Ubuntu Security Notices
USN-6922-2

USN-6922-2: Linux kernel vulnerabilities

Publication date

1 August 2024

Overview

Several security issues were fixed in the Linux kernel.

Releases

22.04 LTS

Packages

linux-lowlatency-hwe-6.5 - Linux low latency kernel

Details

It was discovered that a race condition existed in the Bluetooth subsystem
in the Linux kernel when modifying certain settings values through debugfs.
A privileged local attacker could use this to cause a denial of service.
(CVE-2024-24857, CVE-2024-24858, CVE-2024-24859)

Chenyuan Yang discovered that the Unsorted Block Images (UBI) flash device
volume management subsystem did not properly validate logical eraseblock
sizes in certain situations. An attacker could possibly use this to cause a
denial of service (system crash). (CVE-2024-25739)

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-6.5.0-45-lowlatency – 6.5.0-45.45.1~22.04.1
	linux-image-6.5.0-45-lowlatency-64k – 6.5.0-45.45.1~22.04.1
	linux-image-lowlatency-64k-hwe-22.04 – 6.5.0.45.45.1~22.04.1
	linux-image-lowlatency-hwe-22.04 – 6.5.0.45.45.1~22.04.1

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References

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