========================================================================== Ubuntu Security Notice USN-4694-1 January 14, 2021 linux, linux-hwe, linux-hwe-5.4, linux-hwe-5.8, linux-lts-xenial vulnerability ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 20.10 - Ubuntu 20.04 LTS - Ubuntu 18.04 LTS - Ubuntu 16.04 LTS - Ubuntu 14.04 ESM Summary: The system could allow unintended access to data in some environments. Software Description: - linux: Linux kernel - linux-hwe-5.8: Linux hardware enablement (HWE) kernel - linux-hwe-5.4: Linux hardware enablement (HWE) kernel - linux-hwe: Linux hardware enablement (HWE) kernel - linux-lts-xenial: Linux hardware enablement kernel from Xenial for Trusty Details: It was discovered that the LIO SCSI target implementation in the Linux kernel performed insufficient identifier checking in certain XCOPY requests. An attacker with access to at least one LUN in a multiple backstore environment could use this to expose sensitive information or modify data. Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 20.10: linux-image-5.8.0-38-generic 5.8.0-38.43 linux-image-5.8.0-38-generic-64k 5.8.0-38.43 linux-image-5.8.0-38-generic-lpae 5.8.0-38.43 linux-image-5.8.0-38-lowlatency 5.8.0-38.43 linux-image-generic 5.8.0.38.42 linux-image-generic-64k 5.8.0.38.42 linux-image-generic-lpae 5.8.0.38.42 linux-image-lowlatency 5.8.0.38.42 linux-image-virtual 5.8.0.38.42 Ubuntu 20.04 LTS: linux-image-5.4.0-62-generic 5.4.0-62.70 linux-image-5.4.0-62-generic-lpae 5.4.0-62.70 linux-image-5.4.0-62-lowlatency 5.4.0-62.70 linux-image-5.8.0-38-generic 5.8.0-38.43~20.04.1 linux-image-5.8.0-38-generic-lpae 5.8.0-38.43~20.04.1 linux-image-5.8.0-38-lowlatency 5.8.0-38.43~20.04.1 linux-image-generic 5.4.0.62.65 linux-image-generic-hwe-20.04 5.8.0.38.43~20.04.23 linux-image-generic-lpae 5.4.0.62.65 linux-image-generic-lpae-hwe-20.04 5.8.0.38.43~20.04.23 linux-image-lowlatency 5.4.0.62.65 linux-image-lowlatency-hwe-20.04 5.8.0.38.43~20.04.23 linux-image-oem 5.4.0.62.65 linux-image-oem-osp1 5.4.0.62.65 linux-image-virtual 5.4.0.62.65 linux-image-virtual-hwe-20.04 5.8.0.38.43~20.04.23 Ubuntu 18.04 LTS: linux-image-4.15.0-132-generic 4.15.0-132.136 linux-image-4.15.0-132-generic-lpae 4.15.0-132.136 linux-image-4.15.0-132-lowlatency 4.15.0-132.136 linux-image-5.4.0-62-generic 5.4.0-62.70~18.04.1 linux-image-5.4.0-62-generic-lpae 5.4.0-62.70~18.04.1 linux-image-5.4.0-62-lowlatency 5.4.0-62.70~18.04.1 linux-image-generic 4.15.0.132.119 linux-image-generic-hwe-18.04 5.4.0.62.70~18.04.57 linux-image-generic-lpae 4.15.0.132.119 linux-image-generic-lpae-hwe-18.04 5.4.0.62.70~18.04.57 linux-image-lowlatency 4.15.0.132.119 linux-image-lowlatency-hwe-18.04 5.4.0.62.70~18.04.57 linux-image-oem 5.4.0.62.70~18.04.57 linux-image-oem-osp1 5.4.0.62.70~18.04.57 