From 2e4c5489022663276902c993c8b026adc27c5ed9 Mon Sep 17 00:00:00 2001 From: speck for Pawan Gupta Date: Mon, 6 May 2019 12:23:50 -0700 Subject: x86/mds: Add MDSUM variant to the MDS documentation commit e672f8bf71c66253197e503f75c771dd28ada4a0 upstream Updated the documentation for a new CVE-2019-11091 Microarchitectural Data Sampling Uncacheable Memory (MDSUM) which is a variant of Microarchitectural Data Sampling (MDS). MDS is a family of side channel attacks on internal buffers in Intel CPUs. MDSUM is a special case of MSBDS, MFBDS and MLPDS. An uncacheable load from memory that takes a fault or assist can leave data in a microarchitectural structure that may later be observed using one of the same methods used by MSBDS, MFBDS or MLPDS. There are no new code changes expected for MDSUM. The existing mitigation for MDS applies to MDSUM as well. Signed-off-by: Pawan Gupta Signed-off-by: Thomas Gleixner Reviewed-by: Tyler Hicks Reviewed-by: Jon Masters Signed-off-by: Greg Kroah-Hartman --- Documentation/admin-guide/hw-vuln/mds.rst | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) (limited to 'Documentation/admin-guide') diff --git a/Documentation/admin-guide/hw-vuln/mds.rst b/Documentation/admin-guide/hw-vuln/mds.rst index 244ab47d1fb3..e0dccf414eca 100644 --- a/Documentation/admin-guide/hw-vuln/mds.rst +++ b/Documentation/admin-guide/hw-vuln/mds.rst @@ -32,11 +32,12 @@ Related CVEs The following CVE entries are related to the MDS vulnerability: - ============== ===== ============================================== + ============== ===== =================================================== CVE-2018-12126 MSBDS Microarchitectural Store Buffer Data Sampling CVE-2018-12130 MFBDS Microarchitectural Fill Buffer Data Sampling CVE-2018-12127 MLPDS Microarchitectural Load Port Data Sampling - ============== ===== ============================================== + CVE-2019-11091 MDSUM Microarchitectural Data Sampling Uncacheable Memory + ============== ===== =================================================== Problem ------- -- cgit v1.2.3