==========================================================================
Ubuntu Security Notice USN-5442-2
June 01, 2022

linux-gcp-5.4, linux-gkeop, linux-gkeop-5.4, linux-ibm-5.4, linux-oracle,
linux-oracle-5.4, linux-raspi, linux-raspi-5.4 vulnerabilities
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS

Summary:

Several security issues were fixed in the Linux kernel.

Software Description:
- linux-gkeop: Linux kernel for Google Container Engine (GKE) systems
- linux-oracle: Linux kernel for Oracle Cloud systems
- linux-raspi: Linux kernel for Raspberry Pi systems
- linux-gcp-5.4: Linux kernel for Google Cloud Platform (GCP) systems
- linux-gkeop-5.4: Linux kernel for Google Container Engine (GKE) systems
- linux-ibm-5.4: Linux kernel for IBM cloud systems
- linux-oracle-5.4: Linux kernel for Oracle Cloud systems
- linux-raspi-5.4: Linux kernel for Raspberry Pi systems

Details:

Kyle Zeng discovered that the Network Queuing and Scheduling subsystem of
the Linux kernel did not properly perform reference counting in some
situations, leading to a use-after-free vulnerability. A local attacker
could use this to cause a denial of service (system crash) or execute
arbitrary code. (CVE-2022-29581)

Bing-Jhong Billy Jheng discovered that the io_uring subsystem in the Linux
kernel contained in integer overflow. A local attacker could use this to
cause a denial of service (system crash) or execute arbitrary code.
(CVE-2022-1116)

Jann Horn discovered that the Linux kernel did not properly enforce seccomp
restrictions in some situations. A local attacker could use this to bypass
intended seccomp sandbox restrictions. (CVE-2022-30594)

Update instructions:

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

Ubuntu 20.04 LTS:
  linux-image-5.4.0-1043-gkeop    5.4.0-1043.44
  linux-image-5.4.0-1062-raspi    5.4.0-1062.70
  linux-image-5.4.0-1073-oracle   5.4.0-1073.79
  linux-image-gkeop               5.4.0.1043.46
  linux-image-gkeop-5.4           5.4.0.1043.46
  linux-image-oracle-lts-20.04    5.4.0.1073.73
  linux-image-raspi               5.4.0.1062.96
  linux-image-raspi2              5.4.0.1062.96

Ubuntu 18.04 LTS:
  linux-image-5.4.0-1023-ibm      5.4.0-1023.25~18.04.1
  linux-image-5.4.0-1043-gkeop    5.4.0-1043.44~18.04.1
  linux-image-5.4.0-1062-raspi    5.4.0-1062.70~18.04.1
  linux-image-5.4.0-1073-oracle   5.4.0-1073.79~18.04.1
  linux-image-5.4.0-1075-gcp      5.4.0-1075.80~18.04.1
  linux-image-gcp                 5.4.0.1075.58
  linux-image-gkeop-5.4           5.4.0.1043.44~18.04.42
  linux-image-ibm                 5.4.0.1023.39
  linux-image-oracle              5.4.0.1073.79~18.04.52
  linux-image-raspi-hwe-18.04     5.4.0.1062.63

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-5442-2
  https://ubuntu.com/security/notices/USN-5442-1
  CVE-2022-1116, CVE-2022-29581, CVE-2022-30594

Package Information:
  https://launchpad.net/ubuntu/+source/linux-gkeop/5.4.0-1043.44
  https://launchpad.net/ubuntu/+source/linux-oracle/5.4.0-1073.79
  https://launchpad.net/ubuntu/+source/linux-raspi/5.4.0-1062.70
  https://launchpad.net/ubuntu/+source/linux-gcp-5.4/5.4.0-1075.80~18.04.1
  https://launchpad.net/ubuntu/+source/linux-gkeop-5.4/5.4.0-1043.44~18.04.1
  https://launchpad.net/ubuntu/+source/linux-ibm-5.4/5.4.0-1023.25~18.04.1
  https://launchpad.net/ubuntu/+source/linux-oracle-5.4/5.4.0-1073.79~18.04.1
  https://launchpad.net/ubuntu/+source/linux-raspi-5.4/5.4.0-1062.70~18.04.1