Azure Sphere OS version 20.12 is now available

The Azure Sphere 20.12 OS quality release is now available in the Retail feed. This update includes enhancements and bug fixes in the Azure Sphere OS; it does not include an updated SDK. The 20.12 release incorporates the following changes and bug fixes: * Reduced the maximum transmission unit (MTU) from 1500 bytes to 1420 bytes. * Improved device update in congested networks. * Fixed an issue wherein the Wi-Fi module stops scanning but does not respond with a completion event if a background scan is running and the active Wi-Fi network is deleted. * Fixed a bug wherein **I2CMaster\_Write()** returns EBUSY when re-sideloading the app interrupts operation. * Fixed an Ethernet connection issue for devices with both Wi-Fi and Ethernet enabled. In some cases, upon rebooting the device the Ethernet link-up appeared to be down when it is connected to a network. * CVE-2020-17002 - a patch for this CVE addresses an issue where the Azure IoT C SDK did not enable host name validation when using wolfSSL to establish a TLS connection with Azure IoT. For more information on Azure Sphere OS feeds and setting up an evaluation device group, see [Azure Sphere OS feeds](https://docs.microsoft.com/azure-sphere/deployment/deployment-microsoft-feeds). For self-help technical inquiries, please visit [Microsoft Q&A](https://docs.microsoft.com/answers/search.html?c=&includeChildren=&f=&type=question+OR+idea+OR+kbentry+OR+answer+OR+topic+OR+user&redirect=search%2Fsearch&sort=relevance&q=azure%20sphere%20OS) or [Stack Overflow](https://stackoverflow.com/search?q=azuresphere&s=23550afd-6ece-47d5-a84f-2d0dc6fc9cf5&s=fdc0e803-180b-472b-8b2e-987feaf5a175). If you require technical support and have a support plan, please submit a support ticket in [Microsoft Azure Support](https://ms.portal.azure.com/?quickstart=true&CAF=true#blade/Microsoft%5FAzure%5FSupport/HelpAndSupportBlade/overview) or work with your Microsoft Technical Account Manager. If you would like to purchase a support plan, please explore the [Azure support plans](https://aka.ms/azuresupport/). * Azure Sphere * Operating System * [ Azure Sphere](https://azure.microsoft.com/en-gb/services/azure-sphere/)