Lazy fp state restore, new vulnerability in intel processors

We keep talking about new vulnerabilities in Intel processors, this time researchers have discovered a security issue called Lazy FP State Restore, which affects modern Intel Core and Xeon processors.

Lazy FP State Restore is a new security breach in Intel processors since Sandy Bridges

Lazy FP State Restore is an exploit that can be exploited to obtain sensitive information, including cryptographic keys used to protect the information. This security issue is reported to affect all Intel Sandy Bridge and later processors, making millions of vulnerable users worldwide.

We recommend reading our post about Intel working on 22-core processors for LGA 2066 and 8-core processors for LGA 1151

This Lazy FP State Restore vulnerability can be exploited through a series of commands, which are used to alter the FPU states of running applications. With this, information can be obtained from the FPUs that can be used later to obtain sensitive data about the activity of the applications. Intel is already working with operating system developers to offer users patches to mitigate or fix this new vulnerability.

For now , AMD processors are not known to be affected by this security breach. Without a doubt, this is a new setback for an Intel that has already been affected by numerous security problems, although until now no malware based on them has been detected that could put the security of users at risk.

We will have to be on the lookout for new information about this vulnerability in the coming days, we will inform you as soon as anything is known about mitigations via software.

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