A Linux kernel security update has been released for Ubuntu Linux 21.10.

USN-5295-2: Linux kernel vulnerabilities

=========================================================================
Ubuntu Security Notice USN-5295-2
February 22, 2022

linux, linux-aws, linux-gcp, linux-kvm, linux-oracle, linux-raspi
vulnerabilities
=========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 21.10

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-gcp: Linux kernel for Google Cloud Platform (GCP) systems
- linux-kvm: Linux kernel for cloud environments
- linux-oracle: Linux kernel for Oracle Cloud systems
- linux-raspi: Linux kernel for Raspberry Pi systems

Details:

It was discovered that the Packet network protocol implementation in the
Linux kernel contained a double-free vulnerability. A local attacker could
use this to cause a denial of service (system crash) or possibly execute
arbitrary code. (CVE-2021-22600)

Jann Horn discovered a race condition in the Unix domain socket
implementation in the Linux kernel that could result in a read-after-free.
A local attacker could use this to cause a denial of service (system crash)
or possibly execute arbitrary code. (CVE-2021-4083)

Kirill Tkhai discovered that the XFS file system implementation in the
Linux kernel did not calculate size correctly when pre-allocating space in
some situations. A local attacker could use this to expose sensitive
information. (CVE-2021-4155)

Sushma Venkatesh Reddy discovered that the Intel i915 graphics driver in
the Linux kernel did not perform a GPU TLB flush in some situations. A
local attacker could use this to cause a denial of service or possibly
execute arbitrary code. (CVE-2022-0330)

It was discovered that the VMware Virtual GPU driver in the Linux kernel
did not properly handle certain failure conditions, leading to a stale
entry in the file descriptor table. A local attacker could use this to
expose sensitive information or possibly gain administrative privileges.
(CVE-2022-22942)

Update instructions:

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

Ubuntu 21.10:
linux-image-5.13.0-1013-kvm 5.13.0-1013.14
linux-image-5.13.0-1015-gcp 5.13.0-1015.18
linux-image-5.13.0-1017-raspi 5.13.0-1017.19
linux-image-5.13.0-1017-raspi-nolpae 5.13.0-1017.19
linux-image-5.13.0-1018-oracle 5.13.0-1018.22
linux-image-5.13.0-30-generic 5.13.0-30.33
linux-image-5.13.0-30-generic-64k 5.13.0-30.33
linux-image-5.13.0-30-generic-lpae 5.13.0-30.33
linux-image-5.13.0-30-lowlatency 5.13.0-30.33
linux-image-aws 5.13.0.1014.15
linux-image-gcp 5.13.0.1015.14
linux-image-generic 5.13.0.30.40
linux-image-generic-64k 5.13.0.30.40
linux-image-generic-lpae 5.13.0.30.40
linux-image-gke 5.13.0.1015.14
linux-image-kvm 5.13.0.1013.13
linux-image-lowlatency 5.13.0.30.40
linux-image-oem-20.04 5.13.0.30.40
linux-image-oracle 5.13.0.1018.18
linux-image-raspi 5.13.0.1017.22
linux-image-raspi-nolpae 5.13.0.1017.22
linux-image-virtual 5.13.0.30.40

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-5295-2
  https://ubuntu.com/security/notices/USN-5295-1
CVE-2021-22600, CVE-2021-4083, CVE-2021-4155, CVE-2022-0330,
CVE-2022-22942

Package Information:
  https://launchpad.net/ubuntu/+source/linux/5.13.0-30.33
  https://launchpad.net/ubuntu/+source/linux-aws/5.13.0-1014.15
  https://launchpad.net/ubuntu/+source/linux-gcp/5.13.0-1015.18
  https://launchpad.net/ubuntu/+source/linux-kvm/5.13.0-1013.14
  https://launchpad.net/ubuntu/+source/linux-oracle/5.13.0-1018.22
  https://launchpad.net/ubuntu/+source/linux-raspi/5.13.0-1017.19