Ubuntu Security Notices
USN-5240-1

USN-5240-1: Linux kernel vulnerability

Publication date

19 January 2022

Overview

The system could be made to crash or run programs as an administrator.

Releases

21.10 21.04 20.04 LTS 18.04 LTS

Packages

linux - Linux kernel
linux-aws - Linux kernel for Amazon Web Services (AWS) systems
linux-aws-5.11 - Linux kernel for Amazon Web Services (AWS) systems
linux-aws-5.4 - Linux kernel for Amazon Web Services (AWS) systems
linux-azure - Linux kernel for Microsoft Azure Cloud systems
linux-azure-5.11 - Linux kernel for Microsoft Azure cloud systems
linux-azure-5.4 - Linux kernel for Microsoft Azure cloud systems
linux-bluefield - Linux kernel for NVIDIA BlueField platforms
linux-gcp - Linux kernel for Google Cloud Platform (GCP) systems
linux-gcp-5.11 - Linux kernel for Google Cloud Platform (GCP) systems
linux-gcp-5.4 - Linux kernel for Google Cloud Platform (GCP) systems
linux-gke - Linux kernel for Google Container Engine (GKE) systems
linux-gke-5.4 - Linux kernel for Google Container Engine (GKE) systems
linux-gkeop - Linux kernel for Google Container Engine (GKE) systems
linux-gkeop-5.4 - Linux kernel for Google Container Engine (GKE) systems
linux-hwe-5.4 - Linux hardware enablement (HWE) kernel
linux-ibm - Linux kernel for IBM cloud systems
linux-kvm - Linux kernel for cloud environments
linux-oem-5.10 - Linux kernel for OEM systems
linux-oem-5.13 - Linux kernel for OEM systems
linux-oem-5.14 - Linux kernel for OEM systems
linux-oracle - Linux kernel for Oracle Cloud systems
linux-oracle-5.11 - Linux kernel for Oracle Cloud systems
linux-oracle-5.4 - Linux kernel for Oracle Cloud systems
linux-raspi - Linux kernel for Raspberry Pi systems
linux-raspi-5.4 - Linux kernel for Raspberry Pi systems

Details

William Liu and Jamie Hill-Daniel discovered that the file system context
functionality in the Linux kernel contained an integer underflow
vulnerability, leading to an out-of-bounds write. A local attacker could
use this to cause a denial of service (system crash) or execute arbitrary
code.

