1. Ubuntu Security Notices
  2. USN-6647-1

USN-6647-1: Linux kernel vulnerabilities

Publication date

21 February 2024

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

Details

It was discovered that a race condition existed in the ATM (Asynchronous
Transfer Mode) subsystem of the Linux kernel, 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-2023-51780)

It was discovered that a race condition existed in the Rose X.25 protocol
implementation in the Linux kernel, 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-2023-51782)

It was discovered that the netfilter connection tracker for netlink in the
Linux kernel did not properly perform reference counting in some error
conditions. A local attacker could possibly use this to cause a denial of
service (memory exhaustion). (

It was discovered that a race condition existed in the ATM (Asynchronous
Transfer Mode) subsystem of the Linux kernel, 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-2023-51780)

It was discovered that a race condition existed in the Rose X.25 protocol
implementation in the Linux kernel, 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-2023-51782)

It was discovered that the netfilter connection tracker for netlink in the
Linux kernel did not properly perform reference counting in some error
conditions. A local attacker could possibly use this to cause a denial of
service (memory exhaustion). (CVE-2023-7192)

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-4.15.0-1128-oracle –  4.15.0-1128.139  
linux-image-4.15.0-1149-kvm –  4.15.0-1149.154  
linux-image-4.15.0-1159-gcp –  4.15.0-1159.176  
linux-image-4.15.0-1165-aws –  4.15.0-1165.178  
linux-image-4.15.0-1174-azure –  4.15.0-1174.189  
linux-image-4.15.0-222-generic –  4.15.0-222.233  
linux-image-4.15.0-222-lowlatency –  4.15.0-222.233  
linux-image-aws-lts-18.04 –  4.15.0.1165.163  
linux-image-azure-lts-18.04 –  4.15.0.1174.142  
linux-image-gcp-lts-18.04 –  4.15.0.1159.173  
linux-image-generic –  4.15.0.222.206  
linux-image-kvm –  4.15.0.1149.140  
linux-image-lowlatency –  4.15.0.222.206  
linux-image-oracle-lts-18.04 –  4.15.0.1128.133  
linux-image-virtual –  4.15.0.222.206  
16.04 xenial linux-image-4.15.0-1128-oracle –  4.15.0-1128.139~16.04.1  
linux-image-4.15.0-1159-gcp –  4.15.0-1159.176~16.04.1  
linux-image-4.15.0-1165-aws –  4.15.0-1165.178~16.04.1  
linux-image-4.15.0-1174-azure –  4.15.0-1174.189~16.04.1  
linux-image-4.15.0-222-generic –  4.15.0-222.233~16.04.1  
linux-image-4.15.0-222-lowlatency –  4.15.0-222.233~16.04.1  
linux-image-aws-hwe –  4.15.0.1165.148  
linux-image-azure –  4.15.0.1174.158  
linux-image-gcp –  4.15.0.1159.149  
linux-image-generic-hwe-16.04 –  4.15.0.222.6  
linux-image-gke –  4.15.0.1159.149  
linux-image-lowlatency-hwe-16.04 –  4.15.0.222.6  
linux-image-oem –  4.15.0.222.6  
linux-image-oracle –  4.15.0.1128.109  
linux-image-virtual-hwe-16.04 –  4.15.0.222.6  

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References

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