A Linux kernel security update has been released for Ubuntu Linux 20.04 LTS and 22.04 LTS.

USN-5566-1: Linux kernel vulnerabilities

==========================================================================
Ubuntu Security Notice USN-5566-1
August 10, 2022

linux-aws, linux-aws-5.15, linux-azure, linux-azure-5.15, linux-gcp,
linux-gcp-5.15, linux-gke, linux-gke-5.15, linux-ibm, linux-kvm,
linux-oracle, linux-raspi vulnerabilities
==========================================================================

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

- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS

Summary:

Several security issues were fixed in the Linux kernel.

Software Description:
- linux-aws: Linux kernel for Amazon Web Services (AWS) systems
- linux-azure: Linux kernel for Microsoft Azure Cloud systems
- linux-gcp: Linux kernel for Google Cloud Platform (GCP) systems
- linux-gke: Linux kernel for Google Container Engine (GKE) systems
- linux-ibm: Linux kernel for IBM cloud systems
- linux-kvm: Linux kernel for cloud environments
- linux-oracle: Linux kernel for Oracle Cloud systems
- linux-raspi: Linux kernel for Raspberry Pi systems
- linux-aws-5.15: Linux kernel for Amazon Web Services (AWS) systems
- linux-azure-5.15: Linux kernel for Microsoft Azure cloud systems
- linux-gcp-5.15: Linux kernel for Google Cloud Platform (GCP) systems
- linux-gke-5.15: Linux kernel for Google Container Engine (GKE) systems

Details:

Zhenpeng Lin discovered that the network packet scheduler implementation in
the Linux kernel did not properly remove all references to a route filter
before freeing it in some situations. A local attacker could use this to
cause a denial of service (system crash) or execute arbitrary code.
(CVE-2022-2588)

It was discovered that the netfilter subsystem of the Linux kernel did not
prevent one nft object from referencing an nft set in another nft table,
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-2022-2586)

It was discovered that the implementation of POSIX timers in the Linux
kernel did not properly clean up timers in some situations. A local
attacker could use this to cause a denial of service (system crash) or
execute arbitrary code. (CVE-2022-2585)

Minh Yuan discovered that the floppy disk driver in the Linux kernel
contained a race condition, leading to a use-after-free vulnerability. A
local attacker could possibly use this to cause a denial of service (system
crash) or execute arbitrary code. (CVE-2022-1652)

It was discovered that the Atheros ath9k wireless device driver in the
Linux kernel did not properly handle some error conditions, 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-2022-1679)

Felix Fu discovered that the Sun RPC implementation in the Linux kernel did
not properly handle socket states, leading to a use-after-free
vulnerability. A remote attacker could possibly use this to cause a denial
of service (system crash) or execute arbitrary code. (CVE-2022-28893)

Johannes Wikner and Kaveh Razavi discovered that for some AMD x86-64
processors, the branch predictor could by mis-trained for return
instructions in certain circumstances. A local attacker could possibly use
this to expose sensitive information. (CVE-2022-29900)

Johannes Wikner and Kaveh Razavi discovered that for some Intel x86-64
processors, the Linux kernel's protections against speculative branch
target injection attacks were insufficient in some circumstances. A local
attacker could possibly use this to expose sensitive information.
(CVE-2022-29901)

Arthur Mongodin discovered that the netfilter subsystem in the Linux kernel
did not properly perform data validation. A local attacker could use this
to escalate privileges in certain situations. (CVE-2022-34918)

Update instructions:

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

Ubuntu 22.04 LTS:
linux-image-5.15.0-1012-ibm 5.15.0-1012.14
linux-image-5.15.0-1013-raspi 5.15.0-1013.15
linux-image-5.15.0-1013-raspi-nolpae 5.15.0-1013.15
linux-image-5.15.0-1014-gke 5.15.0-1014.17
linux-image-5.15.0-1016-gcp 5.15.0-1016.21
linux-image-5.15.0-1016-kvm 5.15.0-1016.19
linux-image-5.15.0-1016-oracle 5.15.0-1016.20
linux-image-5.15.0-1017-aws 5.15.0-1017.21
linux-image-5.15.0-1017-azure 5.15.0-1017.20
linux-image-aws 5.15.0.1017.17
linux-image-azure 5.15.0.1017.16
linux-image-gcp 5.15.0.1016.14
linux-image-gke 5.15.0.1014.17
linux-image-gke-5.15 5.15.0.1014.17
linux-image-ibm 5.15.0.1012.11
linux-image-kvm 5.15.0.1016.14
linux-image-oracle 5.15.0.1016.14
linux-image-raspi 5.15.0.1013.12
linux-image-raspi-nolpae 5.15.0.1013.12

Ubuntu 20.04 LTS:
linux-image-5.15.0-1014-gke 5.15.0-1014.17~20.04.1
linux-image-5.15.0-1016-gcp 5.15.0-1016.21~20.04.1
linux-image-5.15.0-1017-aws 5.15.0-1017.21~20.04.1
linux-image-5.15.0-1017-azure 5.15.0-1017.20~20.04.1
linux-image-aws 5.15.0.1017.21~20.04.9
linux-image-azure 5.15.0.1017.20~20.04.10
linux-image-gcp 5.15.0.1016.21~20.04.1
linux-image-gke-5.15 5.15.0.1014.17~20.04.1

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-5566-1
CVE-2022-1652, CVE-2022-1679, CVE-2022-2585, CVE-2022-2586,
CVE-2022-2588, CVE-2022-28893, CVE-2022-29900, CVE-2022-29901,
CVE-2022-34918

Package Information:
https://launchpad.net/ubuntu/+source/linux-aws/5.15.0-1017.21
https://launchpad.net/ubuntu/+source/linux-azure/5.15.0-1017.20
https://launchpad.net/ubuntu/+source/linux-gcp/5.15.0-1016.21
https://launchpad.net/ubuntu/+source/linux-gke/5.15.0-1014.17
https://launchpad.net/ubuntu/+source/linux-ibm/5.15.0-1012.14
https://launchpad.net/ubuntu/+source/linux-kvm/5.15.0-1016.19
https://launchpad.net/ubuntu/+source/linux-oracle/5.15.0-1016.20
https://launchpad.net/ubuntu/+source/linux-raspi/5.15.0-1013.15

https://launchpad.net/ubuntu/+source/linux-aws-5.15/5.15.0-1017.21~20.04.1

https://launchpad.net/ubuntu/+source/linux-azure-5.15/5.15.0-1017.20~20.04.1

https://launchpad.net/ubuntu/+source/linux-gcp-5.15/5.15.0-1016.21~20.04.1

https://launchpad.net/ubuntu/+source/linux-gke-5.15/5.15.0-1014.17~20.04.1