--- title: 'USN-6444-1: 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-6444-1 --- 1. [Ubuntu Security Notices](https://ubuntu.com/security/notices) 2. USN-6444-1 --- # USN-6444-1: Linux kernel vulnerabilities Publication date 19 October 2023 Overview Several security issues were fixed in the Linux kernel. Releases [23.04](https://ubuntu.com/security/notices?release=lunar) [22.04 LTS](https://ubuntu.com/security/notices?release=jammy) --- Open side navigation ## Packages * [linux](https://ubuntu.com/security/cves?package=linux) - Linux kernel * [linux-aws](https://ubuntu.com/security/cves?package=linux-aws) - Linux kernel for Amazon Web Services (AWS) systems * [linux-aws-6.2](https://ubuntu.com/security/cves?package=linux-aws-6.2) - Linux kernel for Amazon Web Services (AWS) systems * [linux-azure](https://ubuntu.com/security/cves?package=linux-azure) - Linux kernel for Microsoft Azure Cloud systems * [linux-azure-6.2](https://ubuntu.com/security/cves?package=linux-azure-6.2) - Linux kernel for Microsoft Azure cloud systems * [linux-azure-fde-6.2](https://ubuntu.com/security/cves?package=linux-azure-fde-6.2) - Linux kernel for Microsoft Azure CVM cloud systems * [linux-gcp](https://ubuntu.com/security/cves?package=linux-gcp) - Linux kernel for Google Cloud Platform (GCP) systems * [linux-gcp-6.2](https://ubuntu.com/security/cves?package=linux-gcp-6.2) - Linux kernel for Google Cloud Platform (GCP) systems * [linux-hwe-6.2](https://ubuntu.com/security/cves?package=linux-hwe-6.2) - Linux hardware enablement (HWE) kernel * [linux-kvm](https://ubuntu.com/security/cves?package=linux-kvm) - Linux kernel for cloud environments * [linux-lowlatency](https://ubuntu.com/security/cves?package=linux-lowlatency) - Linux low latency kernel * [linux-lowlatency-hwe-6.2](https://ubuntu.com/security/cves?package=linux-lowlatency-hwe-6.2) - Linux low latency kernel * [linux-oracle](https://ubuntu.com/security/cves?package=linux-oracle) - Linux kernel for Oracle Cloud systems * [linux-raspi](https://ubuntu.com/security/cves?package=linux-raspi) - Linux kernel for Raspberry Pi systems * [linux-starfive](https://ubuntu.com/security/cves?package=linux-starfive) - Linux kernel for StarFive processors ## Details Ross Lagerwall discovered that the Xen netback backend driver in the Linux kernel did not properly handle certain unusual packets from a paravirtualized network frontend, leading to a buffer overflow. An attacker in a guest VM could use this to cause a denial of service (host system crash) or possibly execute arbitrary code. ([CVE-2023-34319](https://ubuntu.com/security/CVE-2023-34319)) Bien Pham discovered that the netfiler subsystem in the Linux kernel contained a race condition, leading to a use-after-free vulnerability. A local user could use this to cause a denial of service (system crash) or possibly execute arbitrary code. ([CVE-2023-4244](https://ubuntu.com/security/CVE-2023-4244)) Kyle Zeng discovered that the networking stack implementation in the Linux kernel did not properly validate skb object size in certain conditions. An attacker could use this cause a denial of service (system crash) or possibly execute arbitrary code. ( --- 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-6.2.0-1007-starfive](https://launchpad.net/ubuntu/+source/linux-starfive) –  [6.2.0-1007.8](https://launchpad.net/ubuntu/+source/linux-starfive/6.2.0-1007.8) | | | | [linux-image-6.2.0-1014-aws](https://launchpad.net/ubuntu/+source/linux-signed-aws) –  [6.2.0-1014.14](https://launchpad.net/ubuntu/+source/linux-signed-aws/6.2.0-1014.14) | | | | [linux-image-6.2.0-1014-oracle](https://launchpad.net/ubuntu/+source/linux-signed-oracle) –  [6.2.0-1014.14](https://launchpad.net/ubuntu/+source/linux-signed-oracle/6.2.0-1014.14) | | | | [linux-image-6.2.0-1015-azure](https://launchpad.net/ubuntu/+source/linux-signed-azure) –  [6.2.0-1015.15](https://launchpad.net/ubuntu/+source/linux-signed-azure/6.2.0-1015.15) | | | | [linux-image-6.2.0-1015-kvm](https://launchpad.net/ubuntu/+source/linux-signed-kvm) –  [6.2.0-1015.15](https://launchpad.net/ubuntu/+source/linux-signed-kvm/6.2.0-1015.15) | | | | [linux-image-6.2.0-1015-lowlatency](https://launchpad.net/ubuntu/+source/linux-signed-lowlatency) –  [6.2.0-1015.15](https://launchpad.net/ubuntu/+source/linux-signed-lowlatency/6.2.0-1015.15) | | | | [linux-image-6.2.0-1015-lowlatency-64k](https://launchpad.net/ubuntu/+source/linux-signed-lowlatency) –  [6.2.0-1015.15](https://launchpad.net/ubuntu/+source/linux-signed-lowlatency/6.2.0-1015.15) | | | | [linux-image-6.2.0-1015-raspi](https://launchpad.net/ubuntu/+source/linux-raspi) –  [6.2.0-1015.17](https://launchpad.net/ubuntu/+source/linux-raspi/6.2.0-1015.17) | | | | [linux-image-6.2.0-1017-gcp](https://launchpad.net/ubuntu/+source/linux-signed-gcp) –  [6.2.0-1017.19](https://launchpad.net/ubuntu/+source/linux-signed-gcp/6.2.0-1017.19) | | | | [linux-image-6.2.0-35-generic](https://launchpad.net/ubuntu/+source/linux-signed) –  [6.2.0-35.35](https://launchpad.net/ubuntu/+source/linux-signed/6.2.0-35.35) | | | | [linux-image-6.2.0-35-generic-64k](https://launchpad.net/ubuntu/+source/linux-signed) –  [6.2.0-35.35](https://launchpad.net/ubuntu/+source/linux-signed/6.2.0-35.35) | | | | [linux-image-6.2.0-35-generic-lpae](https://launchpad.net/ubuntu/+source/linux) –  [6.2.0-35.35](https://launchpad.net/ubuntu/+source/linux/6.2.0-35.35) | | | | [linux-image-aws](https://launchpad.net/ubuntu/+source/linux-meta-aws) –  [6.2.0.1014.15](https://launchpad.net/ubuntu/+source/linux-meta-aws/6.2.0.1014.15) | | | | [linux-image-azure](https://launchpad.net/ubuntu/+source/linux-meta-azure) –  [6.2.0.1015.15](https://launchpad.net/ubuntu/+source/linux-meta-azure/6.2.0.1015.15) | | | | [linux-image-gcp](https://launchpad.net/ubuntu/+source/linux-meta-gcp) –  [6.2.0.1017.17](https://launchpad.net/ubuntu/+source/linux-meta-gcp/6.2.0.1017.17) | | | | [linux-image-generic](https://launchpad.net/ubuntu/+source/linux-meta) –  [6.2.0.35.35](https://launchpad.net/ubuntu/+source/linux-meta/6.2.0.35.35) | | | | [linux-image-generic-64k](https://launchpad.net/ubuntu/+source/linux-meta) –  [6.2.0.35.35](https://launchpad.net/ubuntu/+source/linux-meta/6.2.0.35.35) | | | | [linux-image-generic-lpae](https://launchpad.net/ubuntu/+source/linux-meta) –  [6.2.0.35.35](https://launchpad.net/ubuntu/+source/linux-meta/6.2.0.35.35) | | | | [linux-image-kvm](https://launchpad.net/ubuntu/+source/linux-meta-kvm) –  [6.2.0.1015.15](https://launchpad.net/ubuntu/+source/linux-meta-kvm/6.2.0.1015.15) | | | | [linux-image-lowlatency](https://launchpad.net/ubuntu/+source/linux-meta-lowlatency) –  [6.2.0.1015.15](https://launchpad.net/ubuntu/+source/linux-meta-lowlatency/6.2.0.1015.15) | | | | [linux-image-lowlatency-64k](https://launchpad.net/ubuntu/+source/linux-meta-lowlatency) –  [6.2.0.1015.15](https://launchpad.net/ubuntu/+source/linux-meta-lowlatency/6.2.0.1015.15) | | | | [linux-image-oracle](https://launchpad.net/ubuntu/+source/linux-meta-oracle) –  [6.2.0.1014.14](https://launchpad.net/ubuntu/+source/linux-meta-oracle/6.2.0.1014.14) | | | | [linux-image-raspi](https://launchpad.net/ubuntu/+source/linux-meta-raspi) –  [6.2.0.1015.18](https://launchpad.net/ubuntu/+source/linux-meta-raspi/6.2.0.1015.18) | | | | [linux-image-raspi-nolpae](https://launchpad.net/ubuntu/+source/linux-meta-raspi) –  [6.2.0.1015.18](https://launchpad.net/ubuntu/+source/linux-meta-raspi/6.2.0.1015.18) | | | | [linux-image-starfive](https://launchpad.net/ubuntu/+source/linux-meta-starfive) –  [6.2.0.1007.10](https://launchpad.net/ubuntu/+source/linux-meta-starfive/6.2.0.1007.10) | | | | [linux-image-virtual](https://launchpad.net/ubuntu/+source/linux-meta) –  [6.2.0.35.35](https://launchpad.net/ubuntu/+source/linux-meta/6.2.0.35.35) | | | | 22.04 LTS jammy | [linux-image-6.2.0-1014-aws](https://launchpad.net/ubuntu/+source/linux-signed-aws-6.2) –  [6.2.0-1014.14~22.04.1](https://launchpad.net/ubuntu/+source/linux-signed-aws-6.2/6.2.0-1014.14~22.04.1) | | | | [linux-image-6.2.0-1015-azure](https://launchpad.net/ubuntu/+source/linux-signed-azure-6.2) –  [6.2.0-1015.15~22.04.1](https://launchpad.net/ubuntu/+source/linux-signed-azure-6.2/6.2.0-1015.15~22.04.1) | | | | [linux-image-6.2.0-1015-azure-fde](https://launchpad.net/ubuntu/+source/linux-signed-azure-fde-6.2) –  [6.2.0-1015.15~22.04.1.1](https://launchpad.net/ubuntu/+source/linux-signed-azure-fde-6.2/6.2.0-1015.15~22.04.1.1) | | | | [linux-image-6.2.0-1015-lowlatency](https://launchpad.net/ubuntu/+source/linux-signed-lowlatency-hwe-6.2) –  [6.2.0-1015.15~22.04.1](https://launchpad.net/ubuntu/+source/linux-signed-lowlatency-hwe-6.2/6.2.0-1015.15~22.04.1) | | | | [linux-image-6.2.0-1015-lowlatency-64k](https://launchpad.net/ubuntu/+source/linux-signed-lowlatency-hwe-6.2) –  [6.2.0-1015.15~22.04.1](https://launchpad.net/ubuntu/+source/linux-signed-lowlatency-hwe-6.2/6.2.0-1015.15~22.04.1) | | | | [linux-image-6.2.0-1017-gcp](https://launchpad.net/ubuntu/+source/linux-signed-gcp-6.2) –  [6.2.0-1017.19~22.04.1](https://launchpad.net/ubuntu/+source/linux-signed-gcp-6.2/6.2.0-1017.19~22.04.1) | | | | [linux-image-6.2.0-35-generic](https://launchpad.net/ubuntu/+source/linux-signed-hwe-6.2) –  [6.2.0-35.35~22.04.1](https://launchpad.net/ubuntu/+source/linux-signed-hwe-6.2/6.2.0-35.35~22.04.1) | | | | [linux-image-6.2.0-35-generic-64k](https://launchpad.net/ubuntu/+source/linux-signed-hwe-6.2) –  [6.2.0-35.35~22.04.1](https://launchpad.net/ubuntu/+source/linux-signed-hwe-6.2/6.2.0-35.35~22.04.1) | | | | [linux-image-6.2.0-35-generic-lpae](https://launchpad.net/ubuntu/+source/linux-hwe-6.2) –  [6.2.0-35.35~22.04.1](https://launchpad.net/ubuntu/+source/linux-hwe-6.2/6.2.0-35.35~22.04.1) | | | | [linux-image-aws](https://launchpad.net/ubuntu/+source/linux-meta-aws-6.2) –  [6.2.0.1014.14~22.04.1](https://launchpad.net/ubuntu/+source/linux-meta-aws-6.2/6.2.0.1014.14~22.04.1) | | | | [linux-image-azure](https://launchpad.net/ubuntu/+source/linux-meta-azure-6.2) –  [6.2.0.1015.15~22.04.1](https://launchpad.net/ubuntu/+source/linux-meta-azure-6.2/6.2.0.1015.15~22.04.1) | | | | [linux-image-azure-fde](https://launchpad.net/ubuntu/+source/linux-meta-azure-fde-6.2) –  [6.2.0.1015.15~22.04.1.12](https://launchpad.net/ubuntu/+source/linux-meta-azure-fde-6.2/6.2.0.1015.15~22.04.1.12) | | | | [linux-image-gcp](https://launchpad.net/ubuntu/+source/linux-meta-gcp-6.2) –  [6.2.0.1017.19~22.04.1](https://launchpad.net/ubuntu/+source/linux-meta-gcp-6.2/6.2.0.1017.19~22.04.1) | | | | [linux-image-generic-64k-hwe-22.04](https://launchpad.net/ubuntu/+source/linux-meta-hwe-6.2) –  [6.2.0.35.35~22.04.13](https://launchpad.net/ubuntu/+source/linux-meta-hwe-6.2/6.2.0.35.35~22.04.13) | | | | [linux-image-generic-hwe-22.04](https://launchpad.net/ubuntu/+source/linux-meta-hwe-6.2) –  [6.2.0.35.35~22.04.13](https://launchpad.net/ubuntu/+source/linux-meta-hwe-6.2/6.2.0.35.35~22.04.13) | | | | [linux-image-generic-lpae-hwe-22.04](https://launchpad.net/ubuntu/+source/linux-meta-hwe-6.2) –  [6.2.0.35.35~22.04.13](https://launchpad.net/ubuntu/+source/linux-meta-hwe-6.2/6.2.0.35.35~22.04.13) | | | | [linux-image-lowlatency-64k-hwe-22.04](https://launchpad.net/ubuntu/+source/linux-meta-lowlatency-hwe-6.2) –  [6.2.0.1015.15~22.04.12](https://launchpad.net/ubuntu/+source/linux-meta-lowlatency-hwe-6.2/6.2.0.1015.15~22.04.12) | | | | [linux-image-lowlatency-hwe-22.04](https://launchpad.net/ubuntu/+source/linux-meta-lowlatency-hwe-6.2) –  [6.2.0.1015.15~22.04.12](https://launchpad.net/ubuntu/+source/linux-meta-lowlatency-hwe-6.2/6.2.0.1015.15~22.04.12) | | | | [linux-image-virtual-hwe-22.04](https://launchpad.net/ubuntu/+source/linux-meta-hwe-6.2) –  [6.2.0.35.35~22.04.13](https://launchpad.net/ubuntu/+source/linux-meta-hwe-6.2/6.2.0.35.35~22.04.13) | | | --- ### 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-2023-5197](https://ubuntu.com/security/CVE-2023-5197) * [CVE-2023-4921](https://ubuntu.com/security/CVE-2023-4921) * [CVE-2023-4881](https://ubuntu.com/security/CVE-2023-4881) * [CVE-2023-4623](https://ubuntu.com/security/CVE-2023-4623) * [CVE-2023-4622](https://ubuntu.com/security/CVE-2023-4622) * [CVE-2023-42756](https://ubuntu.com/security/CVE-2023-42756) * [CVE-2023-42755](https://ubuntu.com/security/CVE-2023-42755) * [CVE-2023-42753](https://ubuntu.com/security/CVE-2023-42753) * [CVE-2023-42752](https://ubuntu.com/security/CVE-2023-42752) * [CVE-2023-4244](https://ubuntu.com/security/CVE-2023-4244) --- Show 1 more references ## Related notices id="usn" *Search* * [USN-6716-1](https://ubuntu.com/security/notices/USN-6716-1) * [USN-6699-1](https://ubuntu.com/security/notices/USN-6699-1) * [USN-6681-1](https://ubuntu.com/security/notices/USN-6681-1) * [USN-6681-2](https://ubuntu.com/security/notices/USN-6681-2) * [USN-6681-3](https://ubuntu.com/security/notices/USN-6681-3) * [USN-6681-4](https://ubuntu.com/security/notices/USN-6681-4) * [USN-6572-1](https://ubuntu.com/security/notices/USN-6572-1) * [USN-6537-1](https://ubuntu.com/security/notices/USN-6537-1) * [USN-6503-1](https://ubuntu.com/security/notices/USN-6503-1) * [USN-6479-1](https://ubuntu.com/security/notices/USN-6479-1) --- Show 26 more references --- Have additional questions? 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