1. Ubuntu Security Notices
  2. USN-5466-1

USN-5466-1: Linux kernel vulnerabilities

Publication date

8 June 2022

Overview

Several security issues were fixed in the Linux kernel.

Releases

Packages

  • linux - Linux kernel
  • linux-aws - Linux kernel for Amazon Web Services (AWS) systems
  • linux-aws-hwe - Linux kernel for Amazon Web Services (AWS-HWE) systems
  • linux-azure - Linux kernel for Microsoft Azure Cloud systems
  • linux-azure-4.15 - Linux kernel for Microsoft Azure Cloud systems
  • linux-gcp - Linux kernel for Google Cloud Platform (GCP) systems
  • linux-gcp-4.15 - Linux kernel for Google Cloud Platform (GCP) systems
  • linux-hwe - Linux hardware enablement (HWE) kernel
  • linux-kvm - Linux kernel for cloud environments
  • linux-oracle - Linux kernel for Oracle Cloud systems
  • linux-raspi2 - Linux kernel for Raspberry Pi systems
  • linux-snapdragon - Linux kernel for Qualcomm Snapdragon processors

Details

It was discovered that the Linux kernel did not properly restrict access to
the kernel debugger when booted in secure boot environments. A privileged
attacker could use this to bypass UEFI Secure Boot restrictions.
(CVE-2022-21499)

Aaron Adams discovered that the netfilter subsystem in the Linux kernel did
not properly handle the removal of stateful expressions 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-2022-1966)

It was discovered that the SCTP protocol implementation in the Linux kernel
did not properly verify VTAGs in some situations. A remote attacker could
possibly use this to cause a denial of service (connection disassociation).
(CVE-2021-3772)

It was discovered that the...

It was discovered that the Linux kernel did not properly restrict access to
the kernel debugger when booted in secure boot environments. A privileged
attacker could use this to bypass UEFI Secure Boot restrictions.
(CVE-2022-21499)

Aaron Adams discovered that the netfilter subsystem in the Linux kernel did
not properly handle the removal of stateful expressions 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-2022-1966)

It was discovered that the SCTP protocol implementation in the Linux kernel
did not properly verify VTAGs in some situations. A remote attacker could
possibly use this to cause a denial of service (connection disassociation).
(CVE-2021-3772)

It was discovered that the btrfs file system implementation in the Linux
kernel did not properly handle locking in certain error conditions. A local
attacker could use this to cause a denial of service (kernel deadlock).
(CVE-2021-4149)

David Bouman discovered that the netfilter subsystem in the Linux kernel
did not initialize memory in some situations. A local attacker could use
this to expose sensitive information (kernel memory). (CVE-2022-1016)

It was discovered that the virtual graphics memory manager implementation
in the Linux kernel was subject to a race condition, potentially leading to
an information leak. (CVE-2022-1419)

赵子轩 discovered that the 802.2 LLC type 2 driver in the Linux kernel did not
properly perform reference counting in some error conditions. A local
attacker could use this to cause a denial of service. (CVE-2022-28356)

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
18.04 bionic linux-image-4.15.0-1133-aws –  4.15.0-1133.143
linux-image-4.15.0-1119-kvm –  4.15.0-1119.123
linux-image-virtual –  4.15.0.184.172
linux-image-4.15.0-184-generic-lpae –  4.15.0-184.194
linux-image-aws-lts-18.04 –  4.15.0.1133.135
linux-image-generic –  4.15.0.184.172
linux-image-oracle-lts-18.04 –  4.15.0.1098.107
linux-image-snapdragon –  4.15.0.1132.133
linux-image-4.15.0-1142-azure –  4.15.0-1142.156
linux-image-4.15.0-1127-gcp –  4.15.0-1127.142
linux-image-raspi2 –  4.15.0.1114.111
linux-image-azure-lts-18.04 –  4.15.0.1142.114
linux-image-generic-lpae –  4.15.0.184.172
linux-image-gcp-lts-18.04 –  4.15.0.1127.145
linux-image-4.15.0-1132-snapdragon –  4.15.0-1132.142
linux-image-4.15.0-1098-oracle –  4.15.0-1098.108
linux-image-4.15.0-1114-raspi2 –  4.15.0-1114.122
linux-image-kvm –  4.15.0.1119.114
linux-image-4.15.0-184-generic –  4.15.0-184.194
linux-image-4.15.0-184-lowlatency –  4.15.0-184.194
linux-image-lowlatency –  4.15.0.184.172
16.04 xenial linux-image-oem –  4.15.0.184.173  
linux-image-lowlatency-hwe-16.04 –  4.15.0.184.173  
linux-image-aws-hwe –  4.15.0.1133.122  
linux-image-azure –  4.15.0.1142.131  
linux-image-4.15.0-1142-azure –  4.15.0-1142.156~16.04.1  
linux-image-gke –  4.15.0.1127.126  
linux-image-4.15.0-1127-gcp –  4.15.0-1127.142~16.04.1  
linux-image-gcp –  4.15.0.1127.126  
linux-image-4.15.0-1133-aws-hwe –  4.15.0-1133.143~16.04.1  
linux-image-generic-hwe-16.04 –  4.15.0.184.173  
linux-image-oracle –  4.15.0.1098.85  
linux-image-4.15.0-1098-oracle –  4.15.0-1098.108~16.04.1  
linux-image-virtual-hwe-16.04 –  4.15.0.184.173  
linux-image-4.15.0-184-generic –  4.15.0-184.194~16.04.1  
linux-image-4.15.0-184-lowlatency –  4.15.0-184.194~16.04.1  
14.04 trusty linux-image-azure –  4.15.0.1142.113  
linux-image-4.15.0-1142-azure –  4.15.0-1142.156~14.04.1  

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References

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