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Meltdown (security vulnerability) - Wikipedia

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Meltdown is one of the two original transient execution CPU vulnerabilities (the other being Spectre). Meltdown affects Intel x86 microprocessors, IBM POWER processors,[1] and some ARM-based microprocessors.[2][3][4] It allows a rogue process to read all memory, even when it is not authorized to do so. Meltdown affects a wide range of systems. At the time of disclosure (2018), this included all devices running any but the most recent and patched versions of iOS,[5] Linux,[6][7] macOS,[5] or Windows. Accordingly, many servers and cloud services were impacted,[8] as well as a potential majority of smart devices and embedded devices using ARM-based processors (mobile devices, smart TVs, printers and others), including a wide range of networking equipment. A purely software workaround to Meltdown has been assessed as slowing computers between 5 and 30 percent in certain specialized workloads,[9] although companies responsible for software correction of the exploit reported minimal impact f

Meltdown (security vulnerability) - Wikipedia Jump to content From Wikipedia, the free encyclopedia This article needs to be updated . Please help update this article to reflect recent events or newly available information. ( March 2026 ) Microprocessor security vulnerability See also: Speculative execution CPU vulnerabilities Meltdown The logo used by the team that discovered the vulnerability CVE identifier CVE - 2017-5754 Date discovered January 2018 ; 8 years ago ( 2018-01 ) Affected hardware Intel x86 microprocessors , IBM Power microprocessors , and some ARM -based microprocessors Websit

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