Intel Releases Security Advisory for Microprocessors

Number: AV18-100
Date: 14 June 2018


The purpose of this advisory is to bring attention to an Intel security advisory regarding the Lazy FP state restore vulnerability affecting Intel Core-based microprocessors.


System software may opt to utilize Lazy FP which is potentially vulnerable to exploits
where one process may infer register values of other processes through a speculative
execution side channel that infers their value. Unauthenticated actors could take advantage of this vulnerability and acquire sensitive encryption keys. 

Affected Products:

CVE Reference:  CVE-2018-3665

Suggested Action

CCIRC recommends that owner/operators test and deploy the vendor released updates to the affected platforms in accordance with their risk mitigation framework.


Note to Readers

In support of Public Safety's mission to build a safe and resilient Canada, CCIRC's mandate is to help ensure the security and resilience of the vital non-federal government cyber systems that underpin Canada's national security, public safety and economic prosperity. As Canada's computer security incident response team, CCIRC is Canada's national coordination centre for the prevention and mitigation of, preparedness for, response to, and recovery from cyber incidents on non-federal government systems. It does this by providing authoritative advice and support, and coordinating information sharing and incident response.

Please note, CCIRC PGP key has recently been updated.

For general information, please contact Public Safety Canada's Public Affairs division at:

Telephone: 613-944-4875 or 1-800-830-3118
Fax: 613-998-9589

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