The upstream fix has been applied to Xenial and newer kernels. This bug is only for Trusty.
-- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1774082 Title: Trusty cannot load microcode for family 17h AMD processors Status in linux package in Ubuntu: Invalid Status in linux source package in Trusty: In Progress Bug description: [Impact] AMD has recently updated the microcode in the linux-firmware tree for family 17h processors to address Spectre variant 2. The Trusty 3.13 kernel cannot load the microcode because it is missing a backport of upstream patch f4e9b7af0cd58dd039a0fb2cd67d57cea4889abf which leaves AMD machines vulnerable. [Test Case] Test must be done on a 17h family processor: 1) Take note of the microcode version before applying updated microcode: $ sudo cat /sys/devices/system/cpu/cpu0/microcode/version 0x8001227 2) Get updated amd64-microcode package from the Ubuntu Security Team. Install it and reboot machine. 3) Verify that the microcode version has changed. [Regression Potential] The regression potential to the kernel revolves around the fact that the IBRS/IBPB implementation in the 3.13 kernel may not have been put through its paces yet due to a lack of available microcode updates. There could be a latent bug present that is uncovered. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1774082/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
