--- title: 'USN-6235-1: Linux kernel (OEM) 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-6235-1 --- 1. [Ubuntu Security Notices](https://ubuntu.com/security/notices) 2. USN-6235-1 --- # USN-6235-1: Linux kernel (OEM) vulnerabilities Publication date 18 July 2023 Overview Several security issues were fixed in the Linux kernel. Releases [22.04 LTS](https://ubuntu.com/security/notices?release=jammy) --- Open side navigation ## Packages * [linux-oem-6.0](https://ubuntu.com/security/cves?package=linux-oem-6.0) - Linux kernel for OEM systems ## Details It was discovered that the NTFS file system implementation in the Linux kernel contained a null pointer dereference in some situations. A local attacker could use this to cause a denial of service (system crash). ([CVE-2022-4842](https://ubuntu.com/security/CVE-2022-4842)) Jordy Zomer and Alexandra Sandulescu discovered that the Linux kernel did not properly implement speculative execution barriers in usercopy functions in certain situations. A local attacker could use this to expose sensitive information (kernel memory). ([CVE-2023-0459](https://ubuntu.com/security/CVE-2023-0459)) Seth Jenkins discovered that the Linux kernel did not properly perform address randomization for a per-cpu memory management structure. A local attacker could use this to expose sensitive information (kernel memory) or in conjunction with another kernel vulnerability. ([CVE-2023-0597](https://ubuntu.com/security/CVE-2023-0597)) It was discovered that the Human... --- 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 | | --- | --- | | 22.04 LTS jammy | [linux-image-6.0.0-1019-oem](https://launchpad.net/ubuntu/+source/linux-signed-oem-6.0) –  [6.0.0-1019.19](https://launchpad.net/ubuntu/+source/linux-signed-oem-6.0/6.0.0-1019.19) | | | | [linux-image-oem-22.04b](https://launchpad.net/ubuntu/+source/linux-meta-oem-6.0) –  [6.0.0.1019.19](https://launchpad.net/ubuntu/+source/linux-meta-oem-6.0/6.0.0.1019.19) | | | --- ### 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-2023-35788](https://ubuntu.com/security/CVE-2023-35788) * [CVE-2023-2430](https://ubuntu.com/security/CVE-2023-2430) * [CVE-2023-2176](https://ubuntu.com/security/CVE-2023-2176) * [CVE-2023-2124](https://ubuntu.com/security/CVE-2023-2124) * [CVE-2023-1073](https://ubuntu.com/security/CVE-2023-1073) * [CVE-2023-0597](https://ubuntu.com/security/CVE-2023-0597) * [CVE-2023-0459](https://ubuntu.com/security/CVE-2023-0459) * [CVE-2022-4842](https://ubuntu.com/security/CVE-2022-4842) ## Related notices id="usn" *Search* * [USN-6462-1](https://ubuntu.com/security/notices/USN-6462-1) * [USN-6462-2](https://ubuntu.com/security/notices/USN-6462-2) * [USN-6440-1](https://ubuntu.com/security/notices/USN-6440-1) * [USN-6440-2](https://ubuntu.com/security/notices/USN-6440-2) * [USN-6440-3](https://ubuntu.com/security/notices/USN-6440-3) * [USN-6347-1](https://ubuntu.com/security/notices/USN-6347-1) * [USN-6337-1](https://ubuntu.com/security/notices/USN-6337-1) * [USN-6332-1](https://ubuntu.com/security/notices/USN-6332-1) * [USN-6331-1](https://ubuntu.com/security/notices/USN-6331-1) * [USN-6314-1](https://ubuntu.com/security/notices/USN-6314-1) --- Show 48 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)