1. Ubuntu Security Notices
  2. USN-6742-2

USN-6742-2: Linux kernel vulnerabilities

Publication date

23 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;
  • 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;
  • 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
22.04 jammy linux-image-5.15.0-105-lowlatency –  5.15.0-105.115
linux-image-5.15.0-105-lowlatency-64k –  5.15.0-105.115
linux-image-5.15.0-1053-nvidia –  5.15.0-1053.54
linux-image-5.15.0-1053-nvidia-lowlatency –  5.15.0-1053.54
linux-image-5.15.0-1061-azure –  5.15.0-1061.70
linux-image-azure-lts-22.04 –  5.15.0.1061.59
linux-image-lowlatency –  5.15.0.105.100
linux-image-lowlatency-64k –  5.15.0.105.100
linux-image-nvidia –  5.15.0.1053.53
linux-image-nvidia-lowlatency –  5.15.0.1053.53

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

Get Ubuntu Pro

References

Have additional questions?

Talk to a member of the team ›