Ubuntu 18.04 LTS: USN-5044-1 Critical: Bluetooth and NFC Issues

ubuntu

August 17, 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-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 bluetooth subsystem in the Linux kernel did not

properly handle HCI device initialization failure, leading to a double-free

vulnerability. An attacker could use this to cause...

Read the Full Advisory

Topics Covered

security advisory critical ubuntu linux kernel bluetooth issue nfc issue

Update Instructions

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

Ubuntu 18.04 LTS:
  linux-image-4.15.0-1079-oracle  4.15.0-1079.87
  linux-image-4.15.0-1094-raspi2  4.15.0-1094.100
  linux-image-4.15.0-1098-kvm     4.15.0-1098.100
  linux-image-4.15.0-1107-gcp     4.15.0-1107.121
  linux-image-4.15.0-1110-aws     4.15.0-1110.117
  linux-image-4.15.0-1111-snapdragon  4.15.0-1111.120
  linux-image-4.15.0-1122-azure   4.15.0-1122.135
  linux-image-4.15.0-154-generic  4.15.0-154.161
  linux-image-4.15.0-154-generic-lpae  4.15.0-154.161
  linux-image-4.15.0-154-lowlatency  4.15.0-154.161
  linux-image-aws-lts-18.04       4.15.0.1110.113
  linux-image-azure-lts-18.04     4.15.0.1122.95
  linux-image-gcp-lts-18.04       4.15.0.1107.126
  linux-image-generic             4.15.0.154.143
  linux-image-generic-lpae        4.15.0.154.143
  linux-image-kvm                 4.15.0.1098.94
  linux-image-lowlatency          4.15.0.154.143
  linux-image-oracle-lts-18.04    4.15.0.1079.89
  linux-image-raspi2              4.15.0.1094.92
  linux-image-snapdragon          4.15.0.1111.114
  linux-image-virtual             4.15.0.154.143

Ubuntu 16.04 ESM:
  linux-image-4.15.0-1107-gcp     4.15.0-1107.121~16.04.1
  linux-image-4.15.0-1110-aws     4.15.0-1110.117~16.04.1
  linux-image-4.15.0-154-generic  4.15.0-154.161~16.04.1
  linux-image-4.15.0-154-lowlatency  4.15.0-154.161~16.04.1
  linux-image-aws-hwe             4.15.0.1110.101
  linux-image-gcp                 4.15.0.1107.108
  linux-image-generic-hwe-16.04   4.15.0.154.148
  linux-image-gke                 4.15.0.1107.108
  linux-image-lowlatency-hwe-16.04  4.15.0.154.148
  linux-image-oem                 4.15.0.154.148
  linux-image-virtual-hwe-16.04   4.15.0.154.148

Ubuntu 14.04 ESM:
  linux-image-4.15.0-1122-azure   4.15.0-1122.135~14.04.1
  linux-image-azure               4.15.0.1122.95

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.