1. Ubuntu Security Notices
  2. USN-6741-1

USN-6741-1: Linux kernel vulnerabilities

Publication date

19 April 2024

Overview

Several security issues were fixed in the Linux kernel.

Releases

Packages

Details

Daniele Antonioli discovered that the Secure Simple Pairing and Secure
Connections pairing in the Bluetooth protocol could allow an
unauthenticated user to complete authentication without pairing
credentials. A physically proximate attacker placed between two Bluetooth
devices could use this to subsequently impersonate one of the paired
devices. (CVE-2023-24023)

Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:

  • JFS file system;
  • BPF subsystem;
  • Netfilter

Daniele Antonioli discovered that the Secure Simple Pairing and Secure
Connections pairing in the Bluetooth protocol could allow an
unauthenticated user to complete authentication without pairing
credentials. A physically proximate attacker placed between two Bluetooth
devices could use this to subsequently impersonate one of the paired
devices. (CVE-2023-24023)

Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:

  • JFS file system;
  • BPF subsystem;
  • Netfilter

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-5.4.0-1035-iot –  5.4.0-1035.36
linux-image-5.4.0-1042-xilinx-zynqmp –  5.4.0-1042.46
linux-image-5.4.0-1070-ibm –  5.4.0-1070.75
linux-image-5.4.0-1083-bluefield –  5.4.0-1083.90
linux-image-5.4.0-1090-gkeop –  5.4.0-1090.94
linux-image-5.4.0-1107-raspi –  5.4.0-1107.119
linux-image-5.4.0-1111-kvm –  5.4.0-1111.118
linux-image-5.4.0-1122-oracle –  5.4.0-1122.131
linux-image-5.4.0-1123-aws –  5.4.0-1123.133
linux-image-5.4.0-1127-gcp –  5.4.0-1127.136
linux-image-5.4.0-1128-azure –  5.4.0-1128.135
linux-image-5.4.0-177-generic –  5.4.0-177.197
linux-image-5.4.0-177-generic-lpae –  5.4.0-177.197
linux-image-5.4.0-177-lowlatency –  5.4.0-177.197
linux-image-aws-lts-20.04 –  5.4.0.1123.120
linux-image-azure-lts-20.04 –  5.4.0.1128.122
linux-image-bluefield –  5.4.0.1083.79
linux-image-gcp-lts-20.04 –  5.4.0.1127.129
linux-image-generic –  5.4.0.177.175
linux-image-generic-lpae –  5.4.0.177.175
linux-image-gkeop –  5.4.0.1090.88
linux-image-gkeop-5.4 –  5.4.0.1090.88
linux-image-ibm-lts-20.04 –  5.4.0.1070.99
linux-image-kvm –  5.4.0.1111.107
linux-image-lowlatency –  5.4.0.177.175
linux-image-oem –  5.4.0.177.175
linux-image-oem-osp1 –  5.4.0.177.175
linux-image-oracle-lts-20.04 –  5.4.0.1122.115
linux-image-raspi –  5.4.0.1107.137
linux-image-raspi2 –  5.4.0.1107.137
linux-image-virtual –  5.4.0.177.175
linux-image-xilinx-zynqmp –  5.4.0.1042.42
18.04 bionic linux-image-5.4.0-1070-ibm –  5.4.0-1070.75~18.04.1  
linux-image-5.4.0-1107-raspi –  5.4.0-1107.119~18.04.1  
linux-image-5.4.0-1122-oracle –  5.4.0-1122.131~18.04.1  
linux-image-5.4.0-1123-aws –  5.4.0-1123.133~18.04.1  
linux-image-5.4.0-1127-gcp –  5.4.0-1127.136~18.04.1  
linux-image-5.4.0-1128-azure –  5.4.0-1128.135~18.04.1  
linux-image-5.4.0-177-generic –  5.4.0-177.197~18.04.1  
linux-image-5.4.0-177-lowlatency –  5.4.0-177.197~18.04.1  
linux-image-aws –  5.4.0.1123.133~18.04.1  
linux-image-azure –  5.4.0.1128.135~18.04.1  
linux-image-gcp –  5.4.0.1127.136~18.04.1  
linux-image-generic-hwe-18.04 –  5.4.0.177.197~18.04.1  
linux-image-ibm –  5.4.0.1070.75~18.04.1  
linux-image-lowlatency-hwe-18.04 –  5.4.0.177.197~18.04.1  
linux-image-oem –  5.4.0.177.197~18.04.1  
linux-image-oem-osp1 –  5.4.0.177.197~18.04.1  
linux-image-oracle –  5.4.0.1122.131~18.04.1  
linux-image-raspi-hwe-18.04 –  5.4.0.1107.119~18.04.1  
linux-image-snapdragon-hwe-18.04 –  5.4.0.177.197~18.04.1  
linux-image-virtual-hwe-18.04 –  5.4.0.177.197~18.04.1  

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References

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