.1102.105
  linux-image-virtual             4.15.0.143.130

Ubuntu 16.04 ESM:
  linux-image-4.15.0-1071-oracle  4.15.0-1071.79~16.04.1
  linux-image-4.15.0-1099-gcp     4.15.0-1099.112~16.04.1
  linux-image-4.15.0-1102-aws     4.15.0-1102.109~16.04.1
  linux-image-4.15.0-143-generic  4.15.0-143.147~16.04.3
  linux-image-4.15.0-143-lowlatency  4.15.0-143.147~16.04.3
  linux-image-aws-hwe             4.15.0.1102.93
  linux-image-gcp                 4.15.0.1099.100
  linux-image-generic-hwe-16.04   4.15.0.143.139
  linux-image-gke                 4.15.0.1099.100
  linux-image-lowlatency-hwe-16.04  4.15.0.143.139
  linux-image-oem                 4.15.0.143.139
  linux-image-oracle              4.15.0.1071.59
  linux-image-virtual-hwe-16.04   4.15.0.143.139

Ubuntu 14.04 ESM:
  linux-image-4.15.0-1114-azure   4.15.0-1114.127~14.04.1
  linux-image-azure               4.15.0.1114.87

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.