--- title: 'USN-6511-1: OpenZFS vulnerability | 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-6511-1 --- 1. [Ubuntu Security Notices](https://ubuntu.com/security/notices) 2. USN-6511-1 --- # USN-6511-1: OpenZFS vulnerability Publication date 23 November 2023 Overview OpenZFS could allow unintended access to network services. Releases [23.04](https://ubuntu.com/security/notices?release=lunar) [22.04 LTS](https://ubuntu.com/security/notices?release=jammy) [20.04 LTS](https://ubuntu.com/security/notices?release=focal) --- Open side navigation ## Packages * [zfs-linux](https://ubuntu.com/security/cves?package=zfs-linux) - OpenZFS filesystem for Linux ## Details It was discovered that the OpenZFS sharenfs feature incorrectly handled IPv6 address data. This could result in IPv6 restrictions not being applied, contrary to expectations. ## 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) The problem can be corrected by updating your system to the following package versions: | Ubuntu Release | Package Version | | --- | --- | | 23.04 lunar | [libuutil3linux](https://launchpad.net/ubuntu/+source/zfs-linux) –  [2.1.9-2ubuntu1.2](https://launchpad.net/ubuntu/+source/zfs-linux/2.1.9-2ubuntu1.2) | | | | [zfsutils-linux](https://launchpad.net/ubuntu/+source/zfs-linux) –  [2.1.9-2ubuntu1.2](https://launchpad.net/ubuntu/+source/zfs-linux/2.1.9-2ubuntu1.2) | | | | 22.04 LTS jammy | [libuutil3linux](https://launchpad.net/ubuntu/+source/zfs-linux) –  [2.1.5-1ubuntu6~22.04.2](https://launchpad.net/ubuntu/+source/zfs-linux/2.1.5-1ubuntu6~22.04.2) | | | | [zfsutils-linux](https://launchpad.net/ubuntu/+source/zfs-linux) –  [2.1.5-1ubuntu6~22.04.2](https://launchpad.net/ubuntu/+source/zfs-linux/2.1.5-1ubuntu6~22.04.2) | | | | 20.04 LTS focal | [libuutil1linux](https://launchpad.net/ubuntu/+source/zfs-linux) –  [0.8.3-1ubuntu12.16](https://launchpad.net/ubuntu/+source/zfs-linux/0.8.3-1ubuntu12.16) | | | | [zfsutils-linux](https://launchpad.net/ubuntu/+source/zfs-linux) –  [0.8.3-1ubuntu12.16](https://launchpad.net/ubuntu/+source/zfs-linux/0.8.3-1ubuntu12.16) | | | --- ### 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-2013-20001](https://ubuntu.com/security/CVE-2013-20001)