The offering is part of Microsoft's new limited-time bug bounty programme for "speculative execution" side-channel vulnerabilities.
"This new class of vulnerabilities was disclosed in January 2018 and represented a major advancement in the research in this field," Microsoft said in a blog post on Wednesday.
"In recognition of that threat environment change, we are launching a bounty programme to encourage research into the new class of vulnerability and the mitigations Microsoft has put in place to help mitigate this class of issues," it added.
"Speculative execution is truly a new class of vulnerabilities, and we expect that research is already underway exploring new attack methods," said Phillip Misner, a security group manager at Microsoft.
The bug bounty programme is open till December 31.