Ubuntu Security Notices
USN-5413-1

USN-5413-1: Linux kernel vulnerabilities

Publication date

12 May 2022

Overview

Several security issues were fixed in the Linux kernel.

Releases

16.04 LTS 14.04 LTS

Packages

linux - Linux kernel
linux-aws - Linux kernel for Amazon Web Services (AWS) systems
linux-kvm - Linux kernel for cloud environments
linux-lts-xenial - Linux hardware enablement kernel from Xenial for Trusty

Details

Jeremy Cline discovered a use-after-free in the nouveau graphics driver of
the Linux kernel during device removal. A privileged or physically
proximate attacker could use this to cause a denial of service (system
crash). (CVE-2020-27820)

It was discovered that a race condition existed in the network scheduling
subsystem of the Linux kernel, leading to 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-2021-39713)

It was discovered that the Parallel NFS (pNFS) implementation in the Linux
kernel did not properly perform bounds checking in some situations. An
attacker could use this to cause a denial of service (system crash) or
possibly execute arbitrary code. (CVE-2021-4157)

It was discovered that the ST21NFCA NFC...

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 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)

It was discovered that the EMS CAN/USB interface implementation in the
Linux kernel contained a double-free vulnerability when handling certain
error conditions. A local attacker could use this to cause a denial of
service (memory exhaustion). (CVE-2022-28390)

Update instructions

After a standard system update you need to reboot your computer to make all the necessary changes.

Learn more about how to get the fixes.

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.

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

Ubuntu Release	Package Version
16.04 xenial	linux-image-virtual – 4.4.0.224.231
	linux-image-generic – 4.4.0.224.231
	linux-image-aws – 4.4.0.1140.145
	linux-image-4.4.0-224-lowlatency – 4.4.0-224.257
	linux-image-4.4.0-1105-kvm – 4.4.0-1105.114
	linux-image-4.4.0-1140-aws – 4.4.0-1140.154
	linux-image-kvm – 4.4.0.1105.103
	linux-image-4.4.0-224-generic – 4.4.0-224.257
	linux-image-lowlatency – 4.4.0.224.231
14.04 trusty	linux-image-generic-lts-xenial – 4.4.0.224.195
	linux-image-4.4.0-224-generic – 4.4.0-224.257~14.04.1
	linux-image-lowlatency-lts-xenial – 4.4.0.224.195
	linux-image-4.4.0-224-lowlatency – 4.4.0-224.257~14.04.1
	linux-image-virtual-lts-xenial – 4.4.0.224.195

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References

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