========================================================================== Ubuntu Security Notice USN-4591-1 October 19, 2020 linux, linux-hwe, linux-hwe-5.4, linux-oem, linux-raspi, linux-raspi-5.4, linux-snapdragon vulnerabilities ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 20.04 LTS - Ubuntu 18.04 LTS - Ubuntu 16.04 LTS Summary: Several security issues were fixed in the Linux kernel. Software Description: - linux: Linux kernel - linux-raspi: Linux kernel for Raspberry Pi (V8) systems - linux-hwe-5.4: Linux hardware enablement (HWE) kernel - linux-oem: Linux kernel for OEM systems - linux-raspi-5.4: Linux kernel for Raspberry Pi (V8) systems - linux-snapdragon: Linux kernel for Qualcomm Snapdragon processors - linux-hwe: Linux hardware enablement (HWE) kernel Details: Andy Nguyen discovered that the Bluetooth L2CAP implementation in the Linux kernel contained a type-confusion error. A physically proximate remote attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2020-12351) Andy Nguyen discovered that the Bluetooth A2MP implementation in the Linux kernel did not properly initialize memory in some situations. A physically proximate remote attacker could use this to expose sensitive information (kernel memory). (CVE-2020-12352) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 20.04 LTS: linux-image-5.4.0-1022-raspi 5.4.0-1022.25 linux-image-5.4.0-52-generic 5.4.0-52.57 linux-image-5.4.0-52-generic-lpae 5.4.0-52.57 linux-image-5.4.0-52-lowlatency 5.4.0-52.57 linux-image-generic 5.4.0.52.55 linux-image-generic-hwe-18.04 5.4.0.52.55 linux-image-generic-hwe-18.04-edge 5.4.0.52.55 linux-image-generic-hwe-20.04 5.4.0.52.55 linux-image-generic-lpae 5.4.0.52.55 linux-image-generic-lpae-hwe-18.04 5.4.0.52.55 linux-image-generic-lpae-hwe-18.04-edge 5.4.0.52.55 linux-image-generic-lpae-hwe-20.04 5.4.0.52.55 linux-image-lowlatency 5.4.0.52.55 linux-image-lowlatency-hwe-18.04 5.4.0.52.55 linux-image-lowlatency-hwe-18.04-edge 5.4.0.52.55 linux-image-lowlatency-hwe-20.04 5.4.0.52.55 linux-image-oem 5.4.0.52.55 linux-image-oem-osp1 5.4.0.52.55 linux-image-raspi 5.4.0.1022.57 linux-image-raspi-hwe-18.04 5.4.0.1022.57 linux-image-raspi-hwe-18.04-edge 5.4.0.1022.57 linux-image-raspi2 5.4.0.1022.57 linux-image-raspi2-hwe-18.04 5.4.0.1022.57 linux-image-raspi2-hwe-18.04-edge 5.4.0.1022.57 linux-image-virtual 5.4.0.52.55 linux-image-virtual-hwe-18.04 5.4.0.52.55 linux-image-virtual-hwe-18.04-edge 5.4.0.52.55 linux-image-virtual-hwe-20.04 5.4.0.52.55 Ubuntu 18.04 LTS: linux-image-4.15.0-1090-snapdragon 4.15.0-1090.99 linux-image-4.15.0-1100-oem 4.15.0-1100.110 linux-image-4.15.0-122-generic 4.15.0-122.124 linux-image-4.15.0-122-generic-lpae 4.15.0-122.124 linux-image-4.15.0-122-lowlatency 4.15.0-122.124 linux-image-5.4.0-1022-raspi 5.4.0-1022.25~18.04.1 linux-image-5.4.0-52-generic 5.4.0-52.57~18.04.1 linux-image-5.4.0-52-generic-lpae 5.4.0-52.57~18.04.1 linux-image-5.4.0-52-lowlatency 5.4.0-52.57~18.04.1 linux-image-generic 4.15.0.122.109 linux-image-generic-hwe-18.04 5.4.0.52.57~18.04.46 linux-image-generic-lpae 4.15.0.122.109 linux-image-generic-lpae-hwe-18.04 5.4.0.52.57~18.04.46 linux-image-lowlatency 4.15.0.122.109 linux-image-lowlatency-hwe-18.04 5.4.0.52.57~18.04.46 linux-image-oem 4.15.0.1100.104 linux-image-powerpc-e500mc 4.15.0.122.109 linux-image-powerpc-smp 4.15.0.122.109 linux-image-powerpc64-emb 4.15.0.122.109 linux-image-powerpc64-smp 4.15.0.122.109 linux-image-raspi-hwe-18.04 5.4.0.1022.26 linux-image-snapdragon 4.15.0.1090.93 linux-image-snapdragon-hwe-18.04 5.4.0.52.57~18.04.46 linux-image-virtual 4.15.0.122.109 linux-image-virtual-hwe-18.04 5.4.0.52.57~18.04.46 Ubuntu 16.04 LTS: linux-image-4.15.0-122-generic 4.15.0-122.124~16.04.1 linux-image-4.15.0-122-generic-lpae 4.15.0-122.124~16.04.1 linux-image-4.15.0-122-lowlatency 4.15.0-122.124~16.04.1 linux-image-generic-hwe-16.04 4.15.0.122.122 linux-image-generic-hwe-16.04-edge 4.15.0.122.122 linux-image-generic-lpae-hwe-16.04 4.15.0.122.122 linux-image-generic-lpae-hwe-16.04-edge 4.15.0.122.122 linux-image-lowlatency-hwe-16.04 4.15.0.122.122 linux-image-lowlatency-hwe-16.04-edge 4.15.0.122.122 linux-image-oem 4.15.0.122.122 linux-image-virtual-hwe-16.04 4.15.0.122.122 linux-image-virtual-hwe-16.04-edge 4.15.0.122.122 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/4591-1 CVE-2020-12351, CVE-2020-12352 Package Information: https://launchpad.net/ubuntu/+source/linux/5.4.0-52.57 https://launchpad.net/ubuntu/+source/linux-raspi/5.4.0-1022.25 https://launchpad.net/ubuntu/+source/linux/4.15.0-122.124 https://launchpad.net/ubuntu/+source/linux-hwe-5.4/5.4.0-52.57~18.04.1 https://launchpad.net/ubuntu/+source/linux-oem/4.15.0-1100.110 https://launchpad.net/ubuntu/+source/linux-raspi-5.4/5.4.0-1022.25~18.04.1 https://launchpad.net/ubuntu/+source/linux-snapdragon/4.15.0-1090.99 https://launchpad.net/ubuntu/+source/linux-hwe/4.15.0-122.124~16.04.1