Apple says it has already "released mitigations in iOS 11.2, macOS 10.13.2, and tvOS 11.2 to help defend against Meltdown". Because these processors and their architecture is commonly used on almost on smartphones, laptops, computers, etc it means every single known device is vulnerable to these exploits.
The company has already issued patches in the latest versions of its MacOS, iOS, and tvOS operating systems that address one of the two potential exploits Google found for the flaw. " However, the Apple Watch is not affected by Meltdown bug".
"All Mac systems and iOS devices are affected, but there are no known exploits impacting customers at this time", the tech giant said.
Apple also advised users to only download apps from secure sources as malicious apps were one way for hackers to tap into the Meltdown and Spectre chip vulnerabilities. "We are in the process of deploying mitigations to cloud services and have also released security updates to protect Windows customers against vulnerabilities affecting supported hardware chips from Intel, ARM, and AMD", Microsoft said in a statement to The Verge.
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"Our testing with public benchmarks has shown that the changes in the December 2017 updates resulted in no measurable reduction in the performance of macOS and iOS", the company said in its blog post.
The Meltdown and Spectre issues take advantage of a modern CPU performance feature called speculative execution.
Two bugs - Meltdown and Spectre - have been identified which could now leak your sensitive data like passwords, photos, business documents to hackers thanks to "design flaws" in their manufacture.
Macs and iOS devices are vulnerable to Spectre attacks through code that can run in web browsers including Apple's own Safari.
"Check with your operating system vendor or system manufacturer and apply any available updates as soon as they are available", the company said.
Google too has issues a statement informing users that its Android phones were protected it users had the latest security updates.