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Meltdown, also known as Rogue Data Cache Load and tracked as CVE-2017-5754, is a hardware side-channel vulnerability in modern processors that arises from speculative execution behavior. On affected CPUs, a user-mode process can speculatively perform loads from privileged kernel-mapped memory before permission checks are fully enforced, and although the speculative results are not architecturally committed, they can leave observable traces in the data cache. An attacker can then use cache side-channel techniques to infer the accessed data and recover contents of kernel memory that should be inaccessible to unprivileged code. The issue breaks the intended isolation between user space and kernel space and has been described as affecting Intel processors most prominently, with additional impact reported for some ARM and other architectures in certain contexts.
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What an attacker gets, and what they’ve been doing with it.
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1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos (4 hidden).
This repository is a proof-of-concept (PoC) exploit for the Meltdown vulnerability (CVE-2017-5754) affecting certain CPUs and the Linux kernel. The structure consists of two main directories: 'cache' (demonstrating cache timing) and 'meltdown' (the actual exploit). The 'meltdown' directory contains the main exploit code, which uses speculative execution and cache side-channel techniques to read arbitrary memory from protected kernel space. The exploit is run from the command line, requiring the user to specify a memory address and size. The code is written in C and is intended for research and demonstration purposes, not for weaponization. No network or remote endpoints are involved; the attack vector is purely local, requiring code execution privileges on the target system.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
45 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A speculative execution side-channel vulnerability affecting multiple CPU architectures, allowing unauthorized data disclosure across privilege boundaries.
The Meltdown speculative execution vulnerability referenced as one of the CVEs used to detect vulnerable systems.
The Meltdown CPU vulnerability, mentioned in the leaked discussions as an older CVE reference.
A CPU speculative execution vulnerability for which Google references KPTI-based mitigations, including Android and Chrome OS patching.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.