Microsoft update: Downfall vulnerability patch disabling method removed

News on September 6, Microsoft’s latest update KB5029778 has attracted widespread attention. It is understood that this update involves Downfall on Intel processors Bug fixes. The Downfall vulnerability is a significant security challenge for Intel processors, affecting all modern Intel processors from 12th generation to Alder Lake CPUs CPU. This vulnerability can lead to the theft of sensitive information from the system's most secure environments, including the user kernel, processes, virtual machines, and trusted execution environments.

To address this vulnerability, Intel released version 23.3 of the Platform Update (IPU) microcode update. However, although this patch is to improve the security of the system, it also brings a big problem, which may cause CPU performance to decrease. Although Microsoft did not provide specific performance loss data, some test results show that performance may drop by up to 39%.

For users who are not severely affected, Microsoft still recommends installing this update to ensure system security. However, Microsoft has removed the option to disable Downfall for those with higher performance requirements. Official option for vulnerability patching. This means that users can no longer use the previously mentioned method to disable vulnerability fixes.

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