linux-image-powerpc-e500mc 4.15.0.132.119 linux-image-powerpc-smp 4.15.0.132.119 linux-image-powerpc64-emb 4.15.0.132.119 linux-image-powerpc64-smp 4.15.0.132.119 linux-image-snapdragon-hwe-18.04 5.4.0.62.70~18.04.57 linux-image-virtual 4.15.0.132.119 linux-image-virtual-hwe-18.04 5.4.0.62.70~18.04.57 Ubuntu 16.04 LTS: linux-image-4.15.0-132-generic 4.15.0-132.136~16.04.1 linux-image-4.15.0-132-generic-lpae 4.15.0-132.136~16.04.1 linux-image-4.15.0-132-lowlatency 4.15.0-132.136~16.04.1 linux-image-4.4.0-200-generic 4.4.0-200.232 linux-image-4.4.0-200-generic-lpae 4.4.0-200.232 linux-image-4.4.0-200-lowlatency 4.4.0-200.232 linux-image-4.4.0-200-powerpc-e500mc 4.4.0-200.232 linux-image-4.4.0-200-powerpc-smp 4.4.0-200.232 linux-image-4.4.0-200-powerpc64-emb 4.4.0-200.232 linux-image-4.4.0-200-powerpc64-smp 4.4.0-200.232 linux-image-generic 4.4.0.200.206 linux-image-generic-hwe-16.04 4.15.0.132.130 linux-image-generic-lpae 4.4.0.200.206 linux-image-generic-lpae-hwe-16.04 4.15.0.132.130 linux-image-lowlatency 4.4.0.200.206 linux-image-lowlatency-hwe-16.04 4.15.0.132.130 linux-image-oem 4.15.0.132.130 linux-image-powerpc-e500mc 4.4.0.200.206 linux-image-powerpc-smp 4.4.0.200.206 linux-image-powerpc64-emb 4.4.0.200.206 linux-image-powerpc64-smp 4.4.0.200.206 linux-image-virtual 4.4.0.200.206 linux-image-virtual-hwe-16.04 4.15.0.132.130 Ubuntu 14.04 ESM: linux-image-4.4.0-200-generic 4.4.0-200.232~14.04.1 linux-image-4.4.0-200-generic-lpae 4.4.0-200.232~14.04.1 linux-image-4.4.0-200-lowlatency 4.4.0-200.232~14.04.1 linux-image-4.4.0-200-powerpc-e500mc 4.4.0-200.232~14.04.1 linux-image-4.4.0-200-powerpc-smp 4.4.0-200.232~14.04.1 linux-image-4.4.0-200-powerpc64-emb 4.4.0-200.232~14.04.1 linux-image-4.4.0-200-powerpc64-smp 4.4.0-200.232~14.04.1 linux-image-generic-lpae-lts-xenial 4.4.0.200.175 linux-image-generic-lts-xenial 4.4.0.200.175 linux-image-lowlatency-lts-xenial 4.4.0.200.175 linux-image-powerpc-e500mc-lts-xenial 4.4.0.200.175 linux-image-powerpc-smp-lts-xenial 4.4.0.200.175 linux-image-powerpc64-emb-lts-xenial 4.4.0.200.175 linux-image-powerpc64-smp-lts-xenial 4.4.0.200.175 linux-image-virtual-lts-xenial 4.4.0.200.175 After a standard system update you need to reboot your computer to make all the necessary changes. 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. References: https://usn.ubuntu.com/4694-1 CVE-2020-28374 Package Information: https://launchpad.net/ubuntu/+source/linux/5.8.0-38.43 https://launchpad.net/ubuntu/+source/linux/5.4.0-62.70 https://launchpad.net/ubuntu/+source/linux-hwe-5.8/5.8.0-38.43~20.04.1 https://launchpad.net/ubuntu/+source/linux/4.15.0-132.136 https://launchpad.net/ubuntu/+source/linux-hwe-5.4/5.4.0-62.70~18.04.1 https://launchpad.net/ubuntu/+source/linux/4.4.0-200.232 https://launchpad.net/ubuntu/+source/linux-hwe/4.15.0-132.136~16.04.1