Intel has released a new update for Skylake U, Y, H and S series CPUs to patch the Spectre exploit. The patch will be available through OEM updates so make sure to keep an eye out for an update and download soon. It's unclear when Broadwell and Haswell will be patched.
Having initially rolled out a patch in January, Intel ended up having to roll back the update after it became apparent the patch had some problems of its own. Microsoft also issued an emergency update which removed Intel's buggy patch.
The Spectre exploit became known to the public in at the start of January and uses 'observable differences' in branch prediction to reveal what should be private data to attackers. Branch prediction is present in almost all commonly used CPU's released within the last decade or more including other architectures such as ARM.
Intel isn't the only company to feel backlash after not handling the exploit appropriately, with Microsoft rolling out an update which rendered some AMD PCs unable to boot, and Apple being sued for not informing their users of susceptibility. The situation seemed salient enough that even the U.S. Congress weighed in on the situation.