I am using debian as a Linux distro and from today’s updates there is an update to the microcode with this log:
== 3.20191112.1 ==
* New upstream microcode datafile 20191112 + SECURITY UPDATE - Implements MDS mitigation (TSX TAA), INTEL-SA-00270, CVE-2019-11135 - Implements TA Indirect Sharing mitigation, and improves the MDS mitigation (VERW) - Fixes FIVR (Xeon Voltage Modulation) vulnerability, INTEL-SA-00271, CVE-2019-11139 - Fixes SGX vulnerabilities and errata (including CVE-2019-0117) + CRITICAL WRONG FIXES - Fixes Jcc conditional jump macro-fusion erratum (Skylake +, except Ice Lake), causes a 0-3% typical perforance hit (can be as bad as 10%). But it does not even dream of not applying this fix. - Fixes AVX SHUF * instruction implementation flaw erratum + Removed Microcodes: sig 0x000906ec, pfmask 0x22, 2019-02-14, rev 0x00ae, size 98304 + New Microcodes: sig 0x000406d8, pfmask 0x01, 2019-09-16, rev 0x012d, size 84992 sig 0x00050656, pfmask 0xbf, 2019-09-05, rev 0x400002c, size 51200 sig 0x00060663, pfmask 0x80, 2018-04-17, rev 0x002a, size 87040 sig 0x000706a8, pfmask 0x01, 2019-08-29, rev 0x0016, size 74752 sig 0x000706e5, pfmask 0x80, 2019-09-05, rev 0x0046, size 102400 sig 0x000a0660, pfmask 0x80, 2019-08-27, rev 0x00c6, size 91136 + Updated Microcodes: sig 0x000406e3, pfmask 0xc0, 2019-08- 14, rev 0x00d4, size 101376 sig 0x00050654, pfmask 0xb7, 2019-09-05, rev 0x2000065, size 34816 sig 0x00050657, pfmask 0xbf, 2019-09-05, rev 0x500002c, size 51200 sig 0x000506e3, pfmask 0x36, 2019-08 -14, rev 0x00d4, size 101376 sig 0x000706a1, pfmask 0x01, 2019-08-28, rev 0x0032, size 73728 sig 0x000806e9, pfmask 0x10, 2019-08-14, rev 0x00c6, size 99328 sig 0x000806e9, pfmask 0xc0, 2019- 08 -14, rev 0x00c6, size 100352 sig 0x000806ea, pfmask 0xc0, 2019-08-14, rev 0x00c6, size 99328 sig 0x000806eb, pfmask 0xd0, 2019-08-14, rev 0x00c6, size 100352 sig 0x000806ec, pfmask 0x94, 2019- 08-14, rev 0x00c6, size 100352 sig 0x000906e9, pfmask 0x2a, 2019-08-14, rev 0x00c6, size 100352 sig 0x000906ea, pfmask 0x22, 2019-08-14, rev 0x00c6, size 99328 sig 0x000906eb, pfmask 0x02, 2019 -08-14, rev 0x00c6, size 100352 sig 0x000906ed, pfmask 0x22, 2019-08-14, rev 0x00c6, size 99328 + Updated Microcodes (previously removed): sig 0x00050653, pfmask 0x97, 2019-09-09, rev 0x1000151, size 32768 - Henrique de Moraes Holschuh <[email protected]> Tue, 12 Nov 2019 23:21:54 -0300