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Debian Releases Updated Intel Microcode for Coffe Lake CPUs, Fixes Regression

Last month on November 13th, the Debian Project shipped updated CPU microcode for various types of Intel CPUs to mitigate the TAA (TSX Asynchronous Abort) vulnerability (CVE-2019-11135). But not all Intel CPU models were covered by the update, so they released a new intel-microcode security update that addresses this flaw for Coffe Lake processors too. Additionally, the new intel-microcode security update addresses a regression on HEDT and Xeon processors with signature 0x50654 that may have caused hangs on warm reboots by rolling back the CPU microcode. Therefore, users who installed the previous update are urged to update the intel-microcode package as soon as possible and also install the latest Linux kernel update.