=========================================================================Ubuntu Security Notice USN-5044-1
August 18, 2021

linux, linux-aws, linux-aws-hwe, linux-azure, linux-azure-4.15, linux-gcp,
linux-gcp-4.15, linux-hwe, linux-kvm, linux-oracle, linux-raspi2,
linux-snapdragon vulnerabilities
=========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 18.04 LTS
- Ubuntu 16.04 ESM
- Ubuntu 14.04 ESM

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 a denial of service or
possibly execute arbitrary code. (CVE-2021-3564)

It was discovered that the bluetooth subsystem in the Linux kernel did not
properly handle HCI device detach events, leading to a use-after-free
vulnerability. An attacker could use this to cause a denial of service or
possibly execute arbitrary code. (CVE-2021-3573)

It was discovered that the NFC implementation in the Linux kernel did not
properly handle failed connect events leading to a NULL pointer
dereference. A local attacker could use this to cause a denial of service.
(CVE-2021-3587)

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.

References:
  https://ubuntu.com/security/notices/USN-5044-1
  CVE-2021-3564, CVE-2021-3573, CVE-2021-3587

Package Information:
  https://launchpad.net/ubuntu/+source/linux/4.15.0-154.161
  https://launchpad.net/ubuntu/+source/linux-aws/4.15.0-1110.117
  https://launchpad.net/ubuntu/+source/linux-azure-4.15/4.15.0-1122.135
  https://launchpad.net/ubuntu/+source/linux-gcp-4.15/4.15.0-1107.121
  https://launchpad.net/ubuntu/+source/linux-kvm/4.15.0-1098.100
  https://launchpad.net/ubuntu/+source/linux-oracle/4.15.0-1079.87
  https://launchpad.net/ubuntu/+source/linux-raspi2/4.15.0-1094.100
  https://launchpad.net/ubuntu/+source/linux-snapdragon/4.15.0-1111.120

Ubuntu 5044-1: Linux kernel vulnerabilities

August 17, 2021
Several security issues were fixed in the Linux kernel.

Summary

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.

References

https://ubuntu.com/security/notices/USN-5044-1

CVE-2021-3564, CVE-2021-3573, CVE-2021-3587

Severity
August 18, 2021

Package Information

https://launchpad.net/ubuntu/+source/linux/4.15.0-154.161 https://launchpad.net/ubuntu/+source/linux-aws/4.15.0-1110.117 https://launchpad.net/ubuntu/+source/linux-azure-4.15/4.15.0-1122.135 https://launchpad.net/ubuntu/+source/linux-gcp-4.15/4.15.0-1107.121 https://launchpad.net/ubuntu/+source/linux-kvm/4.15.0-1098.100 https://launchpad.net/ubuntu/+source/linux-oracle/4.15.0-1079.87 https://launchpad.net/ubuntu/+source/linux-raspi2/4.15.0-1094.100 https://launchpad.net/ubuntu/+source/linux-snapdragon/4.15.0-1111.120

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