Ubuntu 18.04 LTS USN-4660-1 Moderate: Linux Kernel Security Issues

ubuntu

December 2, 2020

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

- linux-gke-4.15: Linux kernel for Google Container Engine (GKE) systems

- linux-kvm: Linux kernel for cloud environments

- linux-oem: Linux kernel for OEM systems

- 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 a race condition existed in the perf subsystem of

the Linux ker...

Read the Full Advisory

Topics Covered

security advisory moderate denial of service Ubuntu kernel Linux issues

Update Instructions

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

Ubuntu 18.04 LTS:
  linux-image-4.15.0-1059-oracle  4.15.0-1059.65
  linux-image-4.15.0-1074-gke     4.15.0-1074.79
  linux-image-4.15.0-1074-raspi2  4.15.0-1074.79
  linux-image-4.15.0-1079-kvm     4.15.0-1079.81
  linux-image-4.15.0-1088-aws     4.15.0-1088.93
  linux-image-4.15.0-1088-gcp     4.15.0-1088.101
  linux-image-4.15.0-1091-snapdragon  4.15.0-1091.100
  linux-image-4.15.0-1100-azure   4.15.0-1100.111
  linux-image-4.15.0-1103-oem     4.15.0-1103.114
  linux-image-4.15.0-126-generic  4.15.0-126.129
  linux-image-4.15.0-126-generic-lpae  4.15.0-126.129
  linux-image-4.15.0-126-lowlatency  4.15.0-126.129
  linux-image-aws-lts-18.04       4.15.0.1088.90
  linux-image-azure-lts-18.04     4.15.0.1100.73
  linux-image-gcp-lts-18.04       4.15.0.1088.106
  linux-image-generic             4.15.0.126.113
  linux-image-generic-lpae        4.15.0.126.113
  linux-image-gke                 4.15.0.1074.78
  linux-image-gke-4.15            4.15.0.1074.78
  linux-image-kvm                 4.15.0.1079.75
  linux-image-lowlatency          4.15.0.126.113
  linux-image-oem                 4.15.0.1103.107
  linux-image-oracle-lts-18.04    4.15.0.1059.69
  linux-image-powerpc-e500mc      4.15.0.126.113
  linux-image-powerpc-smp         4.15.0.126.113
  linux-image-powerpc64-emb       4.15.0.126.113
  linux-image-powerpc64-smp       4.15.0.126.113
  linux-image-raspi2              4.15.0.1074.71
  linux-image-snapdragon          4.15.0.1091.94
  linux-image-virtual             4.15.0.126.113

Ubuntu 16.04 LTS:
  linux-image-4.15.0-1059-oracle  4.15.0-1059.65~16.04.1
  linux-image-4.15.0-1088-aws     4.15.0-1088.93~16.04.1
  linux-image-4.15.0-1088-gcp     4.15.0-1088.101~16.04.1
  linux-image-4.15.0-1100-azure   4.15.0-1100.111~16.04.1
  linux-image-4.15.0-126-generic  4.15.0-126.129~16.04.1
  linux-image-4.15.0-126-generic-lpae  4.15.0-126.129~16.04.1
  linux-image-4.15.0-126-lowlatency  4.15.0-126.129~16.04.1
  linux-image-aws-hwe             4.15.0.1088.82
  linux-image-azure               4.15.0.1100.93
  linux-image-azure-edge          4.15.0.1100.93
  linux-image-gcp                 4.15.0.1088.89
  linux-image-generic-hwe-16.04   4.15.0.126.125
  linux-image-generic-lpae-hwe-16.04  4.15.0.126.125
  linux-image-gke                 4.15.0.1088.89
  linux-image-lowlatency-hwe-16.04  4.15.0.126.125
  linux-image-oem                 4.15.0.126.125
  linux-image-oracle              4.15.0.1059.48
  linux-image-virtual-hwe-16.04   4.15.0.126.125

Ubuntu 14.04 ESM:
  linux-image-4.15.0-1100-azure   4.15.0-1100.111~14.04.1
  linux-image-azure               4.15.0.1100.75

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.