1. Ubuntu Security Notices
  2. USN-5980-1

USN-5980-1: Linux kernel vulnerabilities

Publication date

28 March 2023

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-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-gkeop - 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

It was discovered that the System V IPC implementation in the Linux kernel
did not properly handle large shared memory counts. A local attacker could
use this to cause a denial of service (memory exhaustion). (CVE-2021-3669)

It was discovered that the KVM VMX implementation in the Linux kernel did
not properly handle indirect branch prediction isolation between L1 and L2
VMs. An attacker in a guest VM could use this to expose sensitive
information from the host OS or other guest VMs. (CVE-2022-2196)

Gerald Lee discovered that the USB Gadget file system implementation in the
Linux kernel contained a race condition, leading to a use-after-free
vulnerability in some situations. A local attacker could use this to cause
a denial of service (system crash) or possibly execute arbitrary code.
(CVE-2022-4382)

It was...

It was discovered that the System V IPC implementation in the Linux kernel
did not properly handle large shared memory counts. A local attacker could
use this to cause a denial of service (memory exhaustion). (CVE-2021-3669)

It was discovered that the KVM VMX implementation in the Linux kernel did
not properly handle indirect branch prediction isolation between L1 and L2
VMs. An attacker in a guest VM could use this to expose sensitive
information from the host OS or other guest VMs. (CVE-2022-2196)

Gerald Lee discovered that the USB Gadget file system implementation in the
Linux kernel contained a race condition, leading to a use-after-free
vulnerability in some situations. A local attacker could use this to cause
a denial of service (system crash) or possibly execute arbitrary code.
(CVE-2022-4382)

It was discovered that the RNDIS USB driver in the Linux kernel contained
an integer overflow vulnerability. A local attacker with physical access
could plug in a malicious USB device to cause a denial of service (system
crash) or possibly execute arbitrary code. (CVE-2023-23559)

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
20.04 focal linux-image-gkeop –  5.4.0.1066.64
linux-image-5.4.0-1099-aws –  5.4.0-1099.107
linux-image-virtual –  5.4.0.146.144
linux-image-generic –  5.4.0.146.144
linux-image-oem –  5.4.0.146.144
linux-image-5.4.0-1066-gkeop –  5.4.0-1066.70
linux-image-5.4.0-1098-oracle –  5.4.0-1098.107
linux-image-5.4.0-1105-azure –  5.4.0-1105.111
linux-image-ibm –  5.4.0.1046.72
linux-image-raspi –  5.4.0.1082.112
linux-image-5.4.0-1088-kvm –  5.4.0-1088.94
linux-image-ibm-lts-20.04 –  5.4.0.1046.72
linux-image-azure-lts-20.04 –  5.4.0.1105.98
linux-image-5.4.0-1096-gke –  5.4.0-1096.103
linux-image-5.4.0-1102-gcp –  5.4.0-1102.111
linux-image-5.4.0-146-generic-lpae –  5.4.0-146.163
linux-image-gkeop-5.4 –  5.4.0.1066.64
linux-image-lowlatency –  5.4.0.146.144
linux-image-gcp-lts-20.04 –  5.4.0.1102.104
linux-image-aws-lts-20.04 –  5.4.0.1099.96
linux-image-raspi2 –  5.4.0.1082.112
linux-image-oem-osp1 –  5.4.0.146.144
linux-image-gke –  5.4.0.1096.101
linux-image-5.4.0-1082-raspi –  5.4.0-1082.93
linux-image-oracle-lts-20.04 –  5.4.0.1098.91
linux-image-5.4.0-146-generic –  5.4.0-146.163
linux-image-5.4.0-1046-ibm –  5.4.0-1046.51
linux-image-gke-5.4 –  5.4.0.1096.101
linux-image-5.4.0-146-lowlatency –  5.4.0-146.163
linux-image-kvm –  5.4.0.1088.82
linux-image-generic-lpae –  5.4.0.146.144

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References

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