1. Ubuntu Security Notices
  2. USN-5566-1

USN-5566-1: Linux kernel vulnerabilities

Publication date

10 August 2022

Overview

Several security issues were fixed in the Linux kernel.

Releases

Packages

  • linux-aws - Linux kernel for Amazon Web Services (AWS) systems
  • linux-aws-5.15 - Linux kernel for Amazon Web Services (AWS) systems
  • linux-azure - Linux kernel for Microsoft Azure Cloud systems
  • linux-azure-5.15 - Linux kernel for Microsoft Azure cloud systems
  • linux-gcp - Linux kernel for Google Cloud Platform (GCP) systems
  • linux-gcp-5.15 - Linux kernel for Google Cloud Platform (GCP) systems
  • linux-gke - Linux kernel for Google Container Engine (GKE) systems
  • linux-gke-5.15 - 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

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. (

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

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
22.04 jammy linux-image-5.15.0-1016-kvm –  5.15.0-1016.19
linux-image-5.15.0-1012-ibm –  5.15.0-1012.14
linux-image-5.15.0-1016-gcp –  5.15.0-1016.21
linux-image-aws –  5.15.0.1017.17
linux-image-5.15.0-1013-raspi-nolpae –  5.15.0-1013.15
linux-image-gke-5.15 –  5.15.0.1014.17
linux-image-ibm –  5.15.0.1012.11
linux-image-azure –  5.15.0.1017.16
linux-image-raspi-nolpae –  5.15.0.1013.12
linux-image-5.15.0-1017-aws –  5.15.0-1017.21
linux-image-gke –  5.15.0.1014.17
linux-image-gcp –  5.15.0.1016.14
linux-image-5.15.0-1014-gke –  5.15.0-1014.17
linux-image-5.15.0-1016-oracle –  5.15.0-1016.20
linux-image-oracle –  5.15.0.1016.14
linux-image-5.15.0-1013-raspi –  5.15.0-1013.15
linux-image-5.15.0-1017-azure –  5.15.0-1017.20
linux-image-raspi –  5.15.0.1013.12
linux-image-kvm –  5.15.0.1016.14
20.04 focal linux-image-5.15.0-1017-azure –  5.15.0-1017.20~20.04.1
linux-image-azure –  5.15.0.1017.20~20.04.10
linux-image-5.15.0-1017-aws –  5.15.0-1017.21~20.04.1
linux-image-5.15.0-1016-gcp –  5.15.0-1016.21~20.04.1
linux-image-aws –  5.15.0.1017.21~20.04.9
linux-image-gcp –  5.15.0.1016.21~20.04.1
linux-image-gke-5.15 –  5.15.0.1014.17~20.04.1
linux-image-5.15.0-1014-gke –  5.15.0-1014.17~20.04.1

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References

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