https://www.qubes-os.org/news/2019/11/13/qsb-053/
QSB #053: TSX Asynchronous Abort speculative side channel (XSA-305) | Qubes OS
We have just published Qubes Security Bulletin (QSB) #053: TSX Asynchronous Abort speculative side channel (XSA-305). The text of this QSB is reproduced below....
tsx asynchronous abort