--- title: 'USN-6534-2: Linux kernel 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-6534-2 --- 1. [Ubuntu Security Notices](https://ubuntu.com/security/notices) 2. USN-6534-2 --- # USN-6534-2: Linux kernel vulnerabilities Publication date 12 December 2023 Overview Several security issues were fixed in the Linux kernel. Releases [23.04](https://ubuntu.com/security/notices?release=lunar) --- Open side navigation ## Packages * [linux-gcp](https://ubuntu.com/security/cves?package=linux-gcp) - Linux kernel for Google Cloud Platform (GCP) systems * [linux-kvm](https://ubuntu.com/security/cves?package=linux-kvm) - Linux kernel for cloud environments ## Details 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)) Lin Ma discovered that the Netlink Transformation (XFRM) subsystem in the Linux kernel did not properly initialize a policy data structure, leading to an out-of-bounds vulnerability. A local privileged attacker could use this to cause a denial of service (system crash) or possibly expose sensitive information (kernel memory). ([CVE-2023-3773](https://ubuntu.com/security/CVE-2023-3773)) 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)... --- 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 | | --- | --- | | 23.04 lunar | [linux-image-6.2.0-1018-kvm](https://launchpad.net/ubuntu/+source/linux-signed-kvm) –  [6.2.0-1018.18](https://launchpad.net/ubuntu/+source/linux-signed-kvm/6.2.0-1018.18) | | | | [linux-image-6.2.0-1020-gcp](https://launchpad.net/ubuntu/+source/linux-signed-gcp) –  [6.2.0-1020.22](https://launchpad.net/ubuntu/+source/linux-signed-gcp/6.2.0-1020.22) | | | | [linux-image-gcp](https://launchpad.net/ubuntu/+source/linux-meta-gcp) –  [6.2.0.1020.20](https://launchpad.net/ubuntu/+source/linux-meta-gcp/6.2.0.1020.20) | | | | [linux-image-kvm](https://launchpad.net/ubuntu/+source/linux-meta-kvm) –  [6.2.0.1018.18](https://launchpad.net/ubuntu/+source/linux-meta-kvm/6.2.0.1018.18) | | | --- ### 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-2023-6039](https://ubuntu.com/security/CVE-2023-6039) * [CVE-2023-5717](https://ubuntu.com/security/CVE-2023-5717) * [CVE-2023-5178](https://ubuntu.com/security/CVE-2023-5178) * [CVE-2023-5158](https://ubuntu.com/security/CVE-2023-5158) * [CVE-2023-42754](https://ubuntu.com/security/CVE-2023-42754) * [CVE-2023-39198](https://ubuntu.com/security/CVE-2023-39198) * [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) --- Show 2 more references ## Related notices * [USN-6706-1](https://ubuntu.com/security/notices/USN-6706-1) * [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) * [USN-6626-3](https://ubuntu.com/security/notices/USN-6626-3) * [USN-6573-1](https://ubuntu.com/security/notices/USN-6573-1) * [USN-6549-1](https://ubuntu.com/security/notices/USN-6549-1) * [USN-6549-2](https://ubuntu.com/security/notices/USN-6549-2) --- Show 18 more references --- Have additional questions? 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