Continuing his reverse-engineering of the Intel 8087, [Ken Shirriff] covers the conditional tests that are implemented in the microcode of this floating point processing unit (FPU). This microcode ...

The CPU is a simple stack virtual machine with a specialized reduced instruction set. Execution algorithm: The VM fetches an opcode from system memory pointed by CS:IP. There is a table of instruction ...

Bottom line: Chipmakers typically use microcode updates to fix bugs and improve CPU reliability. However, this low-level layer between hardware and machine code can also serve as a stealthy attack ...

A researcher from Rapid7 created a working Proof of Concept for a CPU ransomware Such a ransomware would persist on a device even after the hard drive had been replaced The PoC will (most likely) ...

We are once again asking everyone to update their stuff. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Add us as a preferred source on Google ...

What just happened? A significant vulnerability, known as EntrySign, has been uncovered by Google security researchers, affecting all AMD Zen processors from Zen 1 to Zen 4. This flaw allows attackers ...

Opinion All malicious attacks on digital systems have one common aim: taking control. Mostly, that means getting a CPU somewhere to turn traitor, running code that silently steals or scrambles your ...

Google researchers recently published proof-of-concept code demonstrating the ability to create malicious microcode patches on AMD processors from Zen 1 through Zen 4. This vulnerability would allow ...

When AMD finally issued patches for its critical microcode security hole on Monday, it said that the glitch 'could lead to the loss of Secure Encrypted Virtualization protection.' AMD on Monday issued ...

AMD has confirmed an unpatched “processor vulnerability” that may require CISOs to isolate their systems or even air gap them until there’s a fix. AMD has had to confirm the existence of a major ...

Chipzilla’s latest "0x114" microcode update appears unable to resolve persistent performance issues plaguing its Arrow Lake-S processors. Recent benchmarks have revealed further degradation making ...