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
21.10 impish	linux-image-virtual – 5.13.0.27.37
	linux-image-5.13.0-27-generic-lpae – 5.13.0-27.29
	linux-image-5.13.0-1015-raspi-nolpae – 5.13.0-1015.17
	linux-image-generic-64k – 5.13.0.27.37
	linux-image-generic – 5.13.0.27.37
	linux-image-5.13.0-1012-azure – 5.13.0-1012.14
	linux-image-5.13.0-27-lowlatency – 5.13.0-27.29
	linux-image-aws – 5.13.0.1011.12
	linux-image-5.13.0-1012-gcp – 5.13.0-1012.15
	linux-image-azure – 5.13.0.1012.12
	linux-image-raspi-nolpae – 5.13.0.1015.20
	linux-image-oem-20.04 – 5.13.0.27.37
	linux-image-gke – 5.13.0.1012.11
	linux-image-5.13.0-27-generic – 5.13.0-27.29
	linux-image-5.13.0-1010-kvm – 5.13.0-1010.11
	linux-image-gcp – 5.13.0.1012.11
	linux-image-5.13.0-1015-raspi – 5.13.0-1015.17
	linux-image-oracle – 5.13.0.1015.15
	linux-image-5.13.0-1015-oracle – 5.13.0-1015.19
	linux-image-raspi – 5.13.0.1015.20
	linux-image-kvm – 5.13.0.1010.10
	linux-image-5.13.0-1011-aws – 5.13.0-1011.12
	linux-image-generic-lpae – 5.13.0.27.37
	linux-image-5.13.0-27-generic-64k – 5.13.0-27.29
	linux-image-lowlatency – 5.13.0.27.37
21.04 hirsute	linux-image-5.11.0-1027-azure – 5.11.0-1027.30
	linux-image-generic-64k – 5.11.0.49.48
	linux-image-generic – 5.11.0.49.48
	linux-image-5.11.0-1027-oracle – 5.11.0-1027.30
	linux-image-aws – 5.11.0.1027.26
	linux-image-5.11.0-49-generic-64k – 5.11.0-49.55
	linux-image-raspi – 5.11.0.1027.24
	linux-image-gke – 5.11.0.1028.26
	linux-image-5.11.0-49-lowlatency – 5.11.0-49.55
	linux-image-5.11.0-1024-kvm – 5.11.0-1024.27
	linux-image-5.11.0-1027-raspi – 5.11.0-1027.30
	linux-image-5.11.0-49-generic-lpae – 5.11.0-49.55
	linux-image-azure – 5.11.0.1027.26
	linux-image-raspi-nolpae – 5.11.0.1027.24
	linux-image-oem-20.04 – 5.11.0.49.48
	linux-image-virtual – 5.11.0.49.48
	linux-image-5.11.0-1027-raspi-nolpae – 5.11.0-1027.30
	linux-image-gcp – 5.11.0.1028.26
	linux-image-5.11.0-1027-aws – 5.11.0-1027.30
	linux-image-oracle – 5.11.0.1027.26
	linux-image-5.11.0-49-generic – 5.11.0-49.55
	linux-image-kvm – 5.11.0.1024.24
	linux-image-generic-lpae – 5.11.0.49.48
	linux-image-5.11.0-1028-gcp – 5.11.0-1028.32
	linux-image-lowlatency – 5.11.0.49.48
20.04 focal	linux-image-gkeop – 5.4.0.1031.34
	linux-image-virtual – 5.4.0.96.100
	linux-image-5.4.0-1053-kvm – 5.4.0-1053.55
	linux-image-5.11.0-1027-oracle – 5.11.0-1027.30~20.04.1
	linux-image-aws – 5.11.0.1027.30~20.04.25
	linux-image-5.14.0-1020-oem – 5.14.0-1020.22
	linux-image-ibm-lts-20.04 – 5.4.0.1012.13
	linux-image-gkeop-5.4 – 5.4.0.1031.34
	linux-image-azure – 5.11.0.1027.30~20.04.25
	linux-image-5.10.0-1057-oem – 5.10.0-1057.61
	linux-image-5.4.0-1050-raspi – 5.4.0-1050.56
	linux-image-5.4.0-96-generic-lpae – 5.4.0-96.109
	linux-image-5.4.0-1031-gkeop – 5.4.0-1031.32
	linux-image-oracle-lts-20.04 – 5.4.0.1061.61
	linux-image-kvm – 5.4.0.1053.52
	linux-image-5.11.0-1028-gcp – 5.11.0-1028.32~20.04.1
	linux-image-lowlatency – 5.4.0.96.100
	linux-image-5.4.0-1061-oracle – 5.4.0-1061.65
	linux-image-5.4.0-1062-gcp – 5.4.0-1062.66
	linux-image-oem-osp1 – 5.4.0.96.100
	linux-image-gke-5.4 – 5.4.0.1059.69
	linux-image-5.4.0-1059-gke – 5.4.0-1059.62
	linux-image-oem-20.04c – 5.13.0.1028.30
	linux-image-oem-20.04b – 5.10.0.1057.57
	linux-image-oem-20.04d – 5.14.0.1020.17
	linux-image-ibm – 5.4.0.1012.13
	linux-image-gcp – 5.11.0.1028.32~20.04.26
	linux-image-generic-lpae – 5.4.0.96.100
	linux-image-5.4.0-96-lowlatency – 5.4.0-96.109
	linux-image-oem – 5.4.0.96.100
	linux-image-5.11.0-1027-aws – 5.11.0-1027.30~20.04.1
	linux-image-bluefield – 5.4.0.1025.26
	linux-image-5.4.0-1025-bluefield – 5.4.0-1025.28
	linux-image-gke – 5.4.0.1059.69
	linux-image-aws-lts-20.04 – 5.4.0.1063.65
	linux-image-azure-lts-20.04 – 5.4.0.1067.65
	linux-image-5.4.0-1067-azure – 5.4.0-1067.70
	linux-image-oracle – 5.11.0.1027.30~20.04.19
	linux-image-raspi – 5.4.0.1050.84
	linux-image-generic – 5.4.0.96.100
	linux-image-5.4.0-96-generic – 5.4.0-96.109
	linux-image-5.11.0-1027-azure – 5.11.0-1027.30~20.04.1
	linux-image-5.4.0-1012-ibm – 5.4.0-1012.13
	linux-image-oem-20.04 – 5.10.0.1057.57
	linux-image-raspi2 – 5.4.0.1050.84
	linux-image-gcp-lts-20.04 – 5.4.0.1062.72
	linux-image-5.13.0-1028-oem – 5.13.0-1028.35
18.04 bionic	linux-image-generic-lpae-hwe-18.04 – 5.4.0.96.109~18.04.84
	linux-image-generic-hwe-18.04 – 5.4.0.96.109~18.04.84
	linux-image-snapdragon-hwe-18.04 – 5.4.0.96.109~18.04.84
	linux-image-5.4.0-96-lowlatency – 5.4.0-96.109~18.04.1
	linux-image-oem – 5.4.0.96.109~18.04.84
	linux-image-aws – 5.4.0.1063.45
	linux-image-lowlatency-hwe-18.04 – 5.4.0.96.109~18.04.84
	linux-image-5.4.0-96-generic – 5.4.0-96.109~18.04.1
	linux-image-raspi-hwe-18.04 – 5.4.0.1050.52
	linux-image-5.4.0-1061-oracle – 5.4.0-1061.65~18.04.1
	linux-image-oem-osp1 – 5.4.0.96.109~18.04.84
	linux-image-gkeop-5.4 – 5.4.0.1031.32~18.04.31
	linux-image-azure – 5.4.0.1067.46
	linux-image-virtual-hwe-18.04 – 5.4.0.96.109~18.04.84
	linux-image-5.4.0-1062-gcp – 5.4.0-1062.66~18.04.1
	linux-image-gcp – 5.4.0.1062.47
	linux-image-5.4.0-1050-raspi – 5.4.0-1050.56~18.04.1
	linux-image-5.4.0-1067-azure – 5.4.0-1067.70~18.04.1
	linux-image-5.4.0-96-generic-lpae – 5.4.0-96.109~18.04.1
	linux-image-oracle – 5.4.0.1061.65~18.04.40
	linux-image-5.4.0-1031-gkeop – 5.4.0-1031.32~18.04.1
	linux-image-5.4.0-1059-gke – 5.4.0-1059.62~18.04.1
	linux-image-gke-5.4 – 5.4.0.1059.62~18.04.23

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References

CVE-2022-0185

CVE-2022-0185

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