--- title: 'USN-6548-5: Linux kernel (IoT) vulnerabilities | Ubuntu security notices' description: Ubuntu is an open source software operating system that runs from the desktop, to the cloud, to all your internet connected things. url: https://ubuntu.com/security/notices/USN-6548-5 --- 1. [Ubuntu Security Notices](https://ubuntu.com/security/notices) 2. USN-6548-5 --- # USN-6548-5: Linux kernel (IoT) vulnerabilities Publication date 10 January 2024 Overview Several security issues were fixed in the Linux kernel. Releases [20.04 LTS](https://ubuntu.com/security/notices?release=focal) --- Open side navigation ## Packages * [linux-iot](https://ubuntu.com/security/cves?package=linux-iot) - Linux kernel for IoT platforms ## Details It was discovered that Spectre-BHB mitigations were missing for Ampere processors. A local attacker could potentially use this to expose sensitive information. ([CVE-2023-3006](https://ubuntu.com/security/CVE-2023-3006)) It was discovered that the USB subsystem in the Linux kernel contained a race condition while handling device descriptors in certain situations, leading to a out-of-bounds read vulnerability. A local attacker could possibly use this to cause a denial of service (system crash). ([CVE-2023-37453](https://ubuntu.com/security/CVE-2023-37453)) Lucas Leong discovered that the netfilter subsystem in the Linux kernel did not properly validate some attributes passed from userspace. A local attacker could use this to cause a denial of service (system crash) or possibly expose sensitive information (kernel memory). ([CVE-2023-39189](https://ubuntu.com/security/CVE-2023-39189)) Sunjoo Park discovered that the netfilter subsystem in the... --- Show more ## 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.](https://ubuntu.com/security/cves/about#security) 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 LTS focal | [linux-image-5.4.0-1028-iot](https://launchpad.net/ubuntu/+source/linux-signed-iot) –  [5.4.0-1028.29](https://launchpad.net/ubuntu/+source/linux-signed-iot/5.4.0-1028.29) | | | --- ### 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](https://ubuntu.com/pro) ## References * [CVE-2023-6176](https://ubuntu.com/security/CVE-2023-6176) * [CVE-2023-5717](https://ubuntu.com/security/CVE-2023-5717) * [CVE-2023-5178](https://ubuntu.com/security/CVE-2023-5178) * [CVE-2023-42754](https://ubuntu.com/security/CVE-2023-42754) * [CVE-2023-39194](https://ubuntu.com/security/CVE-2023-39194) * [CVE-2023-39193](https://ubuntu.com/security/CVE-2023-39193) * [CVE-2023-39192](https://ubuntu.com/security/CVE-2023-39192) * [CVE-2023-39189](https://ubuntu.com/security/CVE-2023-39189) * [CVE-2023-37453](https://ubuntu.com/security/CVE-2023-37453) * [CVE-2023-3006](https://ubuntu.com/security/CVE-2023-3006) ## Related notices id="usn" *Search* * [USN-6701-1](https://ubuntu.com/security/notices/USN-6701-1) * [USN-6701-2](https://ubuntu.com/security/notices/USN-6701-2) * [USN-6701-3](https://ubuntu.com/security/notices/USN-6701-3) * [USN-6701-4](https://ubuntu.com/security/notices/USN-6701-4) * [USN-6652-1](https://ubuntu.com/security/notices/USN-6652-1) * [USN-6635-1](https://ubuntu.com/security/notices/USN-6635-1) * [USN-6628-1](https://ubuntu.com/security/notices/USN-6628-1) * [USN-6628-2](https://ubuntu.com/security/notices/USN-6628-2) * [USN-6626-1](https://ubuntu.com/security/notices/USN-6626-1) * [USN-6626-2](https://ubuntu.com/security/notices/USN-6626-2) --- Show 25 more references --- Have additional questions? [Talk to a member of the team ›](https://wiki.ubuntu.com/SecurityTeam/FAQ?_ga=2.242131138.1744859116.1742138161-1500419473.1726851136&_gl=1*161muja*_gcl_au*MzUyMTIzNjI1LjE3MzYyNDQ4NTE.#Contact)