=========================================================================
Ubuntu Security Notice USN-5418-1
May 12, 2022

linux, linux-aws, linux-aws-hwe, linux-azure, linux-azure-4.15,
linux-dell300x, linux-gcp, linux-gcp-4.15, linux-hwe, linux-kvm,
linux-oracle, 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-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-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:

Ke Sun, Alyssa Milburn, Henrique Kawakami, Emma Benoit, Igor Chervatyuk,
Lisa Aichele, and Thais Moreira Hamasaki discovered that the Spectre
Variant 2 mitigations for AMD processors on Linux were insufficient
in some situations. A local attacker could possibly use this to expose
sensitive information. (CVE-2021-26401)

Demi Marie Obenour and Simon Gaiser discovered that several Xen para-
virtualization device frontends did not properly restrict the access
rights of device backends. An attacker could possibly use a malicious Xen
backend to gain access to memory pages of a guest VM or cause a denial
of service in the guest. (CVE-2022-23036, CVE-2022-23037, CVE-2022-23038,
CVE-2022-23039, CVE-2022-23040, CVE-2022-23042)

It was discovered that the USB Gadget file system interface in the Linux
kernel contained a use-after-free vulnerability. A local attacker could
use this to cause a denial of service (system crash) or possibly execute
arbitrary code. (CVE-2022-24958)

It was discovered that the USB gadget subsystem in the Linux kernel did not
properly validate interface descriptor requests. An attacker could possibly
use this to cause a denial of service (system crash). (CVE-2022-25258)

It was discovered that the Remote NDIS (RNDIS) USB gadget implementation in
the Linux kernel did not properly validate the size of the RNDIS_MSG_SET
command. An attacker could possibly use this to expose sensitive
information (kernel memory). (CVE-2022-25375)

It was discovered that the ST21NFCA NFC driver in the Linux kernel did not
properly validate the size of certain data in EVT_TRANSACTION events. A
physically proximate attacker could use this to cause a denial of service
(system crash) or possibly execute arbitrary code. (CVE-2022-26490)

It was discovered that the USB SR9700 ethernet device driver for the
Linux kernel did not properly validate the length of requests from the
device. A physically proximate attacker could possibly use this to expose
sensitive information (kernel memory). (CVE-2022-26966)

It was discovered that the Xilinx USB2 device gadget driver in the
Linux kernel did not properly validate endpoint indices from the host. A
physically proximate attacker could possibly use this to cause a denial
of service (system crash). (CVE-2022-27223)

Update instructions:

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

Ubuntu 18.04 LTS:
  linux-image-4.15.0-1042-dell300x  4.15.0-1042.47
  linux-image-4.15.0-1093-oracle  4.15.0-1093.102
  linux-image-4.15.0-1114-kvm     4.15.0-1114.117
  linux-image-4.15.0-1122-gcp     4.15.0-1122.136
  linux-image-4.15.0-1127-snapdragon  4.15.0-1127.136
  linux-image-4.15.0-1128-aws     4.15.0-1128.137
  linux-image-4.15.0-1138-azure   4.15.0-1138.151
  linux-image-4.15.0-177-generic  4.15.0-177.186
  linux-image-4.15.0-177-generic-lpae  4.15.0-177.186
  linux-image-4.15.0-177-lowlatency  4.15.0-177.186
  linux-image-aws-lts-18.04       4.15.0.1128.131
  linux-image-azure-lts-18.04     4.15.0.1138.111
  linux-image-dell300x            4.15.0.1042.44
  linux-image-gcp-lts-18.04       4.15.0.1122.141
  linux-image-generic             4.15.0.177.166
  linux-image-generic-lpae        4.15.0.177.166
  linux-image-kvm                 4.15.0.1114.110
  linux-image-lowlatency          4.15.0.177.166
  linux-image-oracle-lts-18.04    4.15.0.1093.103
  linux-image-snapdragon          4.15.0.1127.130
  linux-image-virtual             4.15.0.177.166

Ubuntu 16.04 ESM:
  linux-image-4.15.0-1093-oracle  4.15.0-1093.102~16.04.1
  linux-image-4.15.0-1122-gcp     4.15.0-1122.136~16.04.1
  linux-image-4.15.0-1128-aws-hwe  4.15.0-1128.137~16.04.1
  linux-image-4.15.0-1138-azure   4.15.0-1138.151~16.04.1
  linux-image-4.15.0-177-generic  4.15.0-177.186~16.04.1
  linux-image-4.15.0-177-lowlatency  4.15.0-177.186~16.04.1
  linux-image-aws-hwe             4.15.0.1128.118
  linux-image-azure               4.15.0.1138.128
  linux-image-gcp                 4.15.0.1122.123
  linux-image-generic-hwe-16.04   4.15.0.177.169
  linux-image-gke                 4.15.0.1122.123
  linux-image-lowlatency-hwe-16.04  4.15.0.177.169
  linux-image-oem                 4.15.0.177.169
  linux-image-oracle              4.15.0.1093.81
  linux-image-virtual-hwe-16.04   4.15.0.177.169

Ubuntu 14.04 ESM:
  linux-image-4.15.0-1138-azure   4.15.0-1138.151~14.04.1
  linux-image-azure               4.15.0.1138.110

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-5418-1
  CVE-2021-26401, CVE-2022-23036, CVE-2022-23037, CVE-2022-23038,
  CVE-2022-23039, CVE-2022-23040, CVE-2022-23042, CVE-2022-24958,
  CVE-2022-25258, CVE-2022-25375, CVE-2022-26490, CVE-2022-26966,
  CVE-2022-27223

Package Information:
  https://launchpad.net/ubuntu/+source/linux/4.15.0-177.186
  https://launchpad.net/ubuntu/+source/linux-aws/4.15.0-1128.137
  https://launchpad.net/ubuntu/+source/linux-azure-4.15/4.15.0-1138.151
  https://launchpad.net/ubuntu/+source/linux-dell300x/4.15.0-1042.47
  https://launchpad.net/ubuntu/+source/linux-gcp-4.15/4.15.0-1122.136
  https://launchpad.net/ubuntu/+source/linux-kvm/4.15.0-1114.117
  https://launchpad.net/ubuntu/+source/linux-oracle/4.15.0-1093.102
  https://launchpad.net/ubuntu/+source/linux-snapdragon/4.15.0-1127.136