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Intel's Software Guard Extensions (SGX) security subsystem is also affected by this bug. [4]The Downfall vulnerability was discovered by the security researcher Daniel Moghimi, who publicly released information about the vulnerability in August 2023, after a year-long embargo period.
Intel introduced speculative execution to their processors with Intel's P6 family microarchitecture with the Pentium Pro IA-32 microprocessor in 1995. [71] ARM has reported that the majority of their processors are not vulnerable, and published a list of the specific processors that are affected.
Newer Intel microarchitectures as well as AMD starting with Zen 3 are not affected. The mitigations for the vulnerability decrease the performance of the affected Intel CPUs by up to 39%, while AMD CPUs lose up to 14%. In August 2022, the SQUIP vulnerability was disclosed affecting Ryzen 2000–5000 series CPUs. [52]
The vulnerability is known to affect Skylake and later processors from Intel and Zen-based processors from AMD. [ 54 ] In February 2023, a team of researchers at North Carolina State University uncovered a new code execution vulnerability called Spectre-HD, also known as "Spectre SRV" or "Spectre v6".
Reptar is a CPU vulnerability discovered in late 2023, affecting a number of recent families of Intel x86 CPUs. According to The Register, the following CPU families are vulnerable: Alder Lake, Raptor Lake and Sapphire Rapids. [1] The Reptar vulnerability relates to processing of x86 instruction prefixes in ways that lead to unexpected behavior ...
Newer Intel microarchitectures as well as AMD starting with Zen 3 are not affected. The mitigations for the vulnerability decrease the performance of the affected Intel CPUs by up to 39%, while AMD CPUs lose up to 14%. In August 2022, the SQUIP vulnerability was disclosed affecting Ryzen 2000–5000 series CPUs. [52]
The latest badge promoting the Intel Core branding. The following is a list of Intel Core processors.This includes Intel's original Core (Solo/Duo) mobile series based on the Enhanced Pentium M microarchitecture, as well as its Core 2- (Solo/Duo/Quad/Extreme), Core i3-, Core i5-, Core i7-, Core i9-, Core M- (m3/m5/m7/m9), Core 3-, Core 5-, and Core 7- Core 9-, branded processors.
The exploit has been verified to work against Intel and AMD processors, with Intel's security advisory stating that all Intel processors are affected. [7] Other processors using frequency scaling exist, but the attack has not been tested on them. Neither Intel nor AMD are planning to release microcode patches, instead advising to harden ...
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