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Intel promised microcode updates to resolve the vulnerability. [1] The microcode patches have been shown to significantly reduce the performance of some heavily-vectorized loads. [7] Patches to mitigate the effects of the vulnerability have also been created as part of the forthcoming version 6.5 release of the Linux kernel. [8]
Raptor Lake is Intel's codename for the 13th and 14th generations of Intel Core processors based on a hybrid architecture, utilizing Raptor Cove performance cores and Gracemont efficient cores. [ 3 ] [ 4 ] [ 5 ] Like Alder Lake , Raptor Lake is fabricated using Intel's Intel 7 process.
Intel reported that they are preparing new patches to mitigate these flaws. [24] On August 14, 2018, Intel disclosed three additional chip flaws referred to as L1 Terminal Fault (L1TF). They reported that previously released microcode updates, along with new, pre-release microcode updates can be used to mitigate these flaws. [25] [26]
In the mid-1990s, a facility for supplying new microcode was initially referred to as the Pentium Pro BIOS Update Feature. [18] [19] It was intended that user-mode applications should make a BIOS interrupt call to supply a new "BIOS Update Data Block", which the BIOS would partially validate and save to nonvolatile BIOS memory; this could be supplied to the installed processors on next boot.
Meltdown exploits a race condition, inherent in the design of many modern CPUs.This occurs between memory access and privilege checking during instruction processing. . Additionally, combined with a cache side-channel attack, this vulnerability allows a process to bypass the normal privilege checks that isolate the exploit process from accessing data belonging to the operating system and other ...
On 29 January 2018, Microsoft was reported to have released a Windows update that disabled the problematic Intel Microcode fix—which had, in some cases, caused reboots, system instability, and data loss or corruption—issued earlier by Intel for the Spectre Variant 2 attack.
Intel is planning to address Variant 4 by releasing a microcode patch that creates a new hardware flag named Speculative Store Bypass Disable (SSBD). [ 7 ] [ 2 ] [ 12 ] A stable microcode patch is yet to be delivered, with Intel suggesting that the patch will be ready "in the coming weeks".
Intel incorporated fixes in its processors starting shortly before the public announcement of the vulnerabilities. [ 1 ] On 14 May 2019, a mitigation was released for the Linux kernel , [ 18 ] and Apple , Google , Microsoft , and Amazon released emergency patches for their products to mitigate ZombieLoad.