https://www.bleepingcomputer.com/news/security/researchers-disclose-new-foreshadow-l1tf-vulnerabilities-affecting-intel-cpus/

Academics and private sector researchers have revealed details today about three new vulnerabilities affecting Intel CPUs.

All three are Spectre-class attacks that take advantage of a CPU design feature named speculative execution —a feature found in all modern CPUs that has the role of improving performance by computing operations in advance and later discarding unneeded data.