Security flax discovered in Intel's processors

Skylake and Kaby Lake CPUs have broken hyper-threading

Skylake users are also provided with recommendations on addressing the issue, being advised by the report to: "Contact your system vendor for a BIOS/UEFI update that fixes "Intel erratum SKW144, SKL150, SKX150, SKZ7, or the similar one for my Skylake processor". This can only happen when both logical processors on the same physical processor are active.

Symptoms can include application and system misbehaviour, data corruption, data loss and voting Donald Trump.

Intel's Hyper-Threading is the term given to the process the chipmaker uses to run tasks across the multiple core found in modern processors at the same time.

Intel says "due to this erratum, the system may experience unpredictable system behavior", and that a BIOS fix could prevent the issue from occurring.




In English, this means that both Skylake and Kaby Lake platforms have inherent bugs in their microcoding.

Intel's errata list for the recent Skylake-X processors (unearthed by Hot Hardware), provide a bit more insight into the nuts and bolts of the issue. 'Disable hyper-threading immediately in BIOS/UEFI to work around the problem.

Debian developer Henrique de Moraes Holschuh is now warning users of a widely known GNU/Linux distribution about a new security error which is affecting Intel's 6 and 7 generation Skylake and Kabylake processors supporting HyperThreading.

According to the Debian mailing, the bug was triggered by members of the OCaml community, who were able to demonstrate the issue using the OCaml compiler. The latter option may not be ideal as users are at the mercy of the motherboard vendors update plans. Those on older Skylake parts have the choice of either installing a UEFI update, if available, or if running a Linux-based operating system can install the intel-microcode package version 3.20170511.1 or above to implant the same microcode-based fix at the kernel level. We've sent along the requisite request to Intel for more information and will update accordingly.